2021 Mercedes-Benz AMG Cla45 technical service bulletins
242 technical service bulletins and manufacturer communications cover the 2021 Mercedes-Benz AMG Cla45, 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...
- Slight creaking noises when steering
- Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is...
- Radio station cover art does not refresh when switching stations
- Clanking noise from the area of the speakers in the doors
- Noises/ squealing from the service brake in various driving situations and ambient conditions
- Temporary no start condition with check engine light and multiple warning messages
- Intermittent shift feel or thud/clunk noise perceived, such as a brief jerk or transmission reaction...
- Customers may report one or more of the following: • Transmission malfunction message • Check engine light...
- Tailgate opens unintentionally
- 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active...
- Customers may report one or more of the following: • Transmission malfunction message • Check engine light...
- CEL light on with no drivability concerns
- 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)
- CEL light on with no drivability concerns
- Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop...
- 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
- There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper...
- There may be creaking noises when steering while stationary or driving slowly
- Noises at the front axle when cornering or maneuvering (video files attached) Note: Save video files...
- 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
- Engine
- Headlamp, front fog lamp leaky or fogged
- Engine
- The "easy entry and exit feature" function deactivates itself after a brief period
- Radio station cover art does not refresh when switching stations
- The vehicle's position on the map is displayed far away from its actual position, e.g. the vehicle is...
- Yellow information message in driver display (instrument cluster): "Switch on motor to charge the 12V battery"
- Engine
- Tailgate opens unintentionally
- Unknown or other
- Activating Navigation Please Wait" message seen on central display
- After the charging process is complete, an instrument cluster message with a charging error appears and FC...
- Noises from the rear axle differential, particularly when cornering slowly
- 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
- Oil residue in connector of transmission control unit in dual-clutch transmission models 724.0 and 724.1.
- The flap of the reversing camera opens and closes by itself during forward travel several times during the...
- A finger is permanently detected although none is present, but it is not identified (ghost function)
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- USB port not functioning properly
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- Customer may complain of a CEL on in the instrument cluster, rough running, trouble starting, issues with...
- Electrical system
- Instrument cluster message "4MATIC inoperative". The following fault code may be present in all-wheel...
- At low speeds and light brake pressure, brakes will make a groaning or honking noise
- Customer states that the CEL is lit in the instrument cluster
- The "Easy entry and exit feature" function deactivates itself after a brief period
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- 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...
- No audio is output either in radio mode, or with media playback via app, Bluetooth or USB. In such cases,...
- The Dynamic or Park Camera button in the LCP is stuck or does not react
- Customer complains about anti-theft alarm system triggering without obvious cause when the vehicle is...
- Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy An...
- Customer complaints regarding automatic transmission 724.1 (8FDCT & 8FDCT hybrid) For faster, more...
- Complaint: Check engine light comes on when driving/starting the vehicle
- Noises/ squealing from the service brake in various driving situations and ambient conditions
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- Check engine light comes on when driving/starting the vehicle
- Vibrations in steering at speeds lower than 50 km/h when turning left and right or while at a stop
- After a software update for instrument cluster (IC) control unit (N133/1) is performed the following...
- There may be creaking noises when steering while stationary or driving slowly
- Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy An...
- The head unit cannot be operated via the steering wheel buttons on the right side
- Noises from the rear axle differential, particularly when cornering slowly
- Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy An...
- MBUX head unit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or...
- In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the...
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- Fault code P2F1D01 The control unit was switched off improperly stored in ETC control unit
- Please note that the exact quick test conditions must be met as seen below
- Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy An...
- 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...
- Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system
- Headlamp, front fog lamp leaky or fogged
- Headlamps leaking or fogged
- The message "Device detected at diagnostics connection See Operator’s Manual" appears sporadically in the...
- The message "Device detected at diagnostics connection See Owner’s Manual" appears sporadically in the...
- Random heating of air conditioning system
- Noises/ squealing from the service brake in various driving situations and ambient conditions
- Check engine light comes on when driving/starting the vehicle
- Front right tire pressure sensor sporadically or permanently not detected
- Electrical system
- During a phone call, the called party has difficulty understanding/cannot understand the driver, or...
- 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...
- The engine warning light illuminates or the 48 V message is displayed in the instrument cluster
- Electrical system
- Electrical system
- Electrical system
- Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy...
- Symptoms with driver display and/or central display
- 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)
- Electrical system
- There may be creaking noises when steering while stationary or driving slowly
- Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant system Remedy...
- The vehicle's position on the map is displayed far away from its actual position, e.g. the vehicle is...
- Power train
- Service Campaign 2024110007: Please visit an authorized Mercedes-Benz dealer where they will replace the...
- Please visit an authorized Mercedes-Benz dealer where they will replace the rear axle flex disk, free of...
- After a software update, the MBUX multimedia system (A26/17) may incorrectly display the fault code...
- 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...
- Washer fluid system leaks
- After clicking on the "Radio" selection function, the radio does not start and instead a permanent loading...
- Noises/ squealing from the service brake in various driving situations and ambient conditions
- Individual functions such as sliding sunroof or roller sunblind can no longer be operated using the...
- Headlamp or front fog lamp leaky or fogged
- Headlamps fogged or droplets forming
- 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 the CEL is lit in the instrument cluster Cause Debris in the coolant systemRemedy...
- Rear lamps fogged up/not leaktight
- Customer states that the CEL is lit in the instrument cluster Debris in the coolant system Remedy Please...
- Electrical system
- Vibrations in steering at speeds lower than 50 km/h, possible when turning both in and back, also partly...
- In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the...
- This is to notify you of the Service Campaign OTA update for the MBUX system software in 750,313 Model...
- Customer states that the CEL is lit in the instrument cluster Debris in the coolant system Please refer to...
- Tailgate opens unintentionally
- The radio station favorites list is no longer present after bus idle Saving process during download...
- After clicking on the "Radio" selection function, the radio does not start and instead a permanent loading...
- Electrical system: software
- Electrical system
- 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
- Customer complains about anti-theft alarm system triggering without obvious cause when the vehicle is...
- Electrical system
- Electrical system
- Crease formation on genuine leather seat covers in vehicles with low mileage ⢠Objects left on the seats...
- Electrical system
- The "SOS nonfunctional" message appears sporadically in the instrument cluster of the vehicle
- Electrical system
- Engine and engine cooling
- Cracking and creaking noise from area of inner B-pillar when driving on rough terrain
- In the MBUX weather app, the temperature is displayed in the wrong unit (Fahrenheit instead of °C, or vice...
- Ambient lighting malfunctions sporadically, mainly in the Ocean Blue color value and with animation "ON"....
- Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position...
- Squeaking noise from area of input shaft of electric steering
- Customer may complain of a CEL on in the instrument cluster, rough running, trouble starting, issues with...
- Customer states after a bus sleep the SiriusXM category changes from "My Favorites" to "All...
- Vibrations in steering at speeds lower than 30 mph
- Engine and engine cooling
- Complaint
- Noises from the area of the steering column
- The Apple Carplay interface cannot be controlled via the center console touchpad or the right-hand...
- Equipment
- Electrical system
- Equipment: other: owners/service/other manual
- Electrical system
- Volume and bass level too low
- Structure
- Fault message (yellow) in instrument cluster and TPM warning lamp
- Staining at top and bottom of trim bars of doors
- Brake squeal from front axle when braking to a standstill
- Equipment
- Model series 118, 177, and 247 with M139 engine and wi- thout code 810
- MY15+ M278 and M157 Equipped Vehicles with Fault Code ""P023400 – Boost Pressure is Too High"" "
- MBUX multimedia system: Map data does not match with your system/the navigation system cannot be activated
- Spare wheel.
- MBUX multimedia system control .
- Mounting support could be cracked.
- Upon selecting navigation, the central display may show the following message: "Map data does not match...
- The customer may note that the Dashcam feature is inoperable with one of the following complaints.
- On vehicles with code 077 HERMES dummy module the following functions are restricted, unavailable.
- Transmission does not shift into reverse.
- The customer may note that the Dashcam feature is inoperable with one of the following complaints
- M17x.xxx Check Engine Light on with Misfire DTC's
- Complaint: Height adjustment of electric steering column adjustment jams in upper / lower adjustment...
- Check engine light on and FC P146264 sto- red in engine and fuel pump control units
- Communication errors with control unit AWD_M- FA2
- Parktronic inoperable.
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