Mercedes-Benz C-Class Service Bulletins

930 manufacturer communications on file.

• June 17, 2025•Document ID: 11019746

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  LI00.01-P-078887

  Date Added:

  June 26, 2025

  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 • 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 • NSFT = Not Safe For Transport • MOPF = Model Facelift (Ex: 167 MOPF) • PiH = Plug-in Hybrid • P3 Hybrid = AMG Plug-in Hybrid with rear drive unit • 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: 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 Star 1 • 117, 156, 246 (MFA) • 166, 176, 221, 242, 246, 292 Star 2 • 205, 213, 238, 253, 257, 290 (MRA) • 117, 156, 246 (MFA) • 118, 177, 243, 247 (MFA2) • 167, 222, 292, 463, 465, 906 Star 3 • 294, 295, 296, 297 (EVA2) • 206, 214, 223, 236, 254 (MRA2) • 192 and 232 (MSA) • 907 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

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  Associated Documents

  • DownloadMC-11019746-0001.pdf↗
• June 12, 2025•Document ID: 11020009

  Emissions
  ENGINE; ELECTRICAL SYSTEM

  Mfr Comm. #:

  Emissions - 2025040001

  Date Added:

  July 1, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the engine control software might not meet current specifications. As a result, the diagnosis routine for monitoring the air-fuel ratio might not be activated as intended and a malfunction in the oxygen sensor could be erroneously detected causing the “check engine” Malfunction Indicator Lamp (‘MIL’) to illuminate. MBUSA will conduct a voluntary emissions recall. An authorized Mercedes-Benz dealer will update the engine control unit software.

  Associated Products (4)

  2024 Mercedes-Benz C-Class2024 Mercedes-Benz G-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz G-Class
  Associated Documents

  • DownloadMC-11020009-0001.pdf↗
• June 9, 2025•Document ID: 11019747

  Service Bulletin/Repair Instructions
  STEERING

  Mfr Comm. #:

  LI46.15-P-063353

  Date Added:

  June 26, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position (e.g. with Easy Entry function), noise (breakaway noise) when leaving the limit stops of the height adjustment. Cause Height adjustment moves to the top/bottom limit stop and jams. 1. Driver seat control unit software 2. Steering column height adjustment transmission Remedy There are 2 repair procedures to follow depending on vehicle (differentiated according to model and vehicle manufacturing date) 1. Perform software update of driver's seat control unit 2. Replace repair kit for steering column height adjustment Procedure 1: Perform software update of driver seat control unit. ALL models except 205/253/293/222/217/231/463/213/238/257/290 up to special equipment code 801. • Move out the fore/aft adjustment to the end position. • Release jamming of height adjustment by knocking with palm of hand onto top of steering wheel/at the same time pressing adjustment switch downward • After releasing the jam, perform a software update of the driver's seat control unit If procedure 1 is not effective, there is no new software available for the driver seat control unit, or the chassis is not listed above (167, 223, 294, 206, 294, 295, 296, 297,232,214,254) then use procedure 2. Procedure 2: Replace repair kit for steering column height adjustment. • Move out the fore/aft adjustment to the end position. • Release jamming of height adjustment by knocking with palm of hand onto top of steering wheel/at the same time pressing adjustment switch downward • Remove footwell trim on driver's side. • Determine type version of height adjustment in XENTRY Parts Information and order appropriate replacement part (refer to attachment). 1. Version A: A 231 460 77 00 2. Version B: A 205 460 38 03 • Remove steering column. • Remove height adjustment (adjustment repair kit). • Install repair kit (adjustment repair kit) (observe tightening torque for screws in attachment). • Install steering column. • If possible, flash driver seat control unit to latest software release or code SCN again. • Commission driver seat control unit (normalization of limit stops is deleted and learning process repeated).

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  Associated Documents

  • DownloadMC-11019747-0001.pdf↗
• June 4, 2025•Document ID: 11019601

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI20.10-P-076206

  Date Added:

  June 17, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy An updated thermostat must be installed. A TIPS case must be created to order the part. Order the correct thermostat part number for your application: CLA45/GLA45: A 139200 66 02 All other M139 equipped vehicles: A 139 200 64 02 New screws must also be ordered and installed with the revised thermostat, PN N000000006341 (qty 2) will be used in place of the existing M8 screws. on the face of the thermostat. The new screws must be torqued to 8 Nm. Follow the instructions in WIS for removal and installation with the exception of the thermostat screw torque value mentioned previously. After replacement, fill and bleed the coolant system per the instructions in WIS for the model that is being worked on. QC the car on a test drive. If the complaint is remedied, release the vehicle.

  Associated Products (10)

  2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLA-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz GLA-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz GLA-Class2020 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11019601-0001.pdf↗
• June 2, 2025•Document ID: 11019599

  Service Bulletin/Repair Instructions
  POWER TRAIN; ENGINE

  Mfr Comm. #:

  LI01.00-P-078172

  Date Added:

  June 17, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Dull thumping noise or ticking noise under the vehicle in the area of the engine/two-mass flywheel/transmission. Is significantly perceptible at the front right wheel well and can also be faintly heard in the vehicle interior. Cause The ticking noise occurs in idle operation in drive program C & S at 780 rpm when the state of charge of the battery is over 65% and the load requirement at the belt-driven starter alternator is simultaneously over 25 Nm. The load requirement can occur due to a number of auxiliary consumers (e.g. air conditioning system, steering wheel or seat heating, etc.). Remedy Do not replace any parts Check whether a software update for N127 (PTCU) and N15/15 (transmission) is available. If no software update is available, create a TIPS case and send to HQ together with the following documents: • Videos of the problem from the exterior and in the vehicle interior • Control unit log, engine N3/10 (ME) • Control unit log, drivetrain N127 (PTCU)

  Associated Products (5)

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  Associated Documents

  • DownloadMC-11019599-0001.pdf↗
• May 30, 2025•Document ID: 11018714

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.85-P-079088

  Date Added:

  May 30, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint The following most common complaints may be observed: • Brief connectivity interruptions when using Apple CarPlay over Wi-Fi • Audio cuts out • Device not recognized • No operation possible Cause There are multiple possible causes for an iPhone disconnecting from a vehicle’s head unit while using Apple CarPlay. These include hardware, software, and environmental factors: Environmental Interference External Sources: • Passing under toll bridges, driving near airports, or areas with heavy electronic interference (e.g., as described in LI82.85-P-076157) can cause connection drops. Cellular Networks: • Interference from nearby cell towers operating on similar frequencies (usually 2.4GHz or 5GHz) can disrupt the signal. Storage Location: • Keeping your phone in a handbag or surrounded by other objects inside the vehicle can create physical or electronic interference. Device and Software Issues Head Unit Software/Hardware: • Outdated firmware, bugs, or hardware faults in the vehicle’s head unit can prevent a stable connection. iPhone Software/Hardware: • Similar issues in the iPhone, including buggy iOS updates or hardware problems, may affect performance. Reset or Reboot: • Automatic rebooting or resetting of either the head unit or the iPhone will temporarily disrupt CarPlay. Connection and Settings Wired Connections: • Faulty Cable: A damaged or poor-quality USB cable can cause intermittent or total loss of connection. • USB Port Issues: Dust, debris, or physical damage in the USB port of either the head unit or the iPhone can also lead to disconnects. Wireless Connections: • Intermittent Bluetooth/Wi-Fi: Unstable wireless communication (Bluetooth/Wi-Fi) can frequently break the Car- Play connection. Power Management: • Battery Saver Mode: Enabling low power mode may restrict background processes, affecting CarPlay. • Vehicle’s Electrical System: Unstable power delivery from the car’s battery or electrical interruptions can cause the head unit to malfunction. Phone & App Configuration Phone Settings: • Incorrect or conflicting settings (especially Bluetooth or Wi-Fi) on your iPhone can interfere with the CarPlay link. • Third-Party Apps/Profiles: • Installed apps or configuration profiles may conflict with CarPlay’s operation. • Native apps are apple maps, apple music, audio books, apple news, podcasts, messages and phone. All other apps are considered third party apps. App Conflicts: • Running conflicting apps that require similar system resources as CarPlay can cause instability. Mobile Data Plan: • Streaming from online sources without sufficient mobile data can result in lost connectivity. Other Factors Heat & Overheating: • If either the phone or the head unit overheats, they may disable certain functions to prevent damage, leading to disconnection. User Actions: • Accidentally disconnecting the device in settings, or physically moving or bumping the phone or cable, may disrupt the connection. Remedy Guided Diagnostic Path for Apple CarPlay Connection Issues Please follow the steps below to systematically diagnose and resolve CarPlay concerns: Update Devices: • Ensure the iPhone is updated to the latest available iOS version. • Ensure the vehicle’s head unit is updated to the latest software version available. Isolate the Issue: • Check whether the symptom persists with another iPhone running the latest iOS version. • Test both wireless and wired CarPlay connections: • Does the issue only occur with wireless CarPlay?

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  Associated Documents

  • DownloadMC-11018714-0001.pdf↗
• May 30, 2025•Document ID: 11019016

  Other
  ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM

  Mfr Comm. #:

  CL - 05012025

  Date Added:

  June 3, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA is extending the warranty coverage for the Diagnostic Module for Tank Leakage detection (“DMTL”) on your vehicle from the original New Vehicle Limited Warranty of 4 years / 50,000 miles to 15 years/150,000 miles (whichever occurs first). This applies to the vehicle regardless of ownership.

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  Associated Documents

  • DownloadMC-11019016-0001.pdf↗
• May 29, 2025•Document ID: 11018701

  Service Bulletin/Repair Instructions
  SEATS

  Mfr Comm. #:

  LI91.10-P-079346

  Date Added:

  May 30, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Squeaking or creaking noises on uneven roadways, in turns, or when moving in their seat. Cause Noise in the backrest adjustment mechanism Remedy The adjustment mechanism is treated with dry lubricant spray A000 989 35 60 to rectify the noise. To do this, proceed as follows: • Move the seat to the front position and put the backrest into a lying position. • Due to the risk of soiling on the left and right under the adjustment mechanism, cover and protect the area. • Spray into the gap of the left and right adjustment mechanism with dry lubricant spray from above. • If the noise persists, then repeat the process. Enough dry lubricant spray must be used Then wait 15 minutes and leave the seat in this position! Only then adjust the seat into the sitting position. Note: Both front seats must always be treated!

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  Associated Documents

  • DownloadMC-11018701-0001.pdf↗
• May 22, 2025•Document ID: 11018582

  Service Bulletin/Repair Instructions
  ENGINE; ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI09.40-P-079339

  Date Added:

  May 27, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Fault code P2F1D01 The control unit was switched off improperly stored in ETC control unit. Cause This fault is set when there is a voltage demand from the ME, but there was no bus sleep yet. This fault can typically be ignored. It will not set a CEL and doesn't have any influence on the drivability or function of the vehicle. Remedy To clear this fault: - clear the error memory of the vehicle (at least the ETC and ME) - put the vehicle to sleep (lock and wait) and wake up (unlock) - turn ignition ON and read error memory again - DTCs shouldn´t be present in ETC - no CEL is turned ON - vehicle can be started and driven

  Associated Products (10)

  2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLA-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz GLA-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz GLA-Class2020 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11018582-0001.pdf↗
• May 22, 2025•Document ID: 11018626

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.85-P-079271

  Date Added:

  May 29, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint After a software update of HERMES communication module N112/9 has been performed on a gray import vehicle, the message "SOS - Service not activated" is displayed in the instrument cluster. Cause The message "SOS - Service not activated" tells the customer that "over-the-air" registration of the vehicle with the Mercedes Intelligent Cloud is not possible. On a gray import vehicle, this is due to the fact that the SIM card installed in the HERMES communications module cannot dial into the mobile phone network in the importing country. Remedy The only way of avoiding the message in the instrument cluster is to deactivate the HERMES module using the 09o deactivation process after obtaining the customer's consent. After deactivation, the HERMES control unit (N112/9) has the operating status "Inoperative". The message "SOS not ready" appears in the audio/COMAND display (A40/8) and may also appear in the instrument cluster. This display message tells the customer that the emergency call function is not available. In addition, the workshop must attach a label (2 x part number A9078172900 required) to the cover of the emergency call button in the overhead control panel and to the emergency call button itself. Replacing the hardware of the HERMES communication module is not effective.

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  Associated Documents

  • DownloadMC-11018626-0001.pdf↗
• May 21, 2025•Document ID: 11019018

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  LI33.30-P-056665

  Date Added:

  June 3, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to micromovement in the connection between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened and must be tightened to the specified torque. Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove outboard side shafts (extract outer joint gearing from wheel hub) 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") using Molykote and leave to dry for one hour in removed condition 4. Reinstall side shafts

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  Associated Documents

  • DownloadMC-11019018-0001.pdf↗
• May 20, 2025•Document ID: 11018532

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI47.70-P-078127

  Date Added:

  May 22, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Vehicle not AC charging. Check engine light on. PTCU/N127 with fault code P0D9100 "The lock for the charging cable has an open circuit". Cause Possible Software topic. Remedy Please open TIPS case. TIPS case: Needed customer feedback: When did the complaint/IC message occur? While driving and /or charging / or parking? If the complaint occurred while charging, how long after did the complaint/IC message occur? Which charging station was used, which provider (picture if possible)? Attach HV CUL and QT to the case Test: Verify AC charging Erase fault codes and verify if fault code P0D9100 “The lock for the charging cable has an open circuit” returns Check AV of AC charger Check the connection of the charging cable and charging socket and lock actuator – 1) yes or no? – 2) Did the failure disappear or not? Check the connection of the OBC and HV-Harness to the charging socket (unplug and plug again) – 1) yes or no 2) Did the failure disappear or not? Check the LV-connection to the locking actuator on the charging socket (unplug and plug again) – 1) yes or no? 2) any changes? Check the emergency release activation on the locking actuator – was it triggered/pulled out or not? Emergency release should be rotated back in not activated position Check for SW updates for AC charger and PTCU. SW remedy expected to be available 06/2025

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  Associated Documents

  • DownloadMC-11018532-0001.pdf↗
• May 15, 2025•Document ID: 11018625

  Warranty Program/Extension
  FUEL/PROPULSION SYSTEM

  Mfr Comm. #:

  EW - Tank Leakage

  Date Added:

  May 28, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (“MBUSA”) is extending the warranty coverage on the Diagnostic Module for Tank Leakage detection (DMTL) in certain Model Year (“MY”) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 10 years/120,000 miles (vehicles certified as LEV II) and 15 years/150,000 miles (vehicles certified as LEV III), whichever occurs first, for the following condition: • Under certain circumstances, the DMTL may trigger erroneous Diagnostic Trouble Code (DTC) entries that may result in the illumination of the Check Engine Malfunction Indicator Lamp (‘MIL’).

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  2023 Mercedes-Benz SL-Class2022 Mercedes-Benz A-Class2022 Mercedes-Benz AMG GT2022 Mercedes-Benz C-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz CLS-Class2022 Mercedes-Benz E-Class2022 Mercedes-Benz G-Class2022 Mercedes-Benz GLA-Class2022 Mercedes-Benz GLB-Class2022 Mercedes-Benz GLC-Class2022 Mercedes-Benz GLE-Class2022 Mercedes-Benz GLS-Class2022 Mercedes-Benz S-Class2022 Mercedes-Benz SL-Class2021 Mercedes-Benz A-Class2021 Mercedes-Benz AMG GT2021 Mercedes-Benz C-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz CLS-Class+ 37 more
  Associated Documents

  • DownloadMC-11018625-0001.pdf↗
• May 15, 2025•Document ID: 11018530

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI01.20-P-076894

  Date Added:

  May 21, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 – Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction Cause The partial-load ventilation valve (a part of the intake line assembly) may not work as intended. Remedy **Important** Replacement of the engine wiring harness or control unit is not needed if oil is found at the electrical connection of the crankcase ventilation valve or control unit. Replacement is only allowed if other symptoms or faults are present. Perform either remedy A or remedy B depending on the model Remedy A: SLK/SLC300, C350e hybrid, and GLC350e hybrid Perform guided test for fault code P052E71. Replace intake line assembly if necessary per results of the guided test. Software is not planned for models SLK/SLC300, C350e, and GLC350e. Remedy B: All other vehicles- (Replacement of intake line assembly is not required.) 1- Perform software update for N3/10 Engine control unit. 2- Remove upper engine cover. 3- Unclip ME-SFI control unit (N3/10) with bracket and place to one side with connected lines (see AR07.08-P-7013MRD). 4- Release and disconnect electrical connector (4) of partial-load operation crankcase ventilation valve (Y58/2). 5- Fit cap A094 545 50 03 on electrical connector (4) of engine wiring harness partial load operation crankcase ventilation valve (Y58/2) and ensure correct seating on plug of electrical connector (4). 6- Strap down electrical line (4) of partial load operation crankcase ventilation system valve (Y58/2) at wiring harness. Ensure that electrical line (4) is routed free of tension. 7- Clip in ME-SFI[ ME] control unit (N3/10) with bracket, ensure control unit is correctly seated at attachment points. New software part numbers: 2015-2017 C300 w/722.9 transmission- 2749021202 2749031506 2016-2018 C300 and GLC300 w/725 transmission- 2749021802 2749031806 2019 GLC300- 2749020802 2749031306 2017-2018 E300- 2749021902 2749031906 2019 E300- 2749020702 2749031206 This LI is in relation to NCU dated 8/31/2023 "Emission Extended Warranty – Intake Line Assembly".

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  Associated Documents

  • DownloadMC-11018530-0001.pdf↗
• May 14, 2025•Document ID: 11018365

  Service Bulletin/Repair Instructions
  EXTERIOR LIGHTING

  Mfr Comm. #:

  LI82.10-P-078470

  Date Added:

  May 15, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the HLI control unit. Cause HLI control units processing of level sensor data. Remedy Update the software for the HLI control units - starting with the left controller. After the updates, perform SCN coding of the EZS. Please ensure that the SW with the A item number A2239027738 (or newer) is used. Parts replacements will not resolve complaint. Do not replace parts. If concern is not resolved by software, please open a TIPS case and send to the Body/Chassis/Entertainment inbox. Concern does not impact drivability of the vehicle or the function of the headlights.

  Associated Products (10)

  2025 Mercedes-Benz C-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz GLC-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLE2024 Mercedes-Benz E-Class2024 Mercedes-Benz GLC-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz GLC-Class2022 Mercedes-Benz C-Class
  Associated Documents

  • DownloadMC-11018365-0001.pdf↗
• May 13, 2025•Document ID: 11018297

  Service Bulletin/Repair Instructions
  EXTERIOR LIGHTING

  Mfr Comm. #:

  LI82.10-P-078470

  Date Added:

  May 14, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT reduced range of functions" in relation to "FC151E29- The level sensor at front left has a malfunction. There is an invalid signal" in the HLI control unit. Cause HLI control units processing of level sensor data. Remedy Update the software for the HLI control units - starting with the left (driver side) controller. After the updates, perform SCN coding of the EZS. Parts replacements will not resolve complaint. Do not replace parts. If concern is not resolved by software, please open a TIPS case and send to the Body/Chassis/Entertainment inbox. Concern does not impact drivability of the vehicle or the function of the headlights.

  Associated Products (10)

  2025 Mercedes-Benz C-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz GLC-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLE2024 Mercedes-Benz E-Class2024 Mercedes-Benz GLC-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz GLC-Class2022 Mercedes-Benz C-Class
  Associated Documents

  • DownloadMC-11018297-0001.pdf↗
• May 10, 2025•Document ID: 11018627

  Service Campaign
  ENGINE

  Mfr Comm. #:

  NCU-2025040013

  Date Added:

  May 29, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the ME-SFI control unit software does not meet current production specifications. As a result, a check engine malfunction indicator lamp might erroneously be triggered.

  Associated Products (4)

  2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz CLE2024 Mercedes-Benz E-Class
  Associated Documents

  • DownloadMC-11018627-0001.pdf↗
• May 9, 2025•Document ID: 11018232

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI20.10-P-076206

  Date Added:

  May 13, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy An updated thermostat must be installed. A TIPS case must be created to order the part. Order the correct thermostat part number for your application: CLA45/GLA45: A 139200 66 02 All other M139 equipped vehicles: A 139 200 64 02 New screws must also be ordered and installed with the revised thermostat, PN N000000006341 (qty 2) will be used in place of the existing M8 screws. on the face of the thermostat. The new screws must be torqued to 8 Nm. Follow the instructions in WIS for removal and installation with the exception of the thermostat screw torque value mentioned previously. After replacement, fill and bleed the coolant system per the instructions in WIS for the model that is being worked on. QC the car on a test drive. If the complaint is remedied, release the vehicle.

  Associated Products (12)

  2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz GLA-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLA-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz GLA-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz GLA-Class2020 Mercedes-Benz CLA-Class2020 Mercedes-Benz GLA-Class
  Associated Documents

  • DownloadMC-11018232-0001.pdf↗
• May 8, 2025•Document ID: 11018211

  Emissions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  NCU-2025050001

  Date Added:

  May 9, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that certain Model Year (“MY”) 2019 – 2022 C-Class, CLS, E-Class, E-Class Coupe/Convertible, GLE/GLS-Class and AMG GT vehicles (206, 257, 213, 238,167 and 290 platforms) are potentially affected with multiple topics related to the 48V battery management system, which erroneously may or may not illuminate the check engine malfunction indicator lamp (‘MIL’) in one or more of the following circumstances: • Memory error causing battery switch to open, prohibiting vehicle to restart; • The battery thermal management system, power supply voltage (12V) measurement and 48V battery switch diagnostic may not be monitored by the OBD-system; • Plausibility check of the temperature sensor, temperature range and Real Time Clock (RTC) monitoring might not operate as intended. MBUSA will conduct an Emission Service Campaign. An authorized Mercedes-Benz dealer will update the drivetrain control unit software on the affected vehicles. Affected customers will be notified via First Class letter to have the update performed on their vehicle.

  Associated Products (27)

  2023 Mercedes-Benz AMG GT2023 Mercedes-Benz CLS-Class2023 Mercedes-Benz E-Class2023 Mercedes-Benz GLE-Class2023 Mercedes-Benz GLS-Class2022 Mercedes-Benz AMG GT2022 Mercedes-Benz C-Class2022 Mercedes-Benz CLS-Class2022 Mercedes-Benz E-Class2022 Mercedes-Benz GLE-Class2022 Mercedes-Benz GLS-Class2021 Mercedes-Benz AMG GT2021 Mercedes-Benz C-Class2021 Mercedes-Benz CLS-Class2021 Mercedes-Benz E-Class2021 Mercedes-Benz GLE-Class2021 Mercedes-Benz GLS-Class2020 Mercedes-Benz AMG GT2020 Mercedes-Benz C-Class2020 Mercedes-Benz CLS-Class+ 7 more
  Associated Documents

  • DownloadMC-11018211-0001.pdf↗
• May 7, 2025•Document ID: 11018164

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.65-P-078762

  Date Added:

  May 8, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Please note that the exact quick test conditions must be met as seen below. If not exactly as listed below, there is no need to create a TIPS case referencing this LI unless further assistance is needed outside of this document. Conditions Instrument Cluster Message: "Park Assist Inoperative" and Hardware part numbers: A0009019716 or A0009016022 B223263 with Bosch-ID C259; A+S (Active and Stored) and B223255 with Bosch-ID 1B5D; A+S (Active and Stored) Notes: • Other DTC's are permitted but the above three conditions must be met. If they are not met, this LI is not applicable. • See attachment "LI Criteria" for an example. • Attachment portrays a quick test with non-matching criteria and therefore does not require a TIPS case. Cause Under analysis. Remedy Please do not make any attempts to repair the park control unit. Do not flash or SCN code. Open a TIPS case.

  Associated Products (53)

  2025 Mercedes-Benz C-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz E-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class2024 Mercedes-Benz GLC-Class2024 Mercedes-Benz GLE-Class2024 Mercedes-Benz GLS-Class2024 Mercedes-Benz S-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz E-Class2023 Mercedes-Benz GLA-Class2023 Mercedes-Benz GLB-Class+ 33 more
  Associated Documents

  • DownloadMC-11018164-0001.pdf↗