2022 Mercedes-Benz C300 technical service bulletins
395 technical service bulletins and manufacturer communications cover the 2022 Mercedes-Benz C300, including 4 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...
- 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...
- Wheezing noises/squeaking noises from the front shock absorbers when passing over surface undulations and...
- Oil seeping from turbocharger oil return line at connection to engine block
- 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
- Radio station cover art does not refresh when switching stations
- 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
- Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious
- The Apple Music app is no longer available in the head unit apps menu after updating the software of the...
- Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G‑TRONIC automatic...
- During part of the steering movement, it feels heavier or more difficult to steer in the same spot every time
- • Harsh 1‑2, 2‑3, and/or 3‑4 shift • Jerky shifting • Jolting when accelerating from stop
- Tailgate opens unintentionally
- Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed,...
- 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...
- During cold starting, a tortoise symbol may be displayed in the event of reduced engine output
- A popup is seen on the HU with the message "data connection temporarily not available". Potentially...
- 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...
- DAB, FM, or SDARS radio reception is limited, only a few stations are found
- Audible "slurping" operating noise from the fuel tank
- After an "Over the Air" update (OTA), FM or SDARS radio reception is limited; only a few stations are found
- 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,...
- We are experiencing intermittent issues when flashing A26/17
- 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...
- Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed,...
- Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop...
- The remaining time shown on the instrument cluster in the workshop menu (days to next due service) is...
- Rattling/knocking noise from the rear axle steering is audible when driving on rough terrain or cobblestones
- After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the...
- 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,...
- 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...
- Play/noise at height adjuster or in seat guide rail on front seats
- 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
- No heating output is available during electric driving operation
- Optical irregularity in the light guide of the ambient lighting
- SRS indicator light illuminated in the instrument cluster
- -Check engine light illuminated
- The "easy entry and exit feature" function deactivates itself after a brief period
- Radio station cover art does not refresh when switching stations
- Customer concern for ESP/Brake or Steering yellow instrument cluster message AND C220564 in the N80...
- 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...
- Engine vibrations perceived at low rpm
- 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"
- Electrical system
- Stored DTC C220564
- Tailgate opens unintentionally
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- Engine
- Unknown or other
- Check engine light on with the following fault is current in the VGS Control Unit: P084300 Oil pressure...
- The vehicle cannot disengage “P” (Park), and a red warning message appears in the instrument cluster
- Activating Navigation Please Wait" message seen on central display
- Electrical system
- Complaint: Clattering noise from area of hood with steel suspension
- Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz...
- 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...
- After the charging process is complete, an instrument cluster message with a charging error appears and FC...
- (Original LI document #: LI27.35-P-079039) Clicking noises from the electro-hydraulic control unit (EHS)...
- Engine idle fluctuates or stumbles at approximately 7 second interval
- 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...
- Displayed Message: “Driver camera not functioning, see Operator’s Manual”
- After the charging process is complete, an instrument cluster message with a charging error appears and FC...
- USB port not functioning properly
- The shift from 1st to 2nd gear may be uncomfortable under light load
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- Possible complaints about shift quality, issues with learning the park lock, and slipping/rinse entries in...
- A harsh 5-4 downshift can be felt during deceleration while braking or coasting
- Harsh 2-1 downshifts when coming to a stop with ECO start-stop function turned OFF. Note: When ECO...
- Electrical system
- At low speeds and light brake pressure, brakes will make a groaning or honking noise
- The "Easy entry and exit feature" function deactivates itself after a brief period
- The result from the XENTRY battery test does not match the current state of the battery
- Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick...
- Seal secured to B-pillar trim on rear doors cracked in upper area, see picture 1.
- Electrical system
- The Apple Music app is no longer available in the head unit apps menu after updating the software of the...
- Metallic clattering/noise from the area of the dashboard on uneven roads
- No audio is output either in radio mode, or with media playback via app, Bluetooth or USB. In such cases,...
- Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT...
- Clattering noise from area of hood with steel suspension
- Wheezing noises/squeaking noises from the front shock absorbers when passing over surface undulations and...
- Message in Instrument Cluster for "Active Distance Assist not enabled, but can be purchased subsequently"...
- Criteria: • Customer concern for ESP/Brake or Steering yellow instrument cluster message
- Valeo Steering Column Module (N80) goes into bootloader after updating software to A2239028729
- Electrical system
- Complaint
- Fuel filler flap/socket flap sticks, cannot be opened
- The "Easy entry and exit feature" function deactivates itself after a brief period
- Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has updated driver assistance system...
- Diverse functional limitations in the vehicle in combination with various warning and fault messages in...
- Electrical system
- Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has updated driver assistance system SCN...
- Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position...
- In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the...
- Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT...
- Electrical system
- After the charging process is complete, the IC message with charging error appears and the FC P0CFE00 is...
- 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...
- In vehicles with the MBUX multimedia system Gen20x.i2 without premium sound system and external amplifier,...
- Symptoms relating to CIVIC A26/17
- Headlamp, front fog lamp leaky or fogged
- Headlamps leaking or fogged
- Air bags
- A popup is seen on the HU with the message "data connection temporarily not available". Potentially...
- The "Easy entry and exit feature" function deactivates itself after a brief period
- Random heating of air conditioning system
- A clicking/ticking/taping noise from underneath the vehicle with engine off during ECO stop event or after...
- Electrical system
- The message "Device detected at diagnostics connection See Owner’s Manual" appears sporadically in the...
- 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...
- Check engine light on. Engine in limp-home mode
- Electrical system
- During a phone call, the called party has difficulty understanding/cannot understand the driver, or...
- Red oil pressure warning in instrument cluster One of the below fault codes is stored in powertrain...
- The flap of the reversing camera opens and closes by itself during forward travel several times during the...
- Customer-perceived problem: • Fuel gauge reading implausible • MIL ON (market-dependent) N118/3 Fault...
- Electrical system
- Electrical system
- Red cooling system malfunction warning due to overheat
- Noises/ squealing from the service brake in various driving situations and ambient conditions
- • Hard 1-2 shift • Jerky shifting • Jolting when moving off
- Electrical system
- 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
- Noise from area of instrument panel Noise might occur in the following conditions
- Complaint
- Fuel door may require several attempts to open
- 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)
- The remaining time shown on the instrument cluster in the workshop menu (days to next due service) is...
- When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the...
- Electrical system
- Engine idle fluctuates or stumbles at approximately 7 second interval
- 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...
- Engine warning light active
- Check engine light illuminated
- Low engine oil level warning
- Electrical system
- The flap of the reversing camera opens and closes by itself during forward travel
- After a control unit replacement of "N112/9
- Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick...
- Rear lamps fogged up/not leaktight
- • Transfer of selected user-defined scene/ animation (Mercedes-Benz Phone App) from HU to ECU software...
- When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the...
- 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...
- Engine idle fluctuates or stumbles at approximately 5-10 second intervals
- Engine is making abnormal noise at idle
- Washer fluid system leaks
- During cold starting, a tortoise symbol may be displayed in the event of reduced engine output
- Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT...
- Combustion engine could no longer be started, only electric driving possible
- "Active Emergency Stop Assist Currently Unavailable" and "Active Steering Assist Inoperative" instrument...
- Check engine light on. One of the below fault codes is current in the engine control module (N3/10)
- Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during...
- This document applies to vehicles of model series 206 and 254 from SOP (start of production) with NTG7,...
- Play/noise at height adjuster or in seat guide rail on front seats
- Tension-releasing impact of the propeller shaft with the force-free in D "KID" function, after vehicle has...
- Cause The following conditions can occur on vehicles with a disconnected on-board electrical system...
- Display dark (total or partial) of one or more ASCM (AMG) steering wheel button displays
- When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the...
- Check engine light on. Fault code P207273
- 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
- Indentations in the roof paneling in row bow areas
- Transfer of selected user-defined scene/ animation (MeApp) from HU to ECU software fails to start
- Headlamp or front fog lamp leaky or fogged
- Headlamps fogged or droplets forming
- 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
- When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the...
- Digital light pop-up messages (warnings, notes, spotlight and dyn
- Yellow Coolant warning comes on in cluster Fault codes below are current or stored in MED41 P0A0500- The...
- Check engine light on and fault code P019185 current or stored in MED41 control unit
- Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G-TRONIC automatic...
- Complaints about shift quality in vehicles of MODEL 205, 212 and 222 with TRANSMISSION 724.2.
- When the pre-entry climate control was activated via Mercedes me connect App, the driver no longer had...
- USB port data storage medium is not recognized, but charging function is still available
- Noticeable vibrations at the steering wheel: • At speeds between 40mph and 75mph • On straight stretches...
- In the instrument cluster, the symbol for "12 V battery" and the message "Switch on vehicle" may...
- The driver's seat memory settings do not synchronize with the driver's user profile as described in the...
- Engine oil seeping from right rear of engine at upper area of timing case cover
- • Red display in the Charging indicator status in MBUX during AC Charging
- Electrical system
- In the instrument cluster, the symbol for "12 V battery" and the message "Switch on vehicle" may...
- Electrical system
- Electrical system
- Wireless Media Interface: Smartphone cannot be charged or charging process is interrupted
- The display in the Lower Multifunction Steering Wheel Button Group (A74/2) may be completely or partially...
- 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
- Seal, B-pillar trim on rear doors cracked in upper area, Production deviation at supplier of B-pillar trim
- 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
- 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
- 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
- Seal, B-pillar trim on rear doors cracked in upper area, see picture 1. Production deviation at supplier...
- Mercedes me connect services inoperative (me-Call, Remote Status, etc.). Mercedes me services
- Electrical system
- Wheezing noises from the front shock absorbers when passing over surface undulations and rough road
- The "SOS nonfunctional" message appears sporadically in the instrument cluster of the vehicle
- 12V message in IC when starting the vehicle
- Electrical system
- In the instrument cluster, the symbol for "12 V battery" and the message "Switch on vehicle" may...
- Phone call log is not shown in the MBUX display
- When operating a control point to open the trunk lid or the tailgate, the trunk lock unlocks, but there is...
- Noise at front seats between seat-back lining and function carrier
- Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during...
- Electrical system
- Left and/or right front door could scuff or jamb when opening/closing in the rear upper area at the...
- Electrical system
- Station logos are no longer displayed in the radio after updating or SCN coding the A26/17 head unit
- Brief connectivity interruptions when using Apple CarPlay over Wi-Fi, for example when driving underneath...
- Play/noise at seat height adjuster or in seat guide rail on front seats
- Loads induced at the steering wheel through pushing and pulling actions may
- Wireless charging start/charging behavior of iPhone 14 is not optimal
- Traffic Light View is intermittently inoperable after updating the MBUX Multimedia System (A26/17) to E316.5.
- The display in the Lower Multifunction Steering Wheel Button Group (A74/2) may be completely or partially...
- Message in IC: "Active Brake Assist function restricted". "Active Emergency Stop Assist inoperative"...
- Staining on door trim strips and top and bottom trim elements on rear side windows
- Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during...
- Customer may state that the image in the central display is distorted or pixelated (see attached photos)
- Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position...
- Power steering unavailable following engine start, warning message in instrument cluster
- When attempting to open the trunk lid or the tailgate, the trunk lock unlocks, but there is no actuation...
- The
- Beanstandung
- The glass panel of the Panoramic Sliding Sunroof may not open/close when actuated via the slider of the...
- Traffic Light View is intermittently inoperable after updating the MBUX Multimedia System (A26/17) to E316.5.
- The vehicle sporadically may not unlock via the radio remote control or Keyless Go. The vehicle may...
- Check engine light is illuminated Fault code stored P012867- The coolant temperature is below the coolant...
- Thumping noise on rear axle shock absorber on rough road
- Customer may have one or more of the following complaints: • Vehicle location is shown incorrectly in the...
- Electrical system
- Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during...
- There is a rhythmic thumping noise coming from the front end during braking
- In the "single color" setting, it is not possible to select the color for the ambient lighting
- The vehicle level at the front and/or rear axle may be out of specification after measurement with a...
- Customer may state that the wrong curve direction arrow is shown in the instrument cluster (driver) display
- Customer states that the Radio and/or Media menus are not available in the driver display Note: Both menus...
- Noise from the front seats between seat-back lining and seat cover
- The touchpad dimming function does not work and the search lighting is either at maximum brightness or...
- Adjustment of the outside mirrors using the driver's door switch group may not be possible or it is not...
- The fault code C112502 is logged (as current or stored) in the rear axle control unit (N68/4).
- • Call of seat position memory nonfunctional • Seat cushion fore/aft adjustment nonfunctional
- Model series 206: Front seat heating nonfunctional
- MY15+ M278 and M157 Equipped Vehicles with Fault Code ""P023400 – Boost Pressure is Too High"" "
- Instrument Cluster warnings when Driver's door opened"
- The Weather App will not populate local weather data based on current vehicle position.
- Fuel filler flap opens slowly/switch flashes/tank is bleeding instrument cluster warning
- Intermittently after bus sleep the lower control panel LCP and upper control panel UCP may be panel UCP...
- Touch pad: Search lighting does not dim or does not turn on.
- Remote start causing CEL and U012600.
- Disturbed Antenna Signal.
- Navigation system permanently displays "Activating".
- Map pocket on front seat backrest trim does not close.
- Reset the customer-specific data and perform a software update of the AUDIO20 control unit.
- Headlamp fog.
- Traffic information service and posibly the voice control, nonfunctional after navigation software update.
- Cd/dvd
- High voltage battery warning message in instrument cluster.
- Gasket may settle causing a slight oil leak.
- Window lifter and outside mirror on passenger side malfunction after replacement of door control unit.
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