Mercedes-Benz E-Class Service Bulletins

1,085 manufacturer communications on file.

• August 15, 2026•Document ID: 11036999

  Warranty Program/Extension
  FUEL/PROPULSION SYSTEM

  Mfr Comm. #:

  CL - Tank Leak Detection

  Date Added:

  September 4, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Dear Mercedes-Benz Owner: 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. Why the Warranty extension? On certain Model Year 2018 - 2024 A / C / CLA / CLS / E / G / GLA / GLB / GLC / GLE / GLS / GT / S / SL Mercedes-Benz vehicles, 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"). Any repairs under this warranty extension must be performed by an authorized Mercedes-Benz dealership. • If your preferred authorized Mercedes-Benz dealership performs a diagnosis and confirms that your vehicle has the issue, the repair will be covered under this extended warranty and performed at no cost to you. • This extended warranty does not apply to any other components or conditions beyond the ones mentioned above, and standard warranty terms apply, including the exclusions with respect to extra expenses, as identified in the Service and Warranty Information booklet.

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  Associated Documents

  • DownloadMC-11036999-0001.pdf↗
• August 14, 2026•Document ID: 11036234

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY

  Mfr Comm. #:

  LI72.00-P-080885

  Date Added:

  August 18, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint The Dark Chrome finish on the retractable door handle appears discolored, stained, or faded. The discoloration is typically visible along the upper surface of the handle. Cause Insufficient surface treatment of the black chrome from the supplier Remedy 1.) Clean door handles. 2.) Inspect the handle after cleaning. • Confirm that the discoloration remains clearly visible across the upper portion of the handle. • Compare the condition to the LI reference photos 3.) If the discoloration matches the fault profile shown in the reference photos → replace the affected retractable door handle.

  Associated Products (4)

  2026 Mercedes-Benz E-Class2026 Mercedes-Benz S-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz S-Class
  Associated Documents

  • DownloadMC-11036234-0001.pdf↗
• August 12, 2026•Document ID: 11036229

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI01.20-P-080884

  Date Added:

  August 18, 2026

  Manufacturer:

  MERCEDES-MAYBACH

  Summary

  Complaint Oil leaks found on M176 or M177 engines diagnosed to be from the cylinder head cover area Cause Unknown (under investigation) Remedy If oil leaks are found at left or right cylinder head cover area please collect the following information and open TIPS case. 1. Collect photos of the leak 2. Include close up and wide view photos to accurately represent the location 3. Include if the vehicle has a "check oil level" Light on in the cluster or fault codes 4. Check oil level as per WIS to verify level and calculate possible oil loss from the leak 5. Identify and communicate the severity of the leak and provide supporting documentation 6. Open a TIPS case with the above information and submit to the Powertrain team for processing

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  Associated Documents

  • DownloadMC-11036229-0001.pdf↗
• August 12, 2026•Document ID: 11036192

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.10-P-080880

  Date Added:

  August 14, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer Complaint: - AC charging is not possible. - The departure time, charging pause, location-based charging or target SOC limit is automatically set to 50% or to a random value in the Mercedes me application or in the charging settings on the head unit display. (Picture 1 & 3) - Incorrect notifications appear in the Mercedes me application for charging-related functions. (Picture 2) Related DTCs in quick test: No related fault codes (DTCs) are stored in the relevant control units. CPC3 - N127 (Drivetrain control unit) OBL223_GEN4 - N83/11 (Alternating current charger for high-voltage battery) DCB223 - N116/5 - Direct current charge connection unit (DCCU) Picture1 The target SOC limit is automatically set to 50% or any random values during charging. Picture 2 Incorrect notification Example “Unable to unlock charging cable. Picture 3 Incorrect settings of charge interruption or pause. (If applicable) Cause - The Customer shares their Mercedes me credentials (password) with a third-party application, for example, a wall box application. This causes the Mercedes Benz backend server to receive random requests to reset the maximum SOC, departure time, charging pause, etc. - Charging settings are set incorrectly, for example, incorrect departure time, charging program, charging interruption/ pause, etc. Remedy The remedies below may vary depending on the customer complaint. Refer to the remedy that best matches the customer complaint. Remedy 1: The target SOC limit is automatically set to 50% or to random values during charging. - Change the Mercedes me login password on the Mercedes me homepage. (My Account > Login and Security > Reset). (Refer to Annex 1). Previously granted authorizations should then be revoked so that the charging settings can no longer be changed by external applications. Advise customers not to share the new password again. - Are there any sub-users? If yes, revoke their rights and reassess the function. -If differences between the vehicle and the Mercedes me app are visible, a new synchronization is recommended. Turn off Digital Extras through the Mercedes me app or the MMCR portal, and then turn the services on again. Remedy 2: Incorrect notifications in the Mercedes me app for charging-related functions. - Restart synchronization between the app and backend. Turn off Digital Extras through the Mercedes me app or the MMCR portal, and then turn the services on again. (Refer to Annex 2) Remedy 3: Incorrect charge interruption or pause setting. - Perform a factory reset of the head unit (A26/17). (Home > Functions > System > Reset), or turn off/correct all charging settings. (Refer to Annex 3) Additional Information: (Good to know) The LED on the charging inlet or socket indicates whether charging is completed or paused. 1) If the target SOC is reached, the charging inlet LED lights up Blue/Green without flashing. 2) If charging is paused, the charging inlet LED lights up orange without flashing. Additionally, the head unit charging settings display a charging pause. Note: Do not replace any hardware components for these complaints. If the complaint cannot be solved, please contact via TIPS or CAC.

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  Associated Documents

  • DownloadMC-11036192-0001.pdf↗
• August 12, 2026•Document ID: 11036142

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.65-P-080132

  Date Added:

  August 12, 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.

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  Associated Documents

  • DownloadMC-11036142-0001.pdf↗
• August 11, 2026•Document ID: 11036138

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.10-P-080881

  Date Added:

  August 12, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint AC and DC charging are not possible. The white LED on the charging inlet completely goes OFF after plugging in the charging cable. Related DTCs in quick test: There are no related fault codes (DTCs) stored in relevant control units. CPC3 - N127 (Drivetrain control unit) OBL223_GEN4 - N83/11 (Alternating current charger for high-voltage battery) DCB223 - N116/5 - Direct current charge connection unit (DCCU) Cause Control pilot (CP) circuit in DCB (N116/5: Direct current charge connection unit) might be not functional due to electrical overstress from EVSE (Electric Vehicle Supply Equipment | Charging Station). Remedy Refer to the charging cable actual values in DCB (N116/5). The actual value “Charging cable at charging station” and “status of pilot function” shows “Charging cable NOT PLUGGED IN” & “CP not connected” respectively, even though the charging cable is connected on both sides. This confirms a possible breakdown of Control Pilot (CP) circuit inside the DCB. Measurement of the resistance of Proximity Pilot (PP) and Control Pilot (CP) at the charging socket (G10) (see Annex “Resistance measurement Proximity Pilot (CP) and Control Pilot (CP)”)

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  Associated Documents

  • DownloadMC-11036138-0001.pdf↗
• August 7, 2026•Document ID: 11036076

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI07.10-P-080384

  Date Added:

  August 10, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer reports Check Engine Light with possible loss of power concern. The Following DTC's are present • P210185 - The throttle valve actuator has a malfunction. There is a signal above the permissible limit value. • P213500 - The values from the position sensors of the throttle valve are implausible relative to each other • P213600 - The values from position sensors "A/C" of the throttle valve are implausible relative to each other • P210B85 - The throttle valve actuator 2 has a malfunction. There is a signal above the permissible limit value. • P2AD300 - The values from the position sensors "A/G" of the throttle valve are implausible relative to each other • P2AD200 - The values from position sensors "B/G" of the throttle valve are implausible relative to each other. Cause Increased electrical resistance in pins for left and right throttle actuators. (M16/60 and M16/61) Remedy Replaced left and right throttle actuator Sockets with updated part. Silver Coated Pins 8x A 003 982 70 26 (according to wiring diagram 0,5mm) Gold Coated Pins 4x A 003 982 75 26 (according to wiring diagram 0,75mm) ELA Seals 12x A 001 545 50 80

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  Associated Documents

  • DownloadMC-11036076-0001.pdf↗
• August 6, 2026•Document ID: 11036190

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.85-P-079087

  Date Added:

  August 14, 2026

  Manufacturer:

  MERCEDES-MAYBACH

  Summary

  Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search 3.IP Radio 4.Send2Car 5.Speech Detection Service 6.Navigation 7.iHeartRadio 8.Traffic Cams Cause MB Apps is sundowned for all vehicles with NTG4.5 and NTG5 Head Unit Variant. Remedy No support available for NTG4.5 and NTG5 Head Unit Variants for MB App related topics. Note: Please do not create TIPS. Please do not replace any components. HU/Hermes SW update / SCN coding will not fix the issue.

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  Associated Documents

  • DownloadMC-11036190-0001.pdf↗
• August 6, 2026•Document ID: 11036101

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY

  Mfr Comm. #:

  LI82.62-P-078631

  Date Added:

  August 11, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment. Information: Please refer to this document in the warranty claim and, after completing diagnosis, select the damage code corresponding to the component part that caused the problem. • If the noise stops when the door trim is removed, please proceed in accordance with LI72.10-P-067691. Information: In this case, do not use a damage code for the speakers in the warranty claim!

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  Associated Documents

  • DownloadMC-11036101-0001.pdf↗
• August 5, 2026•Document ID: 11036077

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  LI27.00-P-075630

  Date Added:

  August 10, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint This document is intended as a pre-case diagnostic reference for transmission related concerns. It will also ensure that if a case is necessary, all supporting documentation is available. This should not be used on its own as justification for creating a TIPS case. Cause The root cause will vary depending on the complaint. The goal of this document is to provide diagnostic checks and procedures that may help resolve customer complaints without opening a TIPS case. Remedy Before opening a transmission-related TIPS case, the following steps must be performed to ensure all relevant data has been collected and possible remedies (when applicable) have been performed. Please Note: At minimum, the documents below must be collected before proceeding to ensure the data in its original state when the vehicle arrived is captured. - Initial Quick Test w/ Freeze frame data - VGS Control Unit Log - Initial EEPROM data (.txt format) - IPR Result (if applicable. See LI27.00-P-073124 - Transmission diagnosis using the Intelligent Predictive Repair (IPR) tool) - Transmission Heath Page If the vehicle has previously been repaired for the same concern, note the date, mileage, and TIPS case or RO number, along with a brief description of the prior work performed. IPR Guidance: The IPR recommended repair should be completed prior to following any steps in this LI and prior to case creation. IPR repairs do not require additional warranty approvals or a TIPS case to validate/confirm the results. To ensure efficient case handling, please avoid opening TIPS cases for this reason. For further information regarding IPR please see the following documents: LI27.00-P-073124 - Transmission diagnosis using the Intelligent Predictive Repair (IPR) tool Oil Pan Condition Evaluation: In some situations, IPR will advise checking the oil pan condition and determining a repair based on the evaluation. Example photos in Xentry can be found in two ways: • Use the blue hyperlink in the IPR result, and it will take you to the Condition check of transmission oil • Navigate to Xentry Bluebook > Help for control unit > Condition check of transmission oil If a different repair that what is recommended by IPR is performed, attaching photo documentation of the complaint vehicle oil pan and the IPR example to the claim is required. Reproducing the Concern: Proper evaluation of transmission concerns generally requires the condition to be reproducible. It is recommended to compare the vehicle to a similar model, if available, to help determine whether the shift behavior is characteristic of the drivetrain or uncharacteristic for the vehicle. If the concern cannot be duplicated: • A test drive with the customer may assist in understanding and reproducing the complaint. • The vehicle shift quality should be compared to a known-good vehicle with identical drivetrain and model year. • Check Shift Quality History (VGS Control Unit > Adaptations > Shift Quality History) Shift Quality History will show the last 5 noticeable harsh shifts and some of the parameters in which it occurred. You can use this to attempt recreation of the operating conditions and increase likelihood of reproducing the complaint. Complaint A: Shift Quality Note: Certain AMG variants may exhibit more firm and noticeable shift behavior as a normal characteristic. Refer to LI27.60‑P‑075147 for additional information. 1. Perform Valve flushing procedure 2. Perform 5 Torque Converter adaptions in a row - Allow the vehicle to warm up naturally, DO NOT power brake as it will increase the temperature in the torque converter. - After the 5th adaptation, collect a screen shot showing all 5 on one page 3. Perform a standstill adaption - collect a screen shot Recheck vehicle operation. If the concern has not improved, driving adaptations should be performed to target specific gear shifts.

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  Associated Documents

  • DownloadMC-11036077-0001.pdf↗
• August 4, 2026•Document ID: 11036091

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.60-P-080806

  Date Added:

  August 11, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint DAB, FM, or SDARS radio reception is limited, only a few stations are found. Cause The firmware installation was incomplete. Remedy In the A26/17 control unit "MBUX multimedia system" (head unit), use XENTRY to carry out the special process "All Modules"; this will reinstall the firmware completely.

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  Associated Documents

  • DownloadMC-11036091-0001.pdf↗
• August 4, 2026•Document ID: 11035780

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER; POWER TRAIN

  Mfr Comm. #:

  LI27.00-P-080840

  Date Added:

  August 5, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Mercedes-Benz USA is currently experiencing limited availability of transmission fluid specification ATF 236.17 due to a global supply constraint. 236.17 ATF 1L and 5L (PNs: A002989060312 and A002989060313) bottles are out of stock or in limited supply at Zep. This LI has been created with the following intention: - Provide dealers with additional workshop-focused guidance regarding the current ATF 236.17 supply constraint and the planned introduction of ATF 236.18. - Supplement existing communications and address common workshop questions related to maintenance, repairs, and fluid applicability. - Provide technical clarification and practical workshop guidance during the temporary supply constraint period. Dealers should continue to reference the latest News Channel Updates (NCUs) for the most current information regarding availability, ordering processes, supply status, and other related updates. Cause Damage to the Shell production facility has resulted in 236.17 oil supply being reduced to 50% of normal output until the end of 2026. Remedy Please first check Latest NCU updates for latest detailed information. Please continue placing orders through Paragon as normal. Supply is expected to remain reduced and allocation measures are currently in place. We ask for your patience through this restricted supply period. Most orders will be filled in the order in which they were received, as supply is replenished. Those dealers with zero inventory, and pending orders, will receive priority. We expect supply to be stabilized in September 2026. Approved Fluids: Only use transmission fluid from the approved list found on the Mercedes-Benz Operating Fluids website. Non-approved fluid will result in mechanical damage to the transmission and must be avoided. https://operatingfluids.mercedes-benz.com/sheet/236.17 Approved fluids can be claimed as follows if there is no Mercedes-Benz part number: Part # ATFSUB1L - TRANSMISSION FLUID 1 LITER ATFSUB5L - TRANSMISSION FLUID 5 LITER Dealerships with Zero Inventory AND Grounded Vehicles: If a vehicle is currently grounded for repair at your dealer due to no 236.17 inventory, we may be able to expedite your order. Please open a StarSupport ticket including the following information: (Parts Related Inquiry>National Accounts>Zep) • LI document number • Short explanation of repair needed for grounded vehicle • Current days down of RO Maintenance and Service Interval Guidance Published maintenance intervals remain unchanged. Vehicles should continue to be maintained in accordance with the applicable maintenance schedule. This LI does not revise or extend any published maintenance interval requirements. If all required parts and materials are not available prior to scheduling or beginning a transmission service, dealers should consider postponing routine preventative transmission maintenance until the necessary parts become available. For vehicles that have not yet reached the applicable maintenance interval and do not exhibit transmission-related concerns, there is no need to recommend preventative transmission services prior to the scheduled maintenance interval. When evaluating whether routine transmission maintenance can be deferred until parts become available, dealers should consider: • Overall vehicle condition • Vehicle usage and operating conditions • Presence of transmission-related symptoms or customer complaints • Customer expectations and vehicle operating requirements • Availability of required parts and materials Introduction of New Fluid Specification 236.18 Mercedes-Benz is currently preparing the introduction of ATF 236.18 as an additional approved transmission fluid solution for applicable NAG3 transmissions. At the time of publication of this LI, ATF 236.18 is not yet available for dealer ordering or workshop use in the U.S. market. See attachment for further details.

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  Associated Documents

  • DownloadMC-11035780-0001.pdf↗
• August 3, 2026•Document ID: 11035755

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  LI33.30-P-080490

  Date Added:

  August 5, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Leakage/oil leakage at drive pinion sealing ring (input shaft) (Figures 1-2) Minor leakage/slight seepage at coupling flange nut at drive pinion (Figures 3-4) Cause Damage to sealing ring during production process or insufficient use of lubricating paste during assembly of collar nut on coupling flange Remedy If any of the above-mentioned customer complaints are present, or if oil leakage or seepage is found at the front axle differential during a workshop visit, the following steps must be performed: If oil leakage is found at drive pinion sealing ring (input shaft): • Remove coupling flange from differential, AR33.30-P-0550WT • Replace drive pinion sealing ring • New collar nut (for coupling flange), part number A 221 353 03 72, on contact surface and coat the 1st thread (from contact side to coupling flange) with lubricating paste (Figures 5-6) • Install coupling flange. If oil leakage or slight seepage is found at coupling flange nut to drive pinion: • Remove coupling flange from differential, AR33.30-P-0550WT • Clean threads on input shaft • new collar nut (for coupling flange), part number A 221 353 03 72, on contact surface and coat the 1st thread (from contact side to coupling flange) with lubricating paste (Figures 5-6) • Install coupling flange.

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  Associated Documents

  • DownloadMC-11035755-0001.pdf↗
• July 31, 2026•Document ID: 11035490

  Warranty Program/Extension
  FUEL/PROPULSION SYSTEM

  Mfr Comm. #:

  EW - DMTL

  Date Added:

  August 3, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  This NCU replaces the prior NCU issued on May 15, 2025, and contains additional MY 2023 and MY 2024 vehicles which are highlighted below. 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’).

  Associated Products (69)

  2024 Mercedes-Benz GLE-Class2023 Mercedes-Benz AMG GT2023 Mercedes-Benz C-Class2023 Mercedes-Benz CLA-Class2023 Mercedes-Benz CLS-Class2023 Mercedes-Benz E-Class2023 Mercedes-Benz G-Class2023 Mercedes-Benz GLA-Class2023 Mercedes-Benz GLB-Class2023 Mercedes-Benz GLC-Class2023 Mercedes-Benz GLE-Class2023 Mercedes-Benz GLS-Class2023 Mercedes-Benz S-Class2023 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-Class+ 49 more
  Associated Documents

  • DownloadMC-11035490-0001.pdf↗
• July 27, 2026•Document ID: 11035298

  Service Bulletin/Repair Instructions
  FUEL/PROPULSION SYSTEM

  Mfr Comm. #:

  LI47.10-P-079604

  Date Added:

  July 29, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Audible "slurping" operating noise from the fuel tank Cause Conditions: • The fuel tank is around half full • The secondary chamber is almost empty. The suction jet pump suctions up small quantities of fuel and air. This results in vibrations and turbulence, which make noises. These noises may sound like slurping. The fuel pump and the drained secondary chamber amplify certain noises which can be loud or shrill. The viscosity of the fuel and the intensity of the fuel pump also impact the noises. • The fuel level is in the area of the saddle overflow in the primary chamber. The fuel mixed with air flows back into the secondary chamber. The noises may therefore be audible for longer • If the primary chamber is no longer in the area of the saddle overflow, the noises should disappear because the secondary chamber no longer receives fuel. • The area of the saddle overflow in the primary chamber is around +/- 2 liters of fuel volume (fuel gauge shows around half full). Remedy • Refill/drain approx. 5 liters of fuel; if the noise is reduced/is no longer present due to this, the circumstance specified above is present Further measures may cause a reduction in noises in the specified area: • In isolated cases, a fuel tank installed under stress may amplify the noises. The installation position of the fuel tank and the contact surfaces on the body-in-white should be checked here. To do so, release the fuel tank and refasten it, see WIS. • Replacement of component parts such as fuel tank/delivery module does not provide a remedy! If a similar noise is heard, but the tank volume is 3/4 or 1/4 and not 1/2 as described above, another circumstance is present

  Associated Products (8)

  2026 Mercedes-Benz C-Class2026 Mercedes-Benz E-Class2025 Mercedes-Benz C-Class2025 Mercedes-Benz E-Class2024 Mercedes-Benz C-Class2024 Mercedes-Benz E-Class2023 Mercedes-Benz C-Class2022 Mercedes-Benz C-Class
  Associated Documents

  • DownloadMC-11035298-0001.pdf↗
• July 27, 2026•Document ID: 11035270

  Service Campaign
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  NCU - 2026010004

  Date Added:

  July 28, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  • Always use the latest XENTRY Diagnosis software release with all available add-ons. • Make sure to follow the operation steps exactly as described in XENTRY Diagnosis! • Use a battery charger to ensure sufficient power supply of the vehicle on-board electrical system battery (greater than 12.5 V). • If XENTRY Diagnosis is already connected to the vehicle, start with operation step 2. If two or more software updates or SCN coding’s are performed during one workshop visit or SCN coding operations are performed, operation items 02-4762 and 02-5058 must only be invoiced once for each workshop order! Work Procedure: 1. Connect XENTRY Diagnosis. 2. Update engine electronics (ME) control unit software. To do so, select menu item "Quick test view → N3/10 - Engine electronics 'MED40' for combustion engine 'M274' (ME) → Adaptations → Control unit update → Update of control unit software". Then follow the user guidance in XENTRY Diagnosis. 3. Disconnect XENTRY Diagnosis.

  Associated Products (2)

  2021 Mercedes-Benz E-Class2020 Mercedes-Benz GLC-Class
  Associated Documents

  • DownloadMC-11035270-0001.pdf↗
• July 24, 2026•Document ID: 11035234

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI20.10-P-072886

  Date Added:

  July 27, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Check Engine Light ON with DTC P012800 "The Coolant Temperature is Below the Specified Temperature" active and/or stored in the ME (N3/10). There are no drivability concerns related to this complaint. Cause Root cause varies Remedy Prior to performing any repairs for this complaint: With a cold engine, pressurize the high temp coolant circuit and while it's under pressure, release the cap on the low temp coolant circuit and check if the pressure drops right away or not. If the pressure drops, the lower coolant hoses are swapped. Correct this, fill, bleed and test drive the vehicle. If the complaint returns, then continue with the steps below. IMPORTANT: Use VMI to check for the following emission extended warranty –> Engine Thermostat (incl. software update) MY19-23, Various Models and Platforms (167, 190, 205, 213, 217, 222, 223, 232, 253, 290, 463) If the vehicle is covered under the above emission extended warranty, please perform steps outlined in the accompanying NCU prior to those outlined in this document. If vehicle is not covered under the above emission extended warranty or the complaint continues to occur, then proceed as follows: Check for available software updates to the ME (N3/10). If updated software is available, perform the update, clear the DTC and the perform each of the "WARM START" and "COLD START" test drives listed below twice. If the code does not re-appear then release the vehicle. If there is no new software available OR the DTC returns after the test drives then perform the following steps: • Drain the coolant through a fine mesh sieve and check for signs of debris. Additionally, inspect the coolant reservoir for debris. If any debris is found take pictures of the reservoir and the mesh filter and "flush" the system at least 2-3 times to clear as much of the debris as possible • Replace the thermostat and bleed the system as outlined in AR20.00-P-1142-04A, evacuate the system for 20-30 minutes instead of the 5 minutes specified in step 22 • NOTE: Please use all the tools specified in the AR document. The DTC will continue to populate if the circuit is not properly bled • NOTE: There are two valid thermostats to choose from in the parts section of this LI. Please verify which PN is applicable for the vehicle being worked on via XENTRY Parts Information • After bleeding the system clear the DTC and perform each of the "WARM START" and "COLD START" test drives listed below twice. If the DTC does not reappear after the tests, release the vehicle If the ME (N3/10) software is up to date, the thermostat has already been replaced, and the complaint persists open a TIPS case and attach the following documents: • Initial quick test • ME (N3/10) control unit log • The results of an R48 test from a “yes” response and from a “no” response • Pictures of the coolant reservoir and mesh sieve (mentioned above) WARM START · Begin with the engine coolant temperature at approximately 50 degrees C · Activate the AC system, if defrost is not in use open the windows · Drive the car normally until a coolant temperature of 75 degrees C is achieved · Depress the accelerator pedal 50% for ~5 seconds (partial acceleration) · Let off the accelerator pedal and let the car coast for ~10 seconds · Continue to drive the car normally COLD START · Drive for ~7 miles (normal driving) · Shut off the engine in a parking lot (or similar), wait 30 seconds, then restart and continue driving · Depress the accelerator pedal 50% for ~5 seconds (partial acceleration) · Let off the accelerator pedal and let the car coast for ~10 seconds · Continue to drive the car normally

  Associated Products (72)

  2026 Mercedes-Benz AMG GT2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz GLS-Class2026 Mercedes-Benz S-Class2026 Mercedes-Benz SL-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz GLE-Class2025 Mercedes-Benz GLS-Class2025 Mercedes-Benz S-Class2025 Mercedes-Benz SL-Class2024 Mercedes-Benz AMG GT2024 Mercedes-Benz G-Class2024 Mercedes-Benz GLC-Class2024 Mercedes-Benz GLE-Class2024 Mercedes-Benz GLS-Class2024 Mercedes-Benz S-Class2024 Mercedes-Benz SL-Class2023 Mercedes-Benz AMG GT2023 Mercedes-Benz C-Class+ 52 more
  Associated Documents

  • DownloadMC-11035234-0001.pdf↗
• July 17, 2026•Document ID: 11035230

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.60-P-080806

  Date Added:

  July 27, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint After an "Over the Air" update (OTA), FM or SDARS radio reception is limited; only a few stations are found. Cause The firmware installation was incomplete. Remedy In the A26/17 control unit "MBUX multimedia system" (head unit), use XENTRY to carry out the special process "All Modules"; this will reinstall the firmware completely.

  Associated Products (23)

  2026 Mercedes-Benz AMG GT2026 Mercedes-Benz C-Class2026 Mercedes-Benz CLE2026 Mercedes-Benz E-Class2026 Mercedes-Benz GLC-Class2026 Mercedes-Benz SL-Class2025 Mercedes-Benz AMG GT2025 Mercedes-Benz C-Class2025 Mercedes-Benz CLE2025 Mercedes-Benz E-Class2025 Mercedes-Benz GLC-Class2025 Mercedes-Benz SL-Class2024 Mercedes-Benz AMG GT2024 Mercedes-Benz C-Class2024 Mercedes-Benz CLE2024 Mercedes-Benz E-Class2024 Mercedes-Benz GLC-Class2024 Mercedes-Benz SL-Class2023 Mercedes-Benz C-Class2023 Mercedes-Benz GLC-Class+ 3 more
  Associated Documents

  • DownloadMC-11035230-0001.pdf↗
• July 17, 2026•Document ID: 11035120

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; STEERING

  Mfr Comm. #:

  LI46.10-P-078012

  Date Added:

  July 21, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Hand detection system – malfunction / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" "Active steering assist not available" Cause Possible causes: Hand detection mat, hand detection control unit, contacts, and electrical feed line. Remedy In the event of a customer complaint and fault code in IDC control unit: U186B29 in IDC223 or fault code U0429E0, U042941, U042929, U042902, U0429E1 in IDC213 or fault code in HOSWD control unit: B1E7614 Check: Please do not replace the HOSWD control unit. Please flash the new SW and perform the SCN coding for the HOSWD control unit (N179/1) (available from July 2026). The software can be flashed onto all HOSWD213 with HW number A0009011522 and all HOSWD223 with HW number A0009011422. Please also flash the SW for the IDC control unit (N62/4), if possible (only applies to HOSWD223). Erase fault memory Remedy: Turn on the ignition or start the engine without touching the steering wheel. If, after 10 seconds without touching the steering wheel, one of the three fault messages appears on the instrument cluster: Check the contacts and feed lines in the steering wheel by means of a visual inspection for damage, crimp connections, loose connections, etc. (example in picture 2 and 3). If there is visible damage -> replace the steering wheel electronics or the feed lines. If there is not any visible damage -> replace the steering wheel rim. If a yellow message does not appear on the instrument cluster within 10 seconds: Grasp the steering wheel fully with both hands, including the chrome molding at the 6 o'clock position (see picture 1). If the fault is triggered by grasping the steering wheel rim or pressing the clip at the 6 o'clock position, check the contacts and feed lines in the steering wheel by means of a visual inspection for damage, kinked connections, loose connections, etc. (example in picture 2 and 3). Check the ground connections (screw connections and cables to the steering wheel rim); if necessary, retighten the screws/bolts and check for corrosion (picture 4). If there is visible damage -> replace the steering wheel electronics or the feed lines. If there is not any visible damage: Replace the steering wheel rim. Please do not replace the HOSWD control unit. A TIPS case should be created if fault profile is unclear. In the event of a customer complaint and a further fault code in HOSWD: B1E7713: Check the ground connections (screw connections and cables to the steering wheel rim); if necessary, retighten the screws/bolts and check for corrosion (picture 4). B1F1F04: Check the control unit of the hand detection system; if necessary, replace this with the control unit from a donor vehicle (make sure that the hardware part numbers are identical).

  Associated Products (19)

  2021 Mercedes-Benz A-Class2021 Mercedes-Benz AMG GT2021 Mercedes-Benz CLA-Class2021 Mercedes-Benz CLS-Class2021 Mercedes-Benz E-Class2021 Mercedes-Benz GLA-Class2021 Mercedes-Benz GLB-Class2021 Mercedes-Benz GLE-Class2021 Mercedes-Benz GLS-Class2021 Mercedes-Benz S-Class2020 Mercedes-Benz A-Class2020 Mercedes-Benz AMG GT2020 Mercedes-Benz CLA-Class2020 Mercedes-Benz CLS-Class2020 Mercedes-Benz E-Class2020 Mercedes-Benz GLA-Class2020 Mercedes-Benz GLB-Class2020 Mercedes-Benz GLE-Class2020 Mercedes-Benz GLS-Class
  Associated Documents

  • DownloadMC-11035120-0001.pdf↗
• July 14, 2026•Document ID: 11035005

  Service Bulletin/Repair Instructions
  POWER TRAIN

  Mfr Comm. #:

  LI35.30-P-058566

  Date Added:

  July 14, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. 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 cracking of the microweld 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. See also LI33.20-P-078406 Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove side shafts 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") with Molykote and leave to dry for "one hour" in removed condition 4. Reinstall side shafts Note: Before using the antifriction coating (Molykote), stir it or shake it thoroughly for (at least 1 minute).

  Associated Products (287)

  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+ 267 more
  Associated Documents

  • DownloadMC-11035005-0001.pdf↗