Mercedes-Benz CLA-Class Service Bulletins

578 manufacturer communications on file.

• May 28, 2026•Document ID: 11032968

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.71-P-080653

  Date Added:

  May 28, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint After updating MB.OS to 1.3.7, every key cycle displays consistent instrument cluster message "Driver Assistance System Functions Limited Please Drive with Caution See Operator's Manual". Note: Verify this is the exact message, there are other variants of white ADAS cluster messages. The driver assistance control unit N62/5 Processor will also have an active and stored DTC U142791 - "Implausible data were received from the control unit 'Head unit'. The parameter is outside the permissible range." Cause Under Determination. Remedy Check for new MB.OS update on May 29, 2026 from 1.3.7 to 1.3.10. If available, update and bus sleep (30 minutes). Re-check vehicle after bus sleep for presence of cluster message. If message has cleared and concern is resolved, release the vehicle. If not, open a TIPS case to Body, Chassis, and Entertainment inbox.

  Associated Products (1)

  2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11032968-0001.pdf↗
• May 26, 2026•Document ID: 11033185

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.85-P-080507

  Date Added:

  June 2, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the instrument cluster. In addition, the following two conditions are also met: • HERMES (N112/9) control unit: event code B15CE00 is ACTIVE and STORED (A+S) • Vehicle Documentation System: For the HERMES control unit, the EID1, EID2, ICCID, IMEI, IMSI, TELNR fields in the "Identification/Serial number" column have the value "-" Cause Still under analysis Remedy Recommission the HERMES control unit (N112/9) with XENTRY Diagnosis 03/2026 and add-on 33399 installed or carry out the procedure with a newer version of XENTRY Diagnosis: XENTRY→ "N112/9 - Control unit for telematics services (HERMES)" -> "Adaptations" -> "Control unit commissioning" -> "Commissioning of previously installed control unit"

  Associated Products (175)

  2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLE-Class2026 Mercedes-Benz GLS-Class2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz G-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz GLS-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz EQB-Class2024 Mercedes-Benz G-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class+ 155 more
  Associated Documents

  • DownloadMC-11033185-0001.pdf↗
• May 23, 2026•Document ID: 11033421

  Other
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  ANN - CLA/174

  Date Added:

  June 4, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  In some cases, we are seeing issues with the CLA/174. After updating the CPR to 1.3.7, a coding mismatch is occurring between the CIVIC174 & IDC control units causing a driver assistance msg in the cluster. We are currently working diligently toward a solution. If you need support, please create an XSS Diagnosis case with necessary ID1 support package and we are happy to support. Thank you for your patience.

  Associated Products (2)

  2027 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11033421-0001.pdf↗
• May 22, 2026•Document ID: 11033019

  Service Bulletin/Repair Instructions
  STEERING

  Mfr Comm. #:

  LI46.15-P-070510

  Date Added:

  May 30, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Noises from the area of the steering column. - Creaking - Squeaking - Chattering - Humming - Grinding Cause At present, there are no known noise problems with the steering column. Remedy Check surrounding area of the steering column for possible noises. • Instrument panel support • Steering column switch module NOTE: Occasionally to verify complaint, the steering column/vehicle needs to be in direct sunlight or hot conditions for a few hours. If noise only occurs when adjusting the steering column via electric actuation, please perform: 1. Disassemble bellows of steering column tube module. 2. Move steering column entirely out and entirely down. 3. Grease steering column on all pivot points including, but not limited to, green-marked positions with a suitable brush (find pictures in attachment). 4. Move column up 1/4 of the way and grease again. 5. Continue until upper limit stop is reached. 6. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 7. If noise does not resolve, wipe excess grease off and perform greasing and movement to limit stops in all directions again. For all other noises or if the above does not resolve, create a TIPS case Body, Chassis, and Entertainment inbox. Attach a detailed description of the noise complaint, images, and a recording of the noise. Include detailed items of the following: • Position of height and longitudinal adjustment when the noise occurs • If possible, locate affected component part on steering column • State any change in the noise when steering column component parts are touched (e.g. spring, etc.)

  Associated Products (64)

  2027 Mercedes-Benz CLA-Class2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLE2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLE-Class2026 Mercedes-Benz GLS-Class2026 Mercedes-Benz S-Class2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz CLE2025 Mercedes-Benz E-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class+ 44 more
  Associated Documents

  • DownloadMC-11033019-0001.pdf↗
• May 21, 2026•Document ID: 11032892

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; STEERING

  Mfr Comm. #:

  LI46.35-P-079982

  Date Added:

  May 21, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Fault code P063544 - The electric power steering is malfunctioning. There is an error in the data memory. Active and stored in the electric power steering control unit (N68) Cause The steering limitations of the electric power steering are not fully taught in. Remedy The steering limitations are taught in during normal vehicle use and the fault remains active and stored until the steering limitations have been taught in. The steering limitations can also be taught in manually: 1. Drive at >2 km/h, steer left or right to one of the steering limitations and hold the steering wheel there for at least 1 second. 2. Drive straight ahead at >30 km/h for at least 5 seconds 3. After another bus rest period (vehicle locked for at least 10 minutes and key out of range), the fault is stored and can be deleted.

  Associated Products (1)

  2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11032892-0001.pdf↗
• May 19, 2026•Document ID: 11032891

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; LANE DEPARTURE: BLIND SPOT DETECTION; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

  Mfr Comm. #:

  LI54.71-P-080345

  Date Added:

  May 21, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Brief (a few seconds), self-healing "driver assistance systems unavailable" messages are expected and normal due to system limitations and environmental effects. This can occur during startup of the vehicle but also during driving. No case is necessary for these. Please refer to the Owner's Manual for driver assistance system limitations and environmental effects. For "driver assistance systems unavailable" that are persistent or show on every key cycle AND Vehicle was produced prior to February 27, 2026. Cause Cause 1: In rare cases, one or more of the fault codes U05B555, U05B655, U05B755 or U05B855 (implausible data was received from the front/rear outer right/left radar sensor. The component part is not configured.) is "Active" in the N62/5 control unit. This cause mainly occurs in vehicles produced prior to September 5, 2025. Cause 2: The initial calibration of the acceleration sensor (IMU) in the N62/5 control unit was not performed/completed. There is no relevant fault code active in the N62/5 control unit. This cause mainly occurs in vehicles produced prior to February 27, 2026. Remedy Remedy 1: Navigate to N62/5 control unit via XENTRY and carry out: "Adaptations > Teach-in processes > Calibration of the N62/5 control unit (driver assistance system control unit)." If it is not possible to perform this process or the system is recognizing that all sensors are already calibrated and nothing further needs to be completed, we alternatively recommend carrying out "Calibration drive after exchange of the component part front bumper or rear bumper" under Teach-in processes. Once the calibration is started, the calibration screen will appear on the head unit. Xentry will instruct the user to disconnect the device from the vehicle and perform the driving calibration. XENTRY MUST be disconnected and cannot be left connected. Remedy 2: Navigate to N62/5 control unit via XENTRY and carry out: "Adaptations > Teach-in processes > Calibration of the N62/5 control unit (driver assistance system control unit)." If there are no identified calibrations, perform calibration drive for the N62/5 control unit. No XENTRY diagnostic device is required for this, as the calibration does not need to be initiated via XENTRY! Perform a calibration drive of at least 5 minutes and at least 20 turns (left/right evenly distributed) without interrupting the drive (stop and go is permissible, but no ignition cycling). The driving speed should be approximately 20 km/h, and the steering wheel angle about 180 degrees (ideal are 90° turns that must be driven through at more than 10 km/h). No message is displayed to indicate that the calibration has been successfully completed. After the calibration drive, the vehicle must be parked and locked for at least seven minutes to allow the vehicle bus to enter sleep mode. Once the bus sleep mode has completed, the fault messages should no longer be displayed in the driver display. Driver support systems may still not be fully available at this time. This is indicated by the ADAS system icons (see picture ADAS icons). These are available after a further driving time of approx. 10 minutes. Connect the vehicle to Mercedes me Connect. MB.Drive, Navigation, and On-Demand features REQUIRE that the vehicle is linked to a profile. Please also note the additional information regarding the connection between Mandatory Pairing (Head Unit Profile) and Pre-Delivery Inspection (PDI).

  Associated Products (1)

  2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11032891-0001.pdf↗
• May 19, 2026•Document ID: 11032875

  Service Bulletin/Repair Instructions
  VISIBILITY/WIPER

  Mfr Comm. #:

  LI82.30-P-059239

  Date Added:

  May 20, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper blades squeaking, chattering, shuddering B: The windshield is not wiped completely (streaking) C: During the downward movement water is pulled back onto the windshield from the A-pillar (Figure 1) D: After windshield cleaning, water keeps spraying onto the windshield for several wipe cycles (Figure 2) A1: The windshield and wiper blades are contaminated with residues from car washing facilities, identifiable by the water beading. The resulting differences in the friction values between the wiper blades and the windshield can excite the wiper blades to vibrate. Note: It is mostly wax residue from the washer system, but also water-repellent nano-particle coating for paint and/or silicone-based washer fluid, that could cause this problem. A partially dry windshield also has different friction values, which can likewise result in squeaking of the wiper blades A2: The wiper blades are worn by mechanical damage (wiper lip damaged by ice or insect debris, or deformed by long periods of disuse). A3: Incorrect angle of incidence of the wiper arms to the windshield. Because of this, the rubber lip of the wiper blade may not flip over at the reversal point. Cause B: B1: Wax/ dirt residues on the windshield B2: Wiper blades deformed or worn B3: Downforce of wiper arm not OK (Figure 3) Cause C: Water is pulled back onto the windshield by the differential pressure created as the wiper arm moves downwards. Cause D: Washer water collects in the fastening of the wiper blade and is blown onto the windshield by the airstream over several wipe cycles. Note and supporting information: Wiper blades are wear parts which, even when "not used" for long periods (kept in park position), may become permanently deformed and damaged. Further stresses on the rubber wiper blade arise due to various environmental influences which progressively change the effectiveness of the rubber wiper blade and accelerate the aging process. Due to the natural aging process and wear, the wiper blades should be replaced twice a year, preferably in Spring and Fall (see operator's manual). Remedy Remedy A: A1: Cleaning entire windshield with A 000 986 40 71. A2: Checking water's flow behavior after windshield has been cleaned (see Video 1). If, after cleaning, there are still areas with water beading, then the cleaning process must be carried out again until a rejection reaction is no longer present. • Note: On the vehicle in the video (Video 1), water still beads on the bottom left of the windshield. The windshield is still not properly clean, even though it appears to be clean. The windshield is only properly clean when there are no more areas on the windshield where water beads. A3: Replace wiper blades with genuine wiper blades. Important: Only exchange wiper blades if windshield no longer has water-repellent areas Note: Replacement of wiper blades is not covered under warranty and can be replaced at the expense of the customer. Remedy B: B1: Clean windshield with intensive cleaner A 000 986 40 71. Important: Do not clean the wiper blades otherwise the graphite coating will be damaged. B2: Replace wiper blades with genuine wiper blades • Note: Replacement of wiper blades is not covered under warranty and can be replaced at the expense of the customer. B3: Check the wiper arm for excessive resistance in the bearing. Restore mobility or replace wiper arm if necessary. Remedy C: Problem inherent in design for which there is no technical remedy. Exception: X204 up to 02/2014. In these vehicles, it is possible to install the design configuration of vehicles as of 02/2014. This includes wiper arms (styled arms) with improved behavior in this respect. It is also necessary to replace the wiper blades because the styled arms feature a Top Lock connection (previously Side Lock).

  Associated Products (221)

  2027 Mercedes-Benz CLA-Class2026 Mercedes-Benz AMG GT2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLE2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLE-Class2026 Mercedes-Benz S-Class2026 Mercedes-Benz SL-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz CLE2025 Mercedes-Benz E-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class+ 201 more
  Associated Documents

  • DownloadMC-11032875-0001.pdf↗
• May 18, 2026•Document ID: 11032872

  Service Bulletin/Repair Instructions
  STEERING; ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI46.35-P-080591

  Date Added:

  May 20, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint • Uneven steering feel when steering left and right, especially when steering near the center position. or • Squeaking noise when steering quickly around the center position Cause Variation in the steering gear due to manufacturing tolerances. Remedy 1. Check the vehicle's MB.OS software release with Xentry and update if necessary. 2. Connect Xentry, switch on the ignition (vehicle not roadworthy and power steering off), and raise the vehicle so that the wheels are not loaded. 3. Navigate to control unit N80, Steering Column Switch Module, actual values tab, and locate "Steering Angle". 4. Turn the steering wheel to full lock left until the mechanical end stop of the steering is reached. Record the steering wheel angle. 5. Perform a full lock to the right until the mechanical end stop is reached. Record the steering wheel angle. 6. Depending on whether the positive or negative value is greater, reposition the steering wheel by one tooth in the relevant direction (refer to AR46.10-P-0100CLA). Positive value is greater => Shift steering wheel one tooth to the right (clockwise) Negative value is greater ⇒ Shift steering wheel one tooth to the left (counterclockwise) Example steering angle: 450° and -462° => Move the steering wheel one tooth to the left. 7. Perform a wheel alignment. Pay particular attention to adjusting the toe values accordingly. 8. Reset the straight-ahead learned value with XENTRY in the N68 electric power steering control unit. 9. Perform bus sleep (lock the vehicle, keep the key out of range, and leave it locked for at least 15 minutes). 10. Perform a test drive and re-assess. If, after the subsequent test drive, any of the previously mentioned problems persist, please create a TIPS case to the Body/Chassis/Entertainment team.

  Associated Products (2)

  2027 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11032872-0001.pdf↗
• May 16, 2026•Document ID: 11032789

  Service Bulletin/Repair Instructions
  SUSPENSION

  Mfr Comm. #:

  LI32.25-P-070053

  Date Added:

  May 20, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint There may be creaking noises when steering while stationary or driving slowly. See Example Noise attachment Cause The vehicle level of the front axle may be too low. The noises when steering can be caused by continuous contact of the end stop buffer with the damper tube. Remedy IMPORTANT: Do not apply document to vehicles outside of the listed validity range. The vehicle level must first be measured using the romess inclinometer (follow WIS instructions!) and the measured values should be compared with the target values in the Wheel Alignment online tool. If the vehicle level is out of tolerance, then the springs on the front axle must be replaced in order to correct the level. The currently installed springs can be pulled up in the XENTRY Parts Information tool through the corresponding selection. How to identify currently installed springs: • Check for colored dots on the front springs. • If no dots or color markings, please check if there is a parts label that is affixed to the spring. If the MB part number is listed, continue with process listed in the paragraph below. • If the part label does not contain an MB part number, is missing or illegible, please check for a barcode label with a 3 digit number. See "Spring Barcode" picture for example. Open a TIPS case with this number and list that it is from the barcode attached to the currently installed spring. • If none of the above references can be found, open a TIPS case. How to identify next spring in line with color dots: • Navigate to the parts catalog and enter the vehicle VIN/FIN. • Navigate to group 32 sub-group 054 (front spring strut) and find the spring. The spring listed in the parts catalog will have a "color marking" indicator. If the dots on the spring and the color listed in the parts catalog is the same then you have the part number of the currently installed spring. If it does not, then you need to clear the vehicle specific filter by using the funnel icon on the right side column of the page and clicking "no filter" at the top and then "apply filter" (see "Clear Vehicle EPC Filter" for how-to pictures). Proceed to finding the spring that matches the color dots on the vehicles currently installed spring. • In order to find the correct or next highest spring, the spring filter must be removed in the XENTRY Parts Information tool. • The spring item numbers are normally listed in sequence (observe and verify valid SA code for vehicle). The next strongest spring is selected by the ascending, next highest item number (Example: If the currently installed spring ends in "13 00" then then next spring in line is "14 00".) How to identify next spring in line with part number tag: • Navigate to the parts catalog and enter the vehicle VIN/FIN and the part number found from the spring. • In order to find the correct or next highest spring, the spring filter must be removed in the XENTRY Parts Information tool. To do this, you need to clear the filters by using the funnel icon on the right side column of the page and clicking "no filter" at the top and then "apply filter" (see "Clear Vehicle EPC Filter" for how-to pictures).

  Associated Products (28)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz EQB-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz EQB-Class2023 Mercedes-Benz GLA-Class2023 Mercedes-Benz GLB-Class2022 Mercedes-Benz A-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz EQB-Class2022 Mercedes-Benz GLA-Class2022 Mercedes-Benz GLB-Class+ 8 more
  Associated Documents

  • DownloadMC-11032789-0001.pdf↗
• May 15, 2026•Document ID: 11032751

  Service Bulletin/Repair Instructions
  SUSPENSION; WHEELS

  Mfr Comm. #:

  LI40.10-P-061032

  Date Added:

  May 18, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Noises at the front axle when cornering or maneuvering (video files attached) Note: Save video files locally and play them with Windows Media Player. Cause Driving with summer tires in combination with low outside temperatures. At low outside temperatures or in wet conditions, a noise may be produced at the outer wheel on the front axle while maneuvering with sharp steering angles. Note: AMG vehicles with 4MATIC of model series 217 (without code 494) and model series 222 have a modified axle geometry compared with series production vehicles to provide more sporty handling. The problem cannot be remedied by changing the axle settings.

  Associated Products (165)

  2026 Mercedes-Benz AMG GT2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLS-Class2026 Mercedes-Benz S-Class2026 Mercedes-Benz SL-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz C-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz GLS-Class2025 Mercedes-Benz S-Class2025 Mercedes-Benz SL-Class2024 Mercedes-Benz AMG GT2024 Mercedes-Benz C-Class+ 145 more
  Associated Documents

  • DownloadMC-11032751-0001.pdf↗
• May 12, 2026•Document ID: 11032699

  Service Bulletin/Repair Instructions
  BACK OVER PREVENTION: WARNINGS; LANE DEPARTURE: BLIND SPOT DETECTION; ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.65-P-080132

  Date Added:

  May 14, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics Cause Various root causes Remedy See attached diagnostic guide.

  Associated Products (117)

  2027 Mercedes-Benz CLA-Class2026 Mercedes-Benz AMG GT2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLE2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLE-Class2026 Mercedes-Benz GLS-Class2026 Mercedes-Benz S-Class2026 Mercedes-Benz SL-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz CLE2025 Mercedes-Benz E-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz G-Class+ 97 more
  Associated Documents

  • DownloadMC-11032699-0001.pdf↗
• May 9, 2026•Document ID: 11032463

  Service Campaign
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  NCU - 2026040004

  Date Added:

  May 8, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2026 CLA (174 platform) vehicles, the software of the communication module (ARTEMIS) might not be configured according to current production specifications. As a result, remote status updates, or remote commands may not be available through the Mercedes-Benz App. Remedy MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the software in the ARTEMIS control unit on the affected vehicles. With the update of the ARTEMIS, the latest Mercedes-Benz Operating System (MB.OS) version will also be installed on the vehicles.

  Associated Products (1)

  2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11032463-0001.pdf↗
• May 8, 2026•Document ID: 11032576

  Service Bulletin/Repair Instructions
  STEERING

  Mfr Comm. #:

  LI46.15-P-070510

  Date Added:

  May 11, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Cause At present, there are no known noise problems with the steering column. Remedy Check surrounding area of the steering column for possible noises. • Instrument panel support • Steering column switch module If noise only occurs when adjusting the steering column via electric actuation please perform: 1. Disassemble bellows of steering column tube module. 2. Move steering column entirely out and entirely down. 3. Grease steering column on green-marked positions with a suitable brush (find pictures in attachment). 4. Move column up 1/4 of the way and grease again. 5. Continue until upper limit stop is reached. 6. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 7. If noise does not resolve, perform above procedure again and anywhere there are movement or friction points that the noise seems to be emanating from. 8. Then move steering column adjustment in all directions from limit stop to limit stop several times to work in the grease. 9. If noise still does not resolve, please open a TIPS case. For all other noises or if the above does not resolve, create a TIPS case Body, Chassis, and Entertainment inbox. Attach a detailed description of the noise complaint, images, and a recording of the noise. A detailed description includes: • Position of height and longitudinal adjustment when the noise occurs • If possible, locate affected component part on steering column • State any change in the noise when steering column component parts are touched (e.g. spring, etc.)

  Associated Products (64)

  2027 Mercedes-Benz CLA-Class2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLE2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLE-Class2026 Mercedes-Benz GLS-Class2026 Mercedes-Benz S-Class2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz CLE2025 Mercedes-Benz E-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class+ 44 more
  Associated Documents

  • DownloadMC-11032576-0001.pdf↗
• May 8, 2026•Document ID: 11032520

  Service Campaign
  ENGINE

  Mfr Comm. #:

  NCU - 2026040007

  Date Added:

  May 8, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (MY) 2024 CLA (118 platform) vehicles, the engine electronics control unit software does not correspond to the current production specifications. There is a possibility that the Air Fuel Imbalance (AFIM) diagnosis for the air/fuel ratio could fail. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the software of the engine electronics control unit in the affected vehicles.

  Associated Products (1)

  2024 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11032520-0001.pdf↗
• May 7, 2026•Document ID: 11032581

  Service Bulletin/Repair Instructions
  VISIBILITY/WIPER

  Mfr Comm. #:

  LI67.39-P-080552

  Date Added:

  May 11, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer reports that a side window will not close using the automatic (one‑touch) function, or the window reverses direction while closing. • Condition may occur on one or more doors • Fault code B25A3F0 may be stored in the affected door control unit • Window normalization may be lost Cause System error in the power window motor Remedy 1.) Update SCN coding of the affected door control unit (N69/x) using Xentry. • Repair coding is available with Car Package Release (CPR) 1.3.0 or higher. 2.) If the complaint persists after SCN coding or for repeat complaints → replace the power window motor on the affected door following applicable WIS instructions.

  Associated Products (2)

  2027 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11032581-0001.pdf↗
• April 24, 2026•Document ID: 11031558

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  LI00.01-P-078887

  Date Added:

  April 25, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint The intent of this document is to provide workshops with helpful technical reference language. • Commonly used acronyms in LI's and TIPS cases. • Control unit names, numbers, and how to identify. • Network/wiring architecture groups to baumuster quick reference. • Platform to baumuster quick reference. Cause Information only Remedy Acronyms: • AV = Actual Values • CPR = Car Package Release (For MB.OS) • CU = Control Unit • CUL = Control Unit Log • DTC = Diagnostic Trouble Code • E-Stand = Fresh-up head unit boot software (found in head unit control unit log) • FUP = Fresh-up • FW = Firmware • HSVL = High Speed Video Line • HU = Head Unit • HW = Hardware • IPD = Injector Performance Data • ISU = Initial Start Up • LVDS = Low Voltage Differential Signal • NAG"x" = New Automatic Gearbox ("x" is the generation number, example: NAG3) • NSFT = Not Safe For Transport • MOPF = Model Facelift (Ex: 167 MOPF) • PiH = Plug-in Hybrid • SA Code = Sonderausstattungscode (Option Code) • SCN = Software Calibration Number • SW = Software • TCU = Telecommunication Control Unit (Hermes/Ramses/Etc...) • QT = Quicktest • XD = XENTRY Diagnosis Control Unit Identification: Refer to the attachment "Control Unit Nomenclature" for location of each. • Control Unit Name • Control Unit Number • Control Unit Short name • Control Unit Diogenes ("dy-oj-uh-neez") name - Control unit variant/family. Network/Wiring Architecture to Baumuster Quick Reference: Star 1 • 117, 156, 246 (MFA) • 166, 176, 221, 242, 246, 292 • 906 Star 2 • 205, 213, 238, 253, 257, 290 (MRA) • 117, 156, 246 (MFA) • 118, 177, 243, 247 (MFA2) • 167, 222, 292, 463, 465 • 907 Star 3 • 294, 295, 296, 297 (EVA2) • 206, 214, 223, 236, 254 (MRA2) • 192 and 232 (MSA) Star 3.5 • 174 • 178 Platform to Baumuster Quick Reference: MRA = "Mercedes-Benz Rearwheel Architecture": • 205 • 213 • 222 • 238 • 253 • 257 • 290 MRA2 = "Mercedes-Benz Rearwheel Architecture - Generation 2": • 206 • 214 • 223 • 236 • 254 MFA = "Mercedes-Benz Frontwheel Architecture" • 117 • 156 • 246 MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2" • 118 • 177 • 243 • 247 EVA1.5 = "Electric Vehicle Architecture" • 243 EVA2 = "Electric Vehicle Architecture - Generation 2" • 294 • 295 • 296 • 297 MSA = "Mercedes-Benz Sport Architecture" • 192 • 232 MMA = "Mercedes-Benz Modular Architecture" • 174 • 178

  Associated Products (109)

  2026 Mercedes-Benz AMG GT2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLE2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLE-Class2026 Mercedes-Benz SL-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz CLE2025 Mercedes-Benz E-Class2025 Mercedes-Benz G-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class+ 89 more
  Associated Documents

  • DownloadMC-11031558-0001.pdf↗
• April 18, 2026•Document ID: 11031845

  Other
  ENGINE

  Mfr Comm. #:

  CL - 2026010005

  Date Added:

  May 1, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Dear Mercedes-Benz Owner: On behalf of Mercedes-Benz USA, LLC (“MBUSA”), thank you for being a part of the Mercedes-Benz family. We hope that you are enjoying your vehicle. Here at MBUSA, we are committed to delivering an exceptional ownership experience. In our continuing efforts to ensure the proper performance and quality of your vehicle, we are writing to inform you that on certain Model Year 2021 - 2023 CLA and GLA vehicles, the nozzle geometry of the exhaust turbocharger might not meet specifications. This could affect exhaust flow in certain load/rpm ranges and increase NOx emissions, potentially causing the vehicle to exceed emissions regulatory limits. An Emission Service Campaign is being conducted to remedy the situation. Our records indicate that your vehicle is included in the affected population of vehicles.

  Associated Products (6)

  2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLA-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz GLA-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz GLA-Class
  Associated Documents

  • DownloadMC-11031845-0001.pdf↗
• April 16, 2026•Document ID: 11031580

  Service Bulletin/Repair Instructions
  EXTERIOR LIGHTING

  Mfr Comm. #:

  LI82.10-P-078301

  Date Added:

  April 27, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Remedy Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps: 1. Drive vehicle into workshop (temperature higher than +18 °C/+64.4 °F) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing of fogged/condensed LED headlamps and LED rear lamps on electric vehicles: 1. Drive the vehicle into the workshop (temperature higher than +18 °C/+64.4°F). 2. Connect battery backup via a charger. 3. Open the front-end flap and ensure sufficient ventilation. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop (temperature higher than +18 °C/+64.4°F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Note: If there is no visible reduction in condensation, check the headlamp for malfunctions. (see Remedy 2) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Note: Only implement Remedy 1 for model series 463 (from model year 2018) and model series 465. Remedy 2 A defective headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness according to LI82.10-P-078307. The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions. Note: External damage to the headlamp/rear lamp or faulty seating of the cover caps does not present a warranty or goodwill case. Note: With headlamps, it is possible to install desiccant packs if the problem occurs repeatedly. • Open ventilation system LI82.10-P-078302 • Closed ventilation system LI82.10-P-078304

  Associated Products (285)

  2026 Mercedes-Benz AMG GT2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz CLE2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLE-Class2026 Mercedes-Benz GLS-Class2026 Mercedes-Benz SL-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz CLE2025 Mercedes-Benz E-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz G-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class+ 265 more
  Associated Documents

  • DownloadMC-11031580-0001.pdf↗
• April 4, 2026•Document ID: 11031254

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.71-P-080345

  Date Added:

  April 10, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Brief (a few seconds), self-healing "driver assistance systems unavailable" messages are expected and normal due to system limitations and environmental effects. This can occur during startup of the vehicle but also during driving. No case is necessary for these. Please refer to the Owner's Manual for driver assistance system limitations and environmental effects. If the vehicle is on MB.OS 1.3.0 or later and the "driver assistance systems unavailable" message displays in the instrument cluster and either: • DOES NOT clear within a few seconds OR • Appears on every key cycle and DOES NOT clear NOTE: To find the MB.OS version number: 1. Navigate to VeDoc. 2. Go to "Control Units" tab. 3. Find the header bar labeled "Vehicle Information for Control Units". 4. Locate "MB.OS car package release customer version". Cause Cause 1: In rare cases, one or more of the fault codes U05B555, U05B655, U05B755 or U05B855 (implausible data was received from the front/rear outer right/left radar sensor. The component part is not configured.) is "Active" in the N62/5 control unit. This cause mainly occurs in vehicles produced prior to September 5, 2025. Cause 2: The initial calibration of the acceleration sensor (IMU) in the N62/5 control unit was not performed/completed. There is no relevant fault code active in the N62/5 control unit. This cause mainly occurs in vehicles produced prior to February 27, 2026. Cause 3: Above "Cause 2" did not fix. IDC hardware and software reset and full sensor suite calibration needed. Cause 4: Occasionally the vehicle will exhibit all ADAS systems offline on key cycle or during driving. Once the key is cycled the systems will function and messages gone. Subsequent key and drive cycles will not exhibit. Due to environmental influence or other reason. Remedy Remedy 1: Navigate to N62/5 control unit via XENTRY and carry out: "Adaptations > Teach-in processes > Calibration of the N62/5 control unit (driver assistance system control unit)." If it is not possible to perform this process or the system is recognizing that all sensors are already calibrated and nothing further needs to be completed, we alternatively recommend carrying out "Calibration drive after exchange of the component part front bumper or rear bumper" under Teach-in processes. Once the calibration is started, the calibration screen will appear on the head unit. Xentry will instruct the user to disconnect the device from the vehicle and perform the driving calibration. XENTRY MUST be disconnected and cannot be left connected. Remedy 2: Navigate to N62/5 control unit via XENTRY and carry out: "Adaptations > Teach-in processes > Calibration of the N62/5 control unit (driver assistance system control unit)." If there are no identified calibrations, perform calibration drive for the N62/5 control unit. No XENTRY diagnostic device is required for this, as the calibration does not need to be initiated via XENTRY! Perform a calibration drive of at least 5 minutes and at least 20 turns (left/right evenly distributed) without interrupting the drive (stop and go is permissible, but no ignition cycling). The driving speed should be approximately 20 km/h, and the steering wheel angle about 180 degrees (ideal are 90° turns that must be driven through at more than 10 km/h). No message is displayed to indicate that the calibration has been successfully completed. After the calibration drive, the vehicle must be parked and locked for at least seven minutes to allow the vehicle bus to enter sleep mode. Once the bus sleep mode has completed, the fault messages should no longer be displayed in the driver display. Driver support systems may still not be fully available at this time. This is indicated by the ADAS system icons (see picture ADAS icons). These are available after a further driving time of approx. 10 minutes. Please see attachment.

  Associated Products (1)

  2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11031254-0001.pdf↗
• April 4, 2026•Document ID: 11031206

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.71-P-080314

  Date Added:

  April 9, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Either during PDI or after updating vehicle software, there may be: • "A+S" - Active and Stored DTC • "S" - Stored DTC Some known erroneous DTC's are: • C1016E0 with error ID: SIG_ESP_71 • B15BF00 with error ID: SIG_SEMA_C_22 • U0420E2 with error ID: SYS_EPS_22 • U041629 with error ID: SIG_ESP_12 • U013187 • U044229 Cause Software status of IDC_GEN6 In some cases, a diagnosis session or a software update may generate fault codes that do not cause any restrictions in customer operations. Remedy If: • All driver assist functions operate without restrictions AND • There are no persistent driver assist cluster messages (Example: white message for "Driver Assist Systems Inoperative") AND • No persistently yellow driver assist cluster icons The DTC's may be ignored. If any of the above are true during PDI or after software update, please check LI54.71-P-080345 or open a TIPS case to the Body/Chassis/Entertainment inbox.

  Associated Products (1)

  2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11031206-0001.pdf↗