Mercedes-Benz S-Class Service Bulletins

741 manufacturer communications on file.

• April 28, 2026•Document ID: 11031658

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI07.61-P-080241

  Date Added:

  April 29, 2026

  Manufacturer:

  MERCEDES-MAYBACH

  Summary

  Complaint CEL ON with DTC P061197 "the control unit fuel injector has a malfunction output stage fault of control unit is restricted" active and stored in the ME (N3/10). There are no drivability concerns related to the complaint. Cause ME (N3/10) software Remedy Perform the following checks: • Clean the ground points of N3/10 and the ignition coils (W11/3 and W25) • Check the plugs of the ECU and the wiring to all 8 injectors • Perform a smoke test for the intake and exhaust system • Check the catalysts via borescope • Perform the guided tests in XENTRY for the 4 lambda sensors • If the above checks are OK then swap injectors 1 and 6. Then code them into their new positions in the ME. Clear the codes and QC after. If the complaint is no longer present after the above steps the car can be released to the customer. Optimized software is in development and expected to be released via XENTRY in Q2 2026.

  Associated Products (5)

  2025 Mercedes-Benz S-Class2024 Mercedes-Benz S-Class2023 Mercedes-Benz S-Class2022 Mercedes-Benz S-Class2021 Mercedes-Benz S-Class
  Associated Documents

  • DownloadMC-11031658-0001.pdf↗
• April 24, 2026•Document ID: 11031555

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY

  Mfr Comm. #:

  LI72.20-P-080324

  Date Added:

  April 25, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Trunk lid lock may not unlock when the trunk lid handle (S88/8) is operated The trunk lid can still be opened using the following methods: • HFA (Hands-Free Access) • Unlocking and opening the trunk from inside with the emergency release • Trunk lid remote operating switch at the drivers door • Press and hold the "Trunk lid" button on the SmartKey Cause Under analysis Remedy Check switching signal of trunk lid handle (S88/8) during operation and document results by providing print out of actual values. Submit a TIPS case with fault description and observations. • send to the Body/Chassis/Entertainment inbox.

  Associated Products (4)

  2025 Mercedes-Benz S-Class2024 Mercedes-Benz S-Class2023 Mercedes-Benz S-Class2022 Mercedes-Benz S-Class
  Associated Documents

  • DownloadMC-11031555-0001.pdf↗
• April 24, 2026•Document ID: 11031553

  Emissions
  ELECTRICAL SYSTEM; ENGINE

  Mfr Comm. #:

  Emissions - 2026020006

  Date Added:

  April 25, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles equipped with an 8-cylinder engine, the software of the engine control unit may not correspond to the current specifications. Under specific conditions, the OBD system may not detect an aged catalyst, which could impair the engine’s ability to adjust the catalyst heating, potentially resulting in increased exhaust emissions. MBUSA will conduct an emission service campaign. An authorized Mercedes-Benz dealer will update the engine control unit software on the affected vehicles.

  Associated Products (3)

  2019 Mercedes-Benz AMG GT2019 Mercedes-Benz E-Class2019 Mercedes-Benz S-Class
  Associated Documents

  • DownloadMC-11031553-0001.pdf↗
• April 24, 2026•Document ID: 11031558

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  LI00.01-P-078887

  Date Added:

  April 25, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

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

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  Associated Documents

  • DownloadMC-11031558-0001.pdf↗
• April 21, 2026•Document ID: 11031581

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI20.10-P-072886

  Date Added:

  April 27, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint CEL ON with DTC P012800 "The Coolant Temperature is Below the Specified Temperature" active and stored in the ME (N3/10). There are no drivability concerns related to the 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 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 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 an emission extended warranty, Please perform steps outlined in the NCU for repairs. If vehicle is not covered under an emission extended warranty, 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, flush the system several 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 • 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 there is no new software available, the thermostat has already been replaced, and the DTC returns 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 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

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  Associated Documents

  • DownloadMC-11031581-0001.pdf↗
• April 17, 2026•Document ID: 11031367

  Service Bulletin/Repair Instructions
  SUSPENSION

  Mfr Comm. #:

  LI33.20-P-078406

  Date Added:

  April 17, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. MUST match noise for proper diagnosis. NOTE: Steering functionality is not affected. Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Axle Half Shaft noise when changing direction - Front) LI33.30-P-056665 (Axle Half Shaft noise when changing direction - Rear) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present after re-testing: • If 192/232 chassis, verify FIN is in the listed range below in "Operation B" and perform. • If not 192/232 chassis or vehicle is a 192/232 not in the listed FIN range, additional verifications of where the noise is coming from are needed. Use multiple channel NVH method to narrow down location. Verify the LI's listed above were completed or if there are other similar noises associated with the chassis (Example: 192/232 also has under panel noises and an associated LI). Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease) (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range): Only affects vehicles up to FIN end number: • Model series 192: xxx xxx xx 002 876 • Model series 232: xxx xxx xx 022 312 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.

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  Associated Documents

  • DownloadMC-11031367-0001.pdf↗
• April 16, 2026•Document ID: 11031359

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI47.70-P-078563

  Date Added:

  April 17, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Engine diagnosis indicator lamp (MIL) lights up. The vehicle starts or charges normally and without any problems. Current and saved fault code in DCCU and powertrain control unit (PTCU): • P2E9873 The position sensor of the external socket flap of the vehicle socket (direct current) indicates an electrical fault. The actuator does not open. Cause Software in the control unit "N116/5 - DC charge-connection unit (DCCU)". Remedy Update software for N116/5 (DC charging control unit box) and perform SCN coding of N116/5. • Once the SCN coding has been updated, the engine diagnosis indicator lamp (MIL) is no longer actuated with this fault code.

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  Associated Documents

  • DownloadMC-11031359-0001.pdf↗
• April 16, 2026•Document ID: 11031580

  Service Bulletin/Repair Instructions
  EXTERIOR LIGHTING

  Mfr Comm. #:

  LI82.10-P-078301

  Date Added:

  April 27, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

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

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  Associated Documents

  • DownloadMC-11031580-0001.pdf↗
• April 14, 2026•Document ID: 11031358

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  LI07.61-P-080241

  Date Added:

  April 16, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint CEL ON with DTC P061197 "the control unit fuel injector has a malfunction output stage fault of control unit is restricted" active and stored in the ME (N3/10). There are no drivability concerns related to the complaint. Cause ME (N3/10) software Remedy Perform the following checks: • Clean the ground points of N3/10 and the ignition coils (W11/3 and W25) • Check the plugs of the ECU and the wiring to all 8 injectors • Perform a smoke test for the intake and exhaust system • Check the catalysts via borescope • Perform the guided tests in XENTRY for the 4 lambda sensors • If the above checks are OK then swap injectors 1 and 6. Then code them into their new positions in the ME. Clear the codes and QC after. If the complaint is no longer present after the above steps the car can be released to the customer. Optimized software is in development and expected to be released via XENTRY at the end of Q1 2026

  Associated Products (5)

  2025 Mercedes-Benz S-Class2024 Mercedes-Benz S-Class2023 Mercedes-Benz S-Class2022 Mercedes-Benz S-Class2021 Mercedes-Benz S-Class
  Associated Documents

  • DownloadMC-11031358-0001.pdf↗
• April 8, 2026•Document ID: 11031201

  Service Bulletin/Repair Instructions
  AIR BAGS

  Mfr Comm. #:

  LI91.60-P-076303

  Date Added:

  April 8, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint SRS indicator light illuminated in the instrument cluster. Electrical fault in the rear airbag/window airbag that may cause a connection between the airbag pins or to the vehicle mass Cause Contact problems that create a short circuit between the pins or to the vehicle ground Remedy Connect and disconnect the affected airbag five times Then the squib must be carefully blown out with dry compressed air. Caution: There must be no mechanical contact! If fault is not rectified: Please measure the internal resistance as described in SI91.00-P-0005A. If the resistor of the airbag is OK, please replace the airbag plug. If the resistance of the airbag is not OK, please replace the airbag. Important: The electrical fault does not affect the functionality of the airbag in the event of an accident. The airbag is functioning as intended.

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  Associated Documents

  • DownloadMC-11031201-0001.pdf↗
• April 7, 2026•Document ID: 11031202

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; VISIBILITY/WIPER

  Mfr Comm. #:

  LI72.40-P-071889

  Date Added:

  April 8, 2026

  Manufacturer:

  MERCEDES-MAYBACH

  Summary

  Complaint When closing the door, the side window may remain slightly open (short stroke position). Automatic window raising function of side window inoperative. NOTE: Window is fully operational while holding the switch Cause Software in door control unit (N69/x). Starting the engine at the same time as the door is closing (short stroke closure of window lifter) may result in a denormalization of the window lifter system. Remedy Update the software in the affected door control unit (N69/x). • This requires the door control unit (N69/x) to be commissioned. • (Path: XENTRY Scope; Control units view; DCU-XX (N69/x); Adaptations; Commissioning) Availability of the repair software in the field organization: • Since 10.10.2020 for model series 238, 257, 217 (FACELIFT) and A/C205 (FACELIFT) • Since 12.04.2021 for model series 118

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  Associated Documents

  • DownloadMC-11031202-0001.pdf↗
• April 2, 2026•Document ID: 11031256

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; STRUCTURE:BODY

  Mfr Comm. #:

  LI72.20-P-075746

  Date Added:

  April 10, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EXAMPLE: when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double-clicking on the button instead. This reduces the likelihood of the button being activated accidentally or unintentionally. The recoding can be carried out as follows: 1. Add SA Code O19 into VeDoc (O for Oscar, not "zero") • an XSS ticket may be necessary to add the SA code 2. Perform SCN coding of EIS N73 control unit 3. Deactivate the vehicle key (a successful deactivation is indicated by the LED lighting up 2x briefly and then 1x for a long period). 4. Place the vehicle key in the storage compartment on the key symbol and turn on the ignition. IMPORTANT: all other vehicle keys must be outside the recognition range of the vehicle when doing this! Perform steps 3 and 4 successively for all vehicle keys. Notes: 6th, 7th and 8th generation keys can be deactivated as follows: Up to modification year 22/1 by double clicking the "Lock button" As of modification year 22/1, by press and holding the “Lock button", then double‑click the “Unlock button" at the same time. On model series 167, the storage compartment with the key symbol is located in the armrest. The SCN coding from the EZS is only transferred correctly to the vehicle key under the following conditions: Only one vehicle key is located in the vehicle, this key has been deactivated and it is positioned on the marking in the storage compartment for the data transfer. The costs for this adaptation are to be borne by the customer.

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• April 2, 2026•Document ID: 11031255

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI54.71-P-079104

  Date Added:

  April 10, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the following scenarios: • Flashing without a speed limit ("- -"). • Flashing when current vehicle speed is under speed limit. • Flashing between US speed limit symbol and European speed limit symbol. NOTE: • Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. • This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy No TIPS case is necessary. Do not replace parts. A new software for the head unit is scheduled for tentative release in Q2 2026.

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  Associated Documents

  • DownloadMC-11031255-0001.pdf↗
• March 27, 2026•Document ID: 11030303

  Other
  ENGINE; SERVICE BRAKES

  Mfr Comm. #:

  CL - EW M157

  Date Added:

  March 30, 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 on the pressure transducer, vacuum pump, and vacuum lines in 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. On certain Model Year 2015 - 2019 CLS, E-Class, G-Class, GLE, GL, GLS, ML, SL and S-Class vehicles with the "M 157" 8-cylinder engine, over time, the pressure transducer and vacuum pump might not continue to work as intended and could result in illumination of the check engine Malfunction Indicator Lamp ('MIL') and the activation of limp-home mode. Any repairs under this warranty extension must be performed by an authorized Mercedes-Benz dealership. •If your preferred authorized Mercedes-Benz dealership performs diagnosis and confirms that your vehicle meets the criteria for this extended warranty, the repair will be covered at no cost to you. •This extended warranty does not apply to any other components or conditions beyond the ones described under this extended warranty, 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-11030303-0001.pdf↗
• March 27, 2026•Document ID: 11030298

  Service Bulletin/Repair Instructions
  STEERING

  Mfr Comm. #:

  LI46.80-P-079280

  Date Added:

  March 28, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Rattling/knocking noise from the rear axle steering is audible when driving on rough terrain or cobblestones. Excessive radial play (green arrows) between the screw-on stud (1) and the plain bearing (2). Cause Diverse functional play in the rear axle steering. Remedy 1. Detach underfloor paneling under rear axle steering. 2. Remove heat shield. 3. Remove large clamps from left bellows. 4. Open small clamps on left using a suitable tool and slide to the side. 5. Slide bellows to the side. 6. A second person sits in the vehicle and, with the drive activated and the automatic transmission in the N position, turns the steering to left lock. Caution! Risk of trapping when steering at the same time! Do not move steering wheel during operation steps 7 and 8! 7. Remove grease from screw-on stud using a clean, lint-free rag. => Up to the area where the stud enters the bearing! Then completely degrease the threaded stud using a lint-free cloth soaked in a suitable assembly cleaner (e.g., A 000 986 56 01); if necessary, clean hard-to-reach areas with the assembly cleaner. => Up to the area where the stud enters the bearing! Important: The surface must be thoroughly cleaned and free of grease! 8. Then apply Hylomar (A 001 989 25 20 09) around the degreased screw-on stud using a new brush. => Up to the area where the stud enters the bearing! 9. Move steering wheel from end stop to end stop 1-2 times. Then, turn the steering to the left lock again. Warning! Risk of trapping when steering at the same time! 10. Apply Hylomar a second time. 11. Move steering wheel from end stop to end stop 1-2 times. Then, turn the steering to the right lock. Warning! Risk of trapping when steering at the same time! 12. Bellows installation: Coat contact surfaces of bellows and rack-and-pinion steering lightly with Renolit (A094 989 38 00). When doing so, ensure that the grease is underneath the edges of the bellows. Replace large clamps (A 001 995 15 35). The small clamp can be reused. 13. Repeat operation steps 3 to 5 on the other (right) side. 14. Then repeat operation steps 7 to 12 for the screw-on stud on the other side. 15. Attach heat shield. 16. Attach underfloor paneling. 17. When relocating the vehicle on the premises, please use Snow Chain Mode through the head unit to limit speed so Hylomar application stays in place. 18. Leave the Hylomar to dry for approx. 90 minutes. Note: Deactivate Snow Chain Mode after stopping the vehicle! 19. Then perform a test drive. If the remedies are not effective => please create a TIPS case to the Body/Chassis/Entertainment with the following information: • Complete history of the rear axle steering with mileage and repair date along with what was completed (application of Hylomar, replacement of the rear axle steering). • Clear video or audio file of the complaint as perceived by the customer (without amplification via Chassis Ear or similar devices and not on the shock absorber test stand).

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  Associated Documents

  • DownloadMC-11030298-0001.pdf↗
• March 25, 2026•Document ID: 11030299

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI46.10-P-079374

  Date Added:

  March 28, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Customer concern for ESP/Brake or Steering yellow instrument cluster message AND C220564 in the N80 Steering Column Control Module (Valeo Parts only). To check which supplier steering column module is present in the vehicle, see attachment "Supplier Identification". Cause Triggered due to communication related software timing. Remedy New software A2239026336. Update N80 (Steering Column Module) to at least target software A2239026336, clear codes, and ignition cycle the vehicle. If DTC is still present, re-flash N80 and clear DTC's. Is DTC still present? No --> Bus sleep the vehicle. After bus sleep check for DTC again. If DTC is not present, release vehicle. Yes --> Open a TIPS case to the Body/Chassis/Entertainment inbox.

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  • DownloadMC-11030299-0001.pdf↗
• March 25, 2026•Document ID: 11030301

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  LI00.01-P-078887

  Date Added:

  March 28, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

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

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  • DownloadMC-11030301-0001.pdf↗
• March 23, 2026•Document ID: 11030300

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY; ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI80.20-P-078308

  Date Added:

  March 28, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Depending on the identified problem (items 1-4), please implement the corresponding Remedy below (items 1-4): 1. KeylessGo sensor surfaces do not respond. Door handles can extend/retract if the key is used for locking/unlocking. No particular fault code. 2. Surface-flush door handle fails to retract and/or extend. One or more of the following fault codes are current and stored: B185D96; B185E96; B186196; B186296 The following values are present in the control unit log (A17/x): Motor_bridge_connection_fatal_error = True (for example, see attachment) OR Motor_bridge_wrong_direction_fatal_error = True (for example, see attachment) 3. Surface-flush door handle fails to retract and/or extend. One or more of the following fault codes are current and stored: B185D96; B185E96; B186196; B186296 The following values are present in the control unit log (A17/x): Motor_init_error_for_sensors = True (for example, see attachment) 4. Surface-flush door handle fails to retract and/or extend. The fault code B185911 is stored in the DCU (N69/X). Cause 1. Software bug. 2. Software robustness. 3. Software robustness. 4. The motor resistance is outside the tolerance range. Remedy Depending on the identified Complaint above (items 1-4), please implement the corresponding remedial actions (items 1-4): 1. Perform a reset of the corresponding 'KEYLESS GO' door handle control unit (A17/x) via XENTRY (for example see attachment) add-on is available (add-on 32204 for XENTRY version 06/25) Please use one of the following damage codes: 8213H73; 8219773; 8213K73; 8219873 2. Please process the guided fault check via XENTRY (Add-on 32485 for XENTRY version 06/25; Add-on 32486 for XENTRY version 09/25). In the event of a proposed SCN coding, it must be carried out and the faults must then be cleared. Please use one of the following SSLs: 8213H73; 8219773; 8213K73; 8219873 3. Please process the guided fault check via XENTRY (Add-on 32485 for XENTRY version 06/25; Add-on 32486 for XENTRY version 09/25). In the event of a proposed renewal of the bearing bracket, the corresponding bearing bracket must be replaced. Please use one of the following SSLs: 80A0D73; 80N0D73; 80N0E73; 80A0E73 4. The motor resistance is too low. Bearing bracket must be replaced. Please use one of the following SSLs: 80A0D73; 80N0D73; 80N0E73; 80A0E73 Please note that other published GI documents may also be valid for assessing the problem. For example: "LI72.10-P-074316 Flush-Mounted Door Handle Jams When It Is Pulled Out". Please also refer to SI72.00-P-0014A in WIS. If after the remedy points above are performed, the problem is still present, please submit a TIPS case to the PTS-Body/Chassis/Entertainment inbox. → In this case, store the damaged parts for further analyses.

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  2026 Mercedes-Benz E-Class2025 Mercedes-Benz E-Class2025 Mercedes-Benz S-Class2024 Mercedes-Benz E-Class2024 Mercedes-Benz S-Class2023 Mercedes-Benz S-Class2022 Mercedes-Benz S-Class2021 Mercedes-Benz S-Class
  Associated Documents

  • DownloadMC-11030300-0001.pdf↗
• March 19, 2026•Document ID: 11030159

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.85-P-080359

  Date Added:

  March 19, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Mercedes me connect services inoperative (me-Call, Remote Status, etc.). Mercedes me services - activation not possible Notes: - The event code "B16AC00 - The configuration of the SIM card is erroneous" is active and stored - The head unit shows no internet connection Cause The RAMSES module may be faulty. This fault profile can be recognized as follows: With XENTRY Diagnosis, enter the "ACTUAL values" menu of the RAMSES control unit and read out the values with position 175 and 727. ACTUAL values in the event of a fault: Type of mobile service (position 175): No reception Operating mode (position 727): Ready mode Remedy If B16AC00 is permanently active and saved and position 175 is no reception and position 727 is ready mode, it is highly likely that the communication module is faulty. In this case, an initial start up must be carried out. If the problem persists even after an initial start up, please create a TIPS case.

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  • DownloadMC-11030159-0001.pdf↗
• March 19, 2026•Document ID: 11030157

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  LI82.85-P-077914

  Date Added:

  March 19, 2026

  Manufacturer:

  MERCEDES-BENZ

  Summary

  Complaint Mercedes me connect services inoperative (me-Call, Remote Status, etc.). Mercedes me services - activation not possible Notes: - The event code "B129C00 - Malfunction in control unit for telematics services" is active and stored - The head unit shows no internet connection Cause Under analysis. Remedy Please create a TIPS case, attach a RAMSES control unit log to the case.

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  • DownloadMC-11030157-0001.pdf↗