2020 Mercedes-Benz GLB 250 technical service bulletins
240 technical service bulletins and manufacturer communications cover the 2020 Mercedes-Benz GLB 250, 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
- 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...
- Tailgate opens unintentionally
- 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active...
- 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
- 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...
- 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 may be creaking noises when steering while stationary or driving slowly
- Wind noises in area along the top of windshield at speeds above 60mph
- 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
- -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
- 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
- Yellow information message in driver display (instrument cluster): "Switch on motor to charge the 12V battery"
- Tailgate opens unintentionally
- After the charging process is complete, an instrument cluster message with a charging error appears and FC...
- 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...
- 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...
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- Displayed Message: “Driver camera not functioning, see Operator’s Manual”
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- USB port not functioning properly
- 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
- 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...
- Bulging and contact of the rear spoiler when hatch is opened (picture 1-1). When opening the rear hatch,...
- 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
- To prevent the wiper motor from overheating, the wipe frequency is reduced automatically when a dry...
- Customer complains about anti-theft alarm system triggering without obvious cause when the vehicle is...
- Transmission limp-home mode with fault message in IC "Gear Change to R Not Possible", the even gears are...
- Customer complaints regarding automatic transmission 724.1 (8FDCT & 8FDCT hybrid) For faster, more...
- Complaint: Check engine light comes on when driving/starting the vehicle
- 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
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- The "Easy entry and exit feature" function deactivates itself after a brief period
- After a software update for instrument cluster (IC) control unit (N133/1) is performed the following...
- Electrical system
- The head unit cannot be operated via the steering wheel buttons on the right side
- 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
- 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...
- Engine
- 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 "Easy entry and exit feature" function deactivates itself after a brief period
- The message "Device detected at diagnostics connection See Owner’s Manual" appears sporadically in the...
- Random heating of air conditioning system
- MBUX head unit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or...
- MBUX headunit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or...
- 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...
- Electrical system
- Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument...
- Noises/ squealing from the service brake in various driving situations and ambient conditions
- Electrical system
- 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)
- There may be creaking noises when steering while stationary or driving slowly
- After a software update, the MBUX multimedia system (A26/17) may incorrectly display the fault code...
- Symptoms with driver display and/or central display
- 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
- Washer fluid system leaks
- Check engine light on. One of the below fault codes is current in the engine control module (N3/10)
- Customer complains of wind noises
- After clicking on the "Radio" selection function, the radio does not start and instead a permanent loading...
- Check engine light on. Fault code P207273
- 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
- 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...
- Check engine light on and fault code P019185 current or stored in MED41 control unit
- Noise can be heard coming from the air conditioning system at higher blower motor speeds
- Instrument cluster message "4MATIC inoperative". The following fault code may be present in all-wheel...
- 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...
- Check engine light active and FC P146364 Temp
- Important emission extended warranty information
- 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
- Structure
- 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
- In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the...
- In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the...
- 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"....
- Excessive resistance of door side windows when being raised/lowered, cracking and squeaking noises
- Squeaking noises from the front axle brakes when operating the brakes
- Noise can be heard coming from the air conditioning system at higher blower motor speeds
- Power train
- Staining on door trim strips and top and bottom trim elements on rear side windows
- Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position...
- Squeaking noise from area of input shaft of electric steering
- Structure
- Customer states after a bus sleep the SiriusXM category changes from "My Favorites" to "All...
- Vibrations in steering at speeds lower than 30 mph
- 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...
- Electrical system
- Power train
- Squeaking noise from area of input shaft of electric steering
- Volume and bass level too low
- Fault message (yellow) in instrument cluster and TPM warning lamp
- Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has produced certain MY 2021-2022 A-Class,...
- MY15+ M278 and M157 Equipped Vehicles with Fault Code ""P023400 – Boost Pressure is Too High"" "
- 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.
- Insufficient charging or no wireless charging with iPhone 12.
- The customer may note that the Dashcam feature is inoperable with one of the following complaints
- Coolant warning in instrument cluster
- Free browsing, Internet access via Wi-Fi hotspot and Internet radio nonfunctional"
- Launch NCU
- With engine M17x the ME Control Unit: "The Coolant Temperature is Below the Specified Temperature"
- Water could enter rear wheel arch
- New map data cannot be downloaded by the customer from the Mercedes me PortalNew map data cannot be...
- X247 code 233
- Message (yellow) in IC "Active Brake Assist currently restricted, see operator's manual, Remedy:...
- Engine switches off again when re-attempting Remote Start via Mercedes me App. This only occurs if the...
- Steering wheel heater and/or Distronic cannot be activated
- Humming noises or vibrations from the area of the rear axle when maneuvering or moving off at traffic...
- Noise from the front axle when steering while stationary or when steering at low speeds
- Slight grinding noise when steering is turned to full lock
- Equipment
- Replace Transmission Mount
- In XENTRY diagnosis, the message "MBUX multimedia system control unit is defective (hard drive, internal...
- Equipment
- The following complaints may be noted by the customer
- Replace automatic transmission
- BR167 / MFA2
- Implausible "service due" instrument cluster message, head unit pop-up, or Mmc message
- Mobile phone Apple iPhone 11/11Pro/11ProMax/SE 2020: The Bluetooth connection between the MBUX multimedia...
- MBUX multimedia system: "Favorites" and "Recent destinations" not available
- In XENTRY diagnosis, the message "MBUX multimedia system control unit is defective (hard drive, internal...
- Lamp unit fogged or droplets forming
- Wind noises at top of windshield as of approx
- When leaving gliding mode, the transmission can shift to neutral by itself
- After starting the engine, the instrument cluster display (A40/16) may show "4MATIC inoperative"...
- Check engine light active and FC P146264 Temp
- The mobile phone address book is not transferred completely to the multimedia system (COMAND or MBUX). In...
- During a phone call, the Bluetooth connection between the MBUX multimedia system (A26/17) and a paired...
- Air conditioning system may occasionally not cool at outside temperatures >40°C
- A fixed SRS message is displayed in the instrument cluster
- Implausible "service due" instrument cluster message, head unit pop-up, or MMC message
- Check engine indicator light active and fault code P261029/P02FF85/P02FF02 stored in engine control unit
- Information Label on Tire Sealant
- Replace Torsion Bar of the Rear Axle
- EASY-Pack liftgate does not fully open
- Gasket may settle causing a slight oil leak.
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