Mercedes-Benz CLA-Class Service Bulletins

578 manufacturer communications on file.

• January 16, 2026•Document ID: 11027751

  Service Bulletin/Repair Instructions
  VISIBILITY/WIPER

  Mfr Comm. #:

  LI83.30-P-079850

  Date Added:

  January 22, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient. Cause Many possible root causes Remedy *Note - This Li does not apply if there are other Li's that apply to your concern OR you have a fault and/or guided test that leads to a root cause. AC Diagnosis (General) Initial Steps Verify Customer Concern • Confirm the issue reported by the customer. Compare to Like Vehicle • Determine if the behavior is normal by comparing with a similar vehicle. Determine Your Game and Players • Identify the diagnostic strategy and involved components/systems. Testing • Perform relevant diagnostic tests. Refrigerant Quantity • Record the amount of refrigerant recovered and compare it to the specified value (if applicable). • Forming Gas is the ONLY approved leak test method. (DYE is NOT approved) TIPS Case Submission Requirements/Warranty Claim Submission Requirements (Template attached to be used for submission of Warranty claim and/or TIPS case) Cooling Capacity Test (If System Has a Charge) *Note - TIPS case is only required if the root cause is not identified or other Li's/documents require a case to be open. Before Repairs Gauge Readings • High and Low pressure readings (from machine or separate gauges). Leak Detection (if applicable) • PPM of any leaks found. XENTRY Printouts • Climate control AVs. • HV compressor AVs (for heat and AC systems). Thermometer Readings • Left and right dash vents. • Center vent, footwell, and/or rear vents (if concern is localized). Ambient Conditions • Temperature and humidity from OCP AVs (if available). After Repairs Gauge Readings • High and Low pressure readings before and after repairs. Thermometer Readings • Left and right dash vents before and after. • Center vent, footwell, and/or rear vents before and after (if localized concern). Documentation • Complaint Analysis, Game/Players, and Testing Steps. • Include expected results and technical justification for the diagnosis. • Avoid listing R/I steps—focus on diagnostic reasoning and root cause. • All prior measurements need to be documented on the repair order. OP code usage: 831232 - Max .5 for Cooling Capacity Test 831040 - Only to be utilized if you have a fault code and are actively diagnosing that fault code (MAX 1 hour) 831762 - This includes basic leak check 831285 - This can only be used in extenuating circumstances where a leak cannot be found (MAX 1 hour)

  Associated Products (145)

  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+ 125 more
  Associated Documents

  • DownloadMC-11027751-0001.pdf↗
• January 15, 2026•Document ID: 11027682

  Service Bulletin/Repair Instructions
  VISIBILITY/WIPER

  Mfr Comm. #:

  LI83.30-P-079850

  Date Added:

  January 16, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient. Cause Many possible root causes Remedy AC Diagnosis (General) Initial Steps Verify Customer Concern • Confirm the issue reported by the customer. Compare to Like Vehicle • Determine if the behavior is normal by comparing with a similar vehicle. Determine Your Game and Players • Identify the diagnostic strategy and involved components/systems. Testing • Perform relevant diagnostic tests. Refrigerant Quantity • Record the amount of refrigerant recovered and compare it to the specified value (if applicable). • Forming Gas is the ONLY approved leak test method. (DYE is NOT approved) TIPS Case Submission Requirements/Warranty Claim Submission Requirements Cooling Capacity Test (If System Has a Charge) *Note - TIPS case is only required if the root cause is not identified or other Li's/documents require a case to be open. Before Repairs Gauge Readings • High and Low pressure readings (from machine or separate gauges). Leak Detection (if applicable) • PPM of any leaks found. XENTRY Printouts • Climate control AVs. • HV compressor AVs (for heat and AC systems). Thermometer Readings • Left and right dash vents. • Center vent, footwell, and/or rear vents (if concern is localized). Ambient Conditions • Temperature and humidity from OCP AVs (if available). After Repairs Gauge Readings • High and Low pressure readings before and after repairs. Thermometer Readings • Left and right dash vents before and after. • Center vent, footwell, and/or rear vents before and after (if localized concern). Documentation • Complaint Analysis, Game/Players, and Testing Steps. • Include expected results and technical justification for the diagnosis. • Avoid listing R/I steps—focus on diagnostic reasoning and root cause. • All prior measurements need to be documented on the repair order. OP code usage: 831232 - Max .5 for Cooling Capacity Test 831040 - Only to be utilized if you have a fault code and are actively diagnosing that fault code (MAX 1 hour) 831762 - This includes basic leak check 831285 - This can only be used in extenuating circumstances where a leak cannot be found (MAX 1 hour)

  Associated Products (140)

  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+ 120 more
  Associated Documents

  • DownloadMC-11027682-0001.pdf↗
• January 10, 2026•Document ID: 11027583

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI47.70-P-076030

  Date Added:

  January 10, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint After the charging process is complete, an instrument cluster message with a charging error appears and FC P0CFE00 is stored in control unit "N83 - AC charger for high-voltage battery (SG-LG)". The instrument cluster message and the FC memory entry can also appear at the beginning of the charging pause during delayed charging. Both only occur in combination with active pre-entry climate control. Cause Software in control unit "N83 - AC charger for high-voltage battery (SG-LG)". Remedy For model series 206 and 223 with code 802: Perform SCN coding in control unit "N83 - AC charger for high-voltage battery (SG-LG)". Please do not replace any parts even if the FC P0CFE00 coding continues to appear after successfully completing this step. A new software fix is currently in development and will likely be published in 01/2026. Replacing parts will not remedy the issue. For model series 243: The correction is already available. Perform a software update and SCN coding for the control units "N116/5 - Direct current charging connection unit (DCCU)" and "N83/11 - AC charger for high-voltage battery (SG-LG)" in order to remedy the problem.

  Associated Products (40)

  2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLE-Class2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz S-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz E-Class2024 Mercedes-Benz EQB-Class2024 Mercedes-Benz GLB-Class2024 Mercedes-Benz GLC-Class+ 20 more
  Associated Documents

  • DownloadMC-11027583-0001.pdf↗
• January 7, 2026•Document ID: 11027566

  Service Bulletin/Repair Instructions
  VISIBILITY/WIPER

  Mfr Comm. #:

  LI83.30-P-079850

  Date Added:

  January 9, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient. Cause Many possible root causes Remedy AC Diagnosis (General) Initial Steps Verify Customer Concern • Confirm the issue reported by the customer. Compare to Like Vehicle • Determine if the behavior is normal by comparing with a similar vehicle. Determine Your Game and Players • Identify the diagnostic strategy and involved components/systems. Testing • Perform relevant diagnostic tests. Refrigerant Quantity • Record the amount of refrigerant recovered and compare it to the specified value (if applicable). • Forming Gas is the ONLY approved leak test method. (DYE is NOT approved) TIPS Case Submission Requirements Cooling Capacity Test (If System Has a Charge) Before Repairs Gauge Readings • High and Low pressure readings (from machine or separate gauges). Leak Detection (if applicable) • PPM of any leaks found. XENTRY Printouts • Climate control AVs. • HV compressor AVs (for heat and AC systems). Thermometer Readings • Left and right dash vents. • Center vent, footwell, and/or rear vents (if concern is localized). Ambient Conditions • Temperature and humidity from OCP AVs (if available). After Repairs - Warranty Submission Requirements on the Repair Order Gauge Readings • High and Low pressure readings before and after repairs. Thermometer Readings • Left and right dash vents before and after. • Center vent, footwell, and/or rear vents before and after (if localized concern). Documentation • Complaint Analysis, Game/Players, and Testing Steps. • Include expected results and technical justification for the diagnosis. • Avoid listing R/I steps—focus on diagnostic reasoning and root cause. • All prior measurements need to be documented on the repair order. OP code usage: 831232 - Max .5 for Cooling Capacity Test 831040 - Only to be utilized if you have a fault code and are actively diagnosing that fault code 831762 - This includes basic leak check 831285 - This can only be used in extenuating circumstances where a leak cannot be found

  Associated Products (138)

  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+ 118 more
  Associated Documents

  • DownloadMC-11027566-0001.pdf↗
• December 19, 2025•Document ID: 11026832

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  LI27.19-P-080155

  Date Added:

  December 24, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Oil residue in connector of transmission control unit in dual-clutch transmission models 724.0 and 724.1. Cause As part of the production process, the electrohydraulic controller units are subjected to a function test in an oil bath. Any oil residue remaining in the connector area can be regarded as production process-related. Since the oil used is a non-conducting, non-corrosive medium, the oil residue does not cause any technical impairment and does not result in any consequential damage. Remedy No action or replacement of parts is required! If necessary, clean the connector using compressed air only. Do not use any cleaning agents such as brake cleaner, as this could potentially cause consequential damage!

  Associated Products (37)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLA-Class2023 Mercedes-Benz GLB-Class2022 Mercedes-Benz A-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz GLA-Class2022 Mercedes-Benz GLB-Class2021 Mercedes-Benz A-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz GLA-Class2021 Mercedes-Benz GLB-Class+ 17 more
  Associated Documents

  • DownloadMC-11026832-0001.pdf↗
• December 18, 2025•Document ID: 11026835

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.65-P-066284

  Date Added:

  December 24, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint The flap of the reversing camera opens and closes by itself during forward travel several times during the trip. No camera image is displayed in the head unit. The reversing camera or the 360° system functions normally when activated manually or by engaging drive range "R". Cause This is not a malfunction, but an intended system behavior. Calibration of the reversing camera is in progress. The calibration is completed by: • Opening the camera cover for a maximum of 5 cumulative minutes. • If the vehicle speed is < 35 km/h (<22 MPH). • The steering wheel angle is < 10°. If calibration is aborted by exceeding one of the above conditions, the camera retracts and the calibration will re-attempt once the conditions are achieved and the speed returns to the range of 18 km/h (~11 MPH). Remedy SCN code PARK213M on MFA2 facelift vehicles produced after 09/2024 (A-Class, CLA, GLA, etc...) so the complete calibration speed window is available. For vehicles with PARK213M or PARK223 a calibration is completed successfully by: • Driving forward (typically less than 1 minute). • Vehicle speed is < 35 km/h (<22 MPH). • The steering wheel angle is < 10°. • During daylight. • Without a vehicle following too closely (camera must be able to see asphalt). When calibration has completed successfully, the camera door closes automatically for the rest of the driving cycle. The camera will now only open if the customer requests (Example: Engaging reverse gear). The calibration of the camera will re-initiate every drive cycle (ignition change). The customer can generally perform calibration at the first attempt while briefly maintaining a speed range of 15 km/ h (~9 MPH) and 35 km/h (~22 MPH). The customer can therefore play a significant role in reducing the camera door noise and actuation frequency.

  Associated Products (100)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLE-Class2026 Mercedes-Benz GLS-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz GLS-Class2025 Mercedes-Benz S-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz E-Class2024 Mercedes-Benz EQB-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class2024 Mercedes-Benz GLE-Class+ 80 more
  Associated Documents

  • DownloadMC-11026835-0001.pdf↗
• December 15, 2025•Document ID: 11026610

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.30-P-080136

  Date Added:

  December 15, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint The complaint reported is that the driver display shows the message “Frunk open” although it is closed. No damage is present on the lock. The problem may occur in the following scenario: 1. Ignition on/vehicle ready to drive 2. Frunk is unlocked 3. Ignition is switched off 4. Frunk is closed. Cause After the ignition is switched off, the head unit CIVIC174 does not register that the frunk is closed. -> Software A26/17 Head Unit (CIVIC174) Remedy SW solution is being worked on. In the event of a problem, please open and close the frunk with the ignition switched on.

  Associated Products (1)

  2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11026610-0001.pdf↗
• December 11, 2025•Document ID: 11026611

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.65-P-080132

  Date Added:

  December 15, 2025

  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 (116)

  2026 Mercedes-Benz AMG GT2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLS-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-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz GLS-Class2025 Mercedes-Benz S-Class2025 Mercedes-Benz SL-Class+ 96 more
  Associated Documents

  • DownloadMC-11026611-0001.pdf↗
• December 4, 2025•Document ID: 11026500

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.00-P-080103

  Date Added:

  December 9, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint <p>A finger is permanently detected although none is present, but it is not identified (ghost function).</p><p>The result is a constant beep tone because no valid finger is detected and therefore no corresponding user profile can be assigned. </p> Cause <p>Software bug in A105 touchpad (TPAD).</p> Remedy <p>Perform software update in A105 touchpad (TPAD).</p>

  Associated Products (27)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLE-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz EQB-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLE-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz EQB-Class2023 Mercedes-Benz GLA-Class2023 Mercedes-Benz GLE-Class2022 Mercedes-Benz A-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz EQB-Class2022 Mercedes-Benz GLA-Class2022 Mercedes-Benz GLE-Class2021 Mercedes-Benz A-Class+ 7 more
  Associated Documents

  • DownloadMC-11026500-0001.pdf↗
• December 3, 2025•Document ID: 11026020

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.10-P-078888

  Date Added:

  December 3, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint The check engine light illuminates or the 48 V message is displayed in the instrument cluster Cause Fault code "P0A7F00" stored in the 48 V battery G1/3 and/or is current. Remedy 1. Perform software update: In the given problem case, update the software for the control unit G1/3 - 48 V on-board electrical system battery (48V LIB) : --> Remedy SW A0019020424 25/12 2. Carry out SOH reset routine: - Switch on ignition - Read actual value 209 in XENTRY Diagnostics at G1/3 (48 V battery) "State of Health Capacity-SOHC" Valid for OBD markets -- If the value is > 80%, no restoration process required -- If the value is < 81%, continue with the following steps Valid for non-OBD markets -- If the value is > 75%, no restoration process required -- If the value is < 76%, continue with the following steps Perform capacity restoration procedure: - Discharge 48 V battery in vehicle with ignition "On" and check SOC of 48 V battery in the instrument cluster's workshop menu - For SOC < 25%: Stop unloading and lock the vehicle with the key out of range; (bus idle) - After 1.5 h of bus idle: Charging the 48V battery - When SOC reaches or exceeds 65%, stop charging and lock the vehicle with the key out of range; (bus idle) - After 1.5 h of bus idle: Switch on ignition Read actual value 209 in XENTRY Diagnostics at G1/3 (48 V battery) "State of Health Capacity-SOHC" Valid for OBD markets - SOH > 82%: Process is complete and clear fault memory - SOH < 83%: Repeat the steps once more. If the value is still too low after 5 repetitions: Cancel healing process and provide feedback in TIPS case.

  Associated Products (26)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLA-Class2023 Mercedes-Benz GLB-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz GLA-Class2022 Mercedes-Benz GLB-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz GLA-Class2021 Mercedes-Benz GLB-Class2020 Mercedes-Benz CLA-Class2020 Mercedes-Benz GLB-Class+ 6 more
  Associated Documents

  • DownloadMC-11026020-0001.pdf↗
• November 18, 2025•Document ID: 11025646

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI68.20-P-080012

  Date Added:

  November 19, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint USB port not functioning properly. Cause Most reported USB port issues are due to improper use or contamination. Note: Any repair costs must be discussed with the customer beforehand. Common external factors identified include: • Fluid intrusion • Broken bushings or physical damage See attachments. Remedy If a component needs replacement but shows no visible external damage, submit a detailed TIPS case only when technical support is required. Include details of all connected external devices (such as charging cables, USB drives, and hard drives). If diagnostic results directly indicate component replacement, a TIPS case is not necessary.

  Associated Products (45)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLC-Class2025 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 GLC-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz S-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz CLE2024 Mercedes-Benz E-Class2024 Mercedes-Benz EQB-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLC-Class+ 25 more
  Associated Documents

  • DownloadMC-11025646-0001.pdf↗
• November 15, 2025•Document ID: 11025648

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  LI33.30-P-056665

  Date Added:

  November 20, 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 picture 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 Note: Before using the antifriction coating (Molykote), stir or shake it well (for at least 1 minute).

  Associated Products (157)

  2026 Mercedes-Benz AMG GT2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz CLE2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class2024 Mercedes-Benz AMG GT2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz CLE2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class2024 Mercedes-Benz GLC-Class2024 Mercedes-Benz GLE-Class2023 Mercedes-Benz C-Class+ 137 more
  Associated Documents

  • DownloadMC-11025648-0001.pdf↗
• November 6, 2025•Document ID: 11025544

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI68.20-P-080012

  Date Added:

  November 14, 2025

  Manufacturer:

  MERCEDES BENZ

  Summary

  Complaint USB port not functioning properly. Cause Most reported USB port issues are due to improper use or contamination. Note: Any repair costs must be discussed with the customer beforehand. Common external factors identified include: • Fluid intrusion • Broken bushings or physical damage See attachments. Remedy If a component needs replacement without visible external damage, submit a detailed TIPS case. Include information on all connected external devices (e.g., charging cables, USB drives, hard drives).

  Associated Products (67)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2025 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-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz S-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz CLE2024 Mercedes-Benz E-Class2024 Mercedes-Benz EQB-Class+ 47 more
  Associated Documents

  • DownloadMC-11025544-0001.pdf↗
• November 5, 2025•Document ID: 11025098

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI01.30-P-075439

  Date Added:

  November 6, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer may complain of a CEL on in the instrument cluster, rough running, trouble starting, issues with ECO stop/ start or a combination thereof. Cause One or more broken valve springs in the cylinder head. Remedy Run a PICO compression test before disassembling the engine for analysis. If no discrepancies are found between the cylinders with codes and those without codes, stop and open a TIPS case. If the engine serial number is past the clean point for this concern and there is a discrepancy in the PICO compression readings: stop and open a TIPS case. Include your PICO compression test results in the attachments. Cleanpoint for C43/SL43: Production date 17.11.2022 (Engine Number 13958060008852) Cleanpoint for CLA45/GLA45: Production date 19.11.2022 (Engine number 13998060037847) If nothing is found on the PICO compression test and the vehicle is after the cleanpoints above, work through the guided tests for any relevant fault codes. For misfire related fault codes this will include: • Inspect the injector performance data for abnormalities • Pull the spark plugs and inspect for cracking or damage • Using a smoke machine to inspect for air leaks Replace any damaged components found via the above tests and release the car if there are no other issues. If a discrepancy is found on the PICO compression test and the vehicle is before cleanpoint, remove the cylinder head cover and inspect the valve springs and lifters directly. If a broken valve spring is found: • Inspect the valve, rocker, retainer, and keepers on that assembly for damage. • Inspect the camshaft and camshaft lobe that operates that valve • Inspect the piston face via borescope for piston/valve contact Also perform a leak test once the valve is able to be fully seated to ensure no damage to the valve or seat has occurred. If no damage to the piston or valve seat has occurred, replace the damaged components, ALL the valve springs and release the vehicle. If valve seat or piston damage has occurred please open a TIPS case, upload the results of all tests, and outline what work has been conducted thus far.

  Associated Products (9)

  2026 Mercedes-Benz CLA-Class2024 Mercedes-Benz CLA-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-11025098-0001.pdf↗
• October 31, 2025•Document ID: 11024810

  Service Campaign
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  NCU - 2025100004

  Date Added:

  November 4, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Issue Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the 48-V on-board electrical system battery software might not meet current production specifications. A communication error may occur when reactivating the 48V lithium-ion battery during reinitialization. The system might detect and store this error, causing the malfunction indicator lamp to illuminate unnecessarily. Remedy MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update 48-V onboard electrical system battery software.

  Associated Products (20)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLA-Class2023 Mercedes-Benz GLB-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz GLA-Class2022 Mercedes-Benz GLB-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz GLA-Class2021 Mercedes-Benz GLB-Class2020 Mercedes-Benz CLA-Class2020 Mercedes-Benz GLB-Class
  Associated Documents

  • DownloadMC-11024810-0001.pdf↗
• October 29, 2025•Document ID: 11024632

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  LI35.31-P-077429

  Date Added:

  October 30, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Instrument cluster message "4MATIC inoperative". The following fault code may be present in all-wheel drive control unit N15/17: P147354 - Erroneous adaptation of the transfer case. The calibration is missing. P14759A - The coupling of the transfer case has malfunctioned. The operating conditions for the component or the system have not been fulfilled. Cause Coupling of the rear axle differential has reached the wear limit or a coupling issue is present. Remedy Please read off the part number of the rear axle differential installed on the vehicle and check the table below to determine if the differential can be repaired with a clutch repair kit. The table below is also in attachments. (If needed, check validity for further clarification of model designations). Complaint Instrument cluster message "4MATIC inoperative". The following fault code may be present in all-wheel drive control unit N15/17: P147354 - Erroneous adaptation of the transfer case. The calibration is missing. P14759A - The coupling of the transfer case has malfunctioned. The operating conditions for the component or the system have not been fulfilled. Cause Coupling of the rear axle differential has reached the wear limit or a coupling issue is present. Remedy Please read off the part number of the rear axle differential installed on the vehicle and check the table below to determine if the differential can be repaired with a clutch repair kit. The table below is also in attachments. (If needed, check validity for further clarification of model designations)

  Associated Products (24)

  2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz GLA-Class2024 Mercedes-Benz GLB-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLA-Class2023 Mercedes-Benz GLB-Class2022 Mercedes-Benz A-Class2022 Mercedes-Benz CLA-Class2022 Mercedes-Benz GLA-Class2022 Mercedes-Benz GLB-Class2021 Mercedes-Benz A-Class2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz GLA-Class2021 Mercedes-Benz GLB-Class+ 4 more
  Associated Documents

  • DownloadMC-11024632-0001.pdf↗
• October 20, 2025•Document ID: 11024407

  Service Bulletin/Repair Instructions
  VISIBILITY/WIPER

  Mfr Comm. #:

  LI83.20-P-079911

  Date Added:

  October 21, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint High-frequency cheeping or ticking when heating is requested in the instrument panel area. Cause Variable switching frequencies in the high-voltage on-board electrical system can cause vibrations that lead to noise complaints on the HV-PTC N33/16 (air heater). Remedy Note: Replacing the hardware does not solve the problem at present! Modified hardware for the HV-PTC (air heater) will be available from the beginning of 2026.

  Associated Products (1)

  2026 Mercedes-Benz CLA-Class
  Associated Documents

  • DownloadMC-11024407-0001.pdf↗
• October 20, 2025•Document ID: 11024405

  Service Bulletin/Repair Instructions
  SERVICE BRAKES

  Mfr Comm. #:

  LI42.10-P-079904

  Date Added:

  October 21, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint At low speeds and light brake pressure, brakes will make a groaning or honking noise. Cause Frictional vibrations with very light brake pressure/modulations. Remedy This condition can be duplicated on most vehicles. To validate, use a like for like reference vehicle. The noise is normal behavior under the conditions listed. With very light brake pressure this noise can be induced/caused due to normal brake pad and brake rotor vibrations. Exchanging brake components will not rectify.

  Associated Products (98)

  2026 Mercedes-Benz AMG GT2026 Mercedes-Benz CLA-Class2026 Mercedes-Benz GLA-Class2026 Mercedes-Benz GLB-Class2026 Mercedes-Benz GLC-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz EQB-Class2025 Mercedes-Benz G-Class2025 Mercedes-Benz GLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz GLS-Class2025 Mercedes-Benz S-Class2024 Mercedes-Benz AMG GT2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class+ 78 more
  Associated Documents

  • DownloadMC-11024405-0001.pdf↗
• October 13, 2025•Document ID: 11024266

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI20.10-P-076206

  Date Added:

  October 14, 2025

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer states that the CEL is lit in the instrument cluster. Various codes may be active/stored: Stored in N3/10 in model series 206, 254 or 232: P012800 - The coolant temperature is below the coolant thermostat specified temperature. and/or P01169D - Malfunction in coolant temperature sensor 1. Under temperature in the component or system. For model series 177, 118, 247 in n3/10 (only valid for M139.980 facelift (code 9U8)): P2CEF00 - Electrical fault or open circuit in coolant thermostat. and/or P011685 - Malfunction in coolant temperature sensor 1. There is a signal above the permissible limit. Cause Debris in the coolant system Remedy An updated thermostat must be installed. Order the correct thermostat part number for your application: CLA45/GLA45 with SA Code 9U8: A 139 200 66 02 CLA45/GLA45 WITHOUT SA Code 9U8: A 139 200 27 02 All other M139 equipped vehicles: A 139 200 64 02 New screws must also be ordered and used when installing thermostat A 139 200 66 02 or A 139 200 64 02 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-11024266-0001.pdf↗
• October 10, 2025•Document ID: 11024276

  Service Bulletin/Repair Instructions
  SEATS

  Mfr Comm. #:

  LI91.10-P-078305

  Date Added:

  October 14, 2025

  Manufacturer:

  MERCEDES-MAYBACH

  Summary

  Complaint The "Easy entry and exit feature" function deactivates itself after a brief period. (see attachment). Cause The cause is currently being investigated. Remedy Update the HU7 to the latest software version, then perform a factory reset of the HU7. Steps to perform factory reset: Navigate to Settings > System > Reset > Reset to factory settings and confirm. If the problem persists, please record HU7 log and also a trace of the Body CAN (For Star 2 Body Can 1 and for Star 3 Body Can 2) during the symptom and send via a TIPS case to the Telematics team. Note: Only collect and submit the log and trace if the symptom can be reliably reproduced.

  Associated Products (37)

  2026 Mercedes-Benz GLC-Class2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLA-Class2025 Mercedes-Benz GLB-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz GLS-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLA-Class2024 Mercedes-Benz GLB-Class2024 Mercedes-Benz GLC-Class2024 Mercedes-Benz GLE-Class2024 Mercedes-Benz GLS-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz GLB-Class2023 Mercedes-Benz GLC-Class2023 Mercedes-Benz GLE-Class2023 Mercedes-Benz GLS-Class2022 Mercedes-Benz A-Class+ 17 more
  Associated Documents

  • DownloadMC-11024276-0001.pdf↗