2021 Mercedes-Benz S 500 technical service bulletins
301 technical service bulletins and manufacturer communications cover the 2021 Mercedes-Benz S 500, including 3 warranty extensions.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz...
- Fuel/propulsion system
- In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the...
- Diverse functional limitations in the vehicle in combination with various warning and fault messages in...
- Sporadic warning message in instrument cluster "Engine oil pressure, stop switch off vehicle" (or similar)...
- Customer complaints relating to automatic transmission 725.0 (NAG3 Classic /9G‑TRONIC automatic...
- Slight creaking noises when steering
- CEL illuminates and/or AC does not blow cold
- A software update will be performed that provides enhancements to the robustness and system stability of...
- Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is...
- Dear Dealer Partners, The part numbers listed in the chart below should no longer be installed and any...
- Issue after OTA Update IC Odometer Reading blank("_ _ _ _") IC Maintanence data unavailable
- Red coolant warning in instrument cluster
- Whining / humming noises (described as foghorn‑like) from the drivetrain in the rear axle area during...
- Only vehicles with a variable transfer case are affected
- Clanking noise from the area of the speakers in the doors
- Issue On certain subject vehicles, software for the communication module does not meet the current series...
- Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious
- Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed,...
- Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G‑TRONIC automatic...
- Cause Internal failure of the scroll wheel within the AC compressor
- During part of the steering movement, it feels heavier or more difficult to steer in the same spot every time
- Tailgate opens unintentionally
- The following most common complaints may be observed: • Brief connectivity interruptions when using Apple...
- 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active...
- This document is intended as a pre-case diagnostic reference for transmission related concerns
- Mercedes-Benz USA is currently experiencing limited availability of transmission fluid specification ATF...
- Leakage/oil leakage at drive pinion sealing ring (input shaft) (Figures 1-2) Minor leakage/slight seepage...
- Crackling and cracking noise from the outer wheel on the front axle when cornering
- Hand detection system – malfunction / vehicles with code 266 Fault message in instrument cluster: "Active...
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious
- Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements...
- Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed,...
- General information on the operation of the PRE-SAFE® Impulse system: The PRE-SAFE® Side Impulse system is...
- 1. "Perform vehicle handover" in the workshop menu to start the maintenance computer for service A/B...
- For awareness, after SW update of control unit, IC223, on models 223 and 297, seat belt lamp and chime...
- Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed,...
- The remaining time shown on the instrument cluster in the workshop menu (days to next due service) is...
- Noises from the area of the steering column
- Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed,...
- • Driver's seat and/or front passenger seat cannot be adjusted
- 48V battery (A66) part numbers A 000 982 78 24, A 000 982 57 30, A 000 982 88 31, A 000 982 50 32, A 000...
- There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper...
- One or more seat functions are restricted or inoperative
- The part numbers listed in the chart below should no longer be installed, and any existing stock must be...
- 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active...
- Cause At present, there are no known noise problems with the steering column
- The intent of
- Headlamp, front fog lamp leaky or fogged
- SRS indicator light illuminated in the instrument cluster
- Rattling/knocking noise from the rear axle steering is audible when driving on rough terrain or cobblestones
- Customer concern for ESP/Brake or Steering yellow instrument cluster message AND C220564 in the N80...
- Depending on the identified problem (items 1-4), please implement the corresponding Remedy below (items...
- Mercedes me connect services inoperative (me-Call, Remote Status, etc.). Mercedes me services
- Mercedes me connect services inoperative (me-Call, Remote Status, etc.). Mercedes me services
- The vehicle's position on the map is displayed far away from its actual position, e.g. the vehicle is...
- Headlamp, front fog lamp leaky or fogged
- The seat may no longer be adjustable using the electric seat adjustment switch on the door module
- Yellow information message in driver display (instrument cluster): "Switch on motor to charge the 12V battery"
- Stored DTC C220564
- Please perform the corresponding remedy measures (points 1-4) depending on the determined problem (points...
- Tailgate opens unintentionally
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- Check engine light on with the following fault is current in the VGS Control Unit: P084300 Oil pressure...
- Red ring displayed around vehicle when front or rear camera door actuates
- Customer states the AC either does not cool/has poor performance or heat is insufficient
- Customer states the AC either does not cool/has poor performance or heat is insufficient
- For the potentially affected vehicles, excessively high aging of the battery was calculated at cold...
- (Original LI document #: LI27.35-P-079039) Clicking noises from the electro-hydraulic control unit (EHS)...
- After the charging process is complete, an instrument cluster message with a charging error appears and FC...
- The flap of the reversing camera opens and closes by itself during forward travel several times during the...
- After the charging process is complete, an instrument cluster message with a charging error appears and FC...
- USB port not functioning properly
- Possible complaints about shift quality, issues with learning the park lock, and slipping/rinse entries in...
- At low speeds and light brake pressure, brakes will make a groaning or honking noise
- The result from the XENTRY battery test does not match the current state of the battery
- Power train
- Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick...
- Concern 1
- Electrical system
- Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has updated driver assistance system SCN...
- In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the...
- It remains dark when switching on the rear passenger compartment interior lighting
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- Harsh shift feeling followed immediately by "Suspension Malfunction" on instrument cluster and accompanied...
- Rattling/knocking noise from the rear axle steering is audible when driving on rough terrain or cobblestones
- Please note that the exact quick test conditions must be met as seen below
- Individual functions such as sliding sunroof or roller sunblind can no longer be operated using the...
- Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument...
- Electrical system
- Headlamp, front fog lamp leaky or fogged
- Headlamps leaking or fogged
- Random heating of air conditioning system
- Interference or static noise from speakers when driving
- The last settings for the Augmented Reality Head-up Display (AR HUD) may not always be saved and the...
- Electrical system
- A clicking/ticking/taping noise from underneath the vehicle with engine off during ECO stop event or after...
- Complaint
- A) Wind noise in area of rear edge of rear fixed element of panoramic sliding sunroof (EPC item...
- The overhead control panel can have various complaints, e.g.: • Failure of overhead control panel lighting...
- If a door is opened, the color of the footwell lamp under the front seats on one of the two sides does not...
- A squeaking noise comes from the electric power steering; see video with example
- The luggage compartment lighting switches off and back on erratically if the tailgate is opened with the...
- No airflow or ventilation from the rear blower regardless of input from rear controller, tablet or front...
- Electrical system
- During a phone call, the called party has difficulty understanding/cannot understand the driver, or...
- Check engine light illuminated Fault code present in MRG3 control unit P22C800 or P22C900
- Update Digital Operator's Manual
- Customer-perceived problem: • Fuel gauge reading implausible • MIL ON (market-dependent) N118/3 Fault...
- Noises/ squealing from the service brake in various driving situations and ambient conditions
- For the potentially affected vehicles, excessively high aging of the battery was calculated at cold...
- Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements
- Please visit an authorized Mercedes-Benz dealer where they will check the wiring of the lens hood of the...
- Fuel door may require several attempts to open
- If TRANSMISSION 725.1 (9G TRONIC FACELIFT) exhibits any "shift quality" problem symptoms, various...
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- Station logos are no longer displayed in the radio after updating or SCN coding the A26/17 head unit
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- Electrical system
- Play noticeable in the height adjustment of the steering column
- Electrical fault on rear airbag/window airbag
- The vehicle's position on the map is displayed far away from its actual position, e.g. the vehicle is...
- Electrical system
- Low engine oil level warning
- Check engine light illuminated Fault code present in MRG3 control unit P22C900
- Electrical system
- After a control unit replacement of "N112/9
- Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick...
- Engine cooling fan running for an extended time after switching off vehicle
- Rear lamps fogged up/not leaktight
- Only vehicles with a variable transfer case are affected
- -Check engine light(MIL) is ON. -Current and stored fault code in DCCU and PTCU : P2E9873 The position...
- Washer fluid system leaks
- • The flush-mounted door handle could jam when it is pulled out and may move in a jerky manner when doing...
- Following the software update of the MBUX, the tablet can no longer be connected with the rear seat unit
- When driving on rough ground, there may be noises from the 4-way head restraint of the front seats
- Combustion engine could no longer be started, only electric driving possible
- "Active Emergency Stop Assist Currently Unavailable" and "Active Steering Assist Inoperative" instrument...
- Tension-releasing impact of the propeller shaft with the force-free in D "KID" function, after vehicle has...
- Unknown or other
- Display dark (total or partial) of one or more ASCM (AMG) steering wheel button displays
- Individual functions such as sliding sunroof or roller sunblind can no longer be operated using the...
- Damage or discoloration to paint protection films on vehicle
- Headlamp or front fog lamp leaky or fogged
- To insure vehicle down time is kept at a minimum and all required information is available when case is...
- Headlamps fogged or droplets forming
- 1. Connect XENTRY Diagnosis
- Electrical system
- Vehicle not AC charging
- The oil level is not correctly displayed while the instrument cluster display is in workshop mode
- Once the head unit A26/17 is updated to the FUP4 software release E445.0, it may be the case that online...
- Customer states that wireless Apple Carplay does not initiate at start-up. The MBUX Display states "Apple...
- Radio reception interference and the following DTCs are displayed in the A26/17
- Digital light pop-up messages (warnings, notes, spotlight and dyn
- Child seat detected message is shown in the central display and no child seat is installed on the front...
- Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G-TRONIC automatic...
- USB port data storage medium is not recognized, but charging function is still available
- • Red display in the Charging indicator status in MBUX during AC Charging
- An MBUX System software update is available for your vehicle that includes functional improvements for...
- Electrical system
- Electrical system
- A Communication Module software update is available for your vehicle that allows for future remote...
- The update of the RAMSES 1.1 module to the SW version E139.4 results in a fault in the vtime of the module...
- This is to notify you of the Service Campaign OTA update for the MBUX control unit software in 14,559...
- The following symptoms may be present in the instrument cluster: 1. "Perform vehicle handover" in the...
- Tailgate opens unintentionally
- Electrical system
- Change in the login procedure for the payment service in the integrated toll system
- Electrical system: software
- Electrical system: software
- Updating the RAMSES 1.1 module to the latest SW-version E139.4 will lead to an error in the modules vtime...
- The steering wheel generates grinding noises between the steering wheel and steering column switch module...
- Noises in the steering column area when steering
- Front armrest cap (butterfly compartment) only opens when pressed strongly
- Electrical system
- Electrical system
- Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles, has released a software update for...
- Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles, has released a software update for...
- Electrical system
- Electrical system
- No audio is output either in radio mode, or with media playback via app, Bluetooth or USB. In such cases,...
- Electrical system
- Control unit N68
- Crease formation on genuine leather seat covers in vehicles with low mileage ⢠Objects left on the seats...
- Electrical system
- Electrical system
- Mercedes me connect services inoperative (me-Call, Remote Status, etc.). Mercedes me services
- Electrical system
- Following a software update of the head unit to FUP3 variant 316.5 or higher, the "Residual heat" button...
- The "SOS nonfunctional" message appears sporadically in the instrument cluster of the vehicle
- Electrical system
- Electrical system: software
- 12V message in IC when starting the vehicle
- On vehicles with a low mileage, it may be the case that the displays in the rear passenger compartment do...
- Electrical system
- With the adaptations from modification year 802 to modification year 803, the illumination of the...
- Phone call log is not shown in the MBUX display
- The Mercedes me connect services cannot be activated
- Flush door handle needs to be pulled on with increased force in order to open the door manually
- Electrical system
- 1. "Perform vehicle handover" in the workshop menu to start the maintenance computer for service A/B...
- Electrical system
- Electrical system
- Static noises from speakers while driving (see video labeled example of noise)
- Brief connectivity interruptions when using Apple CarPlay over Wi-Fi, for example when driving underneath...
- Update Digital Operator's Manual and enclose printed Operator's Manual, replace if necessary Model 223
- The surface-flush door handle sometimes does not retract when the vehicle is locked
- Traffic Light View is intermittently inoperable after updating the MBUX Multimedia System (A26/17) to E316.5.
- Customer states that they are unable to actuate the rear-door roller sunblinds via the MBUX settings
- Message in IC: "Active Brake Assist function restricted". "Active Emergency Stop Assist inoperative"...
- Forward collision avoidance
- Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position...
- Steering
- Fuel system, gasoline
- Replace steering column switch module
- Creaking noise from side bolster when load applied to seat cushion of front seats
- Door handles selectively do not extend due to engagement of "anti-play" mode
- Door handles do not extend when pressed, use key to extend door handles and follow prescribed steps.
- Supply printed operator's manual and replace if necessary
- Following a software update of the MBUX multimedia system (A26/17), the MBUX tablet can no longer be...
- Correct torque of screw connection between hydraulic lines and all suspension struts
- Customer may have the following complaints: • Mobile device will not connect to the vehicle's WLAN network...
- The warning message “PRE-SAFE inoperative” shown on IC display
- • The flush-mounted door handle could jam or skip while extending and may move in a jerky manner while...
- The range of the integrated garage door opener (GTO) is too short
- Sporadic warning message in instrument cluster "Engine oil pressure stop switch off vehicle" (or similar)...
- MY15+ M278 and M157 Equipped Vehicles with Fault Code ""P023400 – Boost Pressure is Too High"" "
- Update signal acquisition and actuation module front control unit software
- Retrofit rubber mounting for mobile phone cradle in front center console
- The mobile phone address book may not be transferred completely to the multimedia system COMAND, Audio 20,...
- Important new emission service campaign information.
- Clattering noise when raising lowering window using the front door window
- Flushmounted door handle may be sluggish when retracting.
- Fuel filler flap opens slowly/switch flashes/tank is bleeding instrument cluster warning
- The "Ambient Light Warning Assistance Inoperative" warning message is displayed in the instrument cluster...
- The rear entertainment system displays may flicker see attached.
- The flushmounted door handles are retracted and do not extend electrically in response to a command from...
- Touch pad: Search lighting does not dim or does not turn on.
- Navigation system permanently displays "Activating".
- High voltage battery warning message in instrument cluster.
- Gasket may settle causing a slight oil leak.
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