2023 Mercedes-Benz GLC 300 technical service bulletins
342 technical service bulletins and manufacturer communications cover the 2023 Mercedes-Benz GLC 300, 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...
- 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
- Issue A software update will be performed that provides enhancements to the robustness and system...
- 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...
- 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...
- 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
- Frequent rear view camera flap actuations and/or noise associated
- 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...
- DAB, FM, or SDARS radio reception is limited, only a few stations are found
- 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...
- 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
- The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the...
- 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 panoramic sliding sunroof operates in a stepped movement
- The intent of
- Headlamp, front fog lamp leaky or fogged
- No heating output is available during electric driving operation
- SRS indicator light illuminated in the instrument cluster
- After opening the driver's door, the seat can no longer be moved using the Memory button
- -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...
- 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
- Headlamps leaking or fogged
- Tailgate opens unintentionally
- The check engine light illuminates or the 48 V message is displayed in the instrument cluster
- Unknown or other
- Check engine light on with the following fault is current in the VGS Control Unit: P084300 Oil pressure...
- Activating Navigation Please Wait" message seen on central display
- Electrical system
- Complaint: Clattering noise from area of hood with steel suspension
- Electrical system
- An authorized Mercedes-Benz dealer will update the software for the battery management control unit in...
- Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz...
- Electrical system
- 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)...
- 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...
- An instrument cluster message "Rear axle steering fault, stop immediately" is very briefly illuminated in...
- Displayed Message: “Driver camera not functioning, see Operator’s Manual”
- USB port not functioning properly
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
- 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
- Unknown or other
- The result from the XENTRY battery test does not match the current state of the battery
- Electrical system
- Check engine lamp activated, coolant warning message, and engine fan running at full speed
- 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...
- Users report that the browser no longer supports search queries entered directly into the address bar
- 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
- Complaint
- Fuel filler flap/socket flap sticks, cannot be opened
- The "Easy entry and exit feature" function deactivates itself after a brief period
- Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument...
- 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
- 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...
- 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...
- Squeaking or creaking noises on uneven roadways, in turns, or when moving in their seat
- Load compartment cover generates a creaking noise during driving when pulled out to covering position
- After a software update of HERMES communication module N112/9 has been performed on a gray import vehicle,...
- Check engine lamp activated, coolant warning message, and engine fan running at full speed
- Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT...
- Please note that the exact quick test conditions must be met as seen below
- Electrical system
- 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
- 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
- Rear cross traffic activation without obvious
- A clicking/ticking/taping noise from underneath the vehicle with engine off during ECO stop event or after...
- Red TPMS warning message in instrument cluster with "Check Tire" despite correctly set tire inflation...
- MBUX headunit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or...
- 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...
- Electrical system
- 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
- Noises/ squealing from the service brake in various driving situations and ambient conditions
- 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
- Sliding sunroof panel of panoramic sliding sunroof reverses (temporarily, once, multiple times) during...
- Check engine lamp activated, coolant warning message, and engine fan running at full speed
- 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
- Play noticeable in the height adjustment of the steering column
- The vehicle's position on the map is displayed far away from its actual position, e.g. the vehicle is...
- Customer states CEL is on. Cause Quick test shows FC P0A7F00 The state of health limit of the...
- 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...
- 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...
- Washer fluid system leaks
- 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)
- Electrical system
- 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
- After clicking on the "Radio" selection function, the radio does not start and instead a permanent loading...
- Cause The following conditions can occur on vehicles with a disconnected on-board electrical system...
- White plastic insert present on microphone assembly
- Sliding sunroof panel of panoramic sliding sunroof reverses (temporarily, once, multiple times) during...
- Display dark (total or partial) of one or more ASCM (AMG) steering wheel button displays
- Check engine light on. Fault code P207273
- 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
- Electrical system
- Once the head unit A26/17 is updated to the FUP4 software release E445.0, it may be the case that online...
- Update Digital Operator's Manual
- 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...
- The battery management control unit software does not meet current production specifications
- Electrical system
- Check engine light on and fault code P019185 current or stored in MED41 control unit
- Unknown or other
- Unknown or other
- USB port data storage medium is not recognized, but charging function is still available
- The vehicles were visible and flagged in VMI as “OPEN” on June 8 and 11, 2024
- 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...
- • 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...
- Wheels
- Wind noises from the radiator shell between 30 and 60 mph
- Electrical system
- Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during...
- An authorized Mercedes-Benz dealer will replace the TIREFIT bottle in the trunk of your vehicle, free of...
- This is to notify you of the Service Campaign OTA update for the MBUX system software in 750,313 Model...
- This is to notify you of the Service Campaign Launch to check the regulation valve in 139 Model Year (MY)...
- The update of the RAMSES 1.1 module to the SW version E139.4 results in a fault in the vtime of the module...
- Check engine lamp activated, coolant warning message, and engine fan running at full speed
- This is to notify you of the Service Campaign Launch to update the SCN coding for the drive unit DRVU...
- The following symptoms may be present in the instrument cluster: 1. "Perform vehicle handover" in the...
- Tailgate opens unintentionally
- Check right tailgate, rework if necessary Check/test procedure 1. Remove top center rear spoiler
- Electrical system
- 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...
- 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
- No audio is output either in radio mode, or with media playback via app, Bluetooth or USB. In such cases,...
- Structure
- 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
- Wheezing noises from the front shock absorbers when passing over surface undulations and rough road
- Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during...
- 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
- Perceptible volume jumps at 15 and 10 mph
- Check engine lamp activated, coolant warning message, and engine fan running at full speed
- Electrical system
- Cl - 2023060007
- The trunk lid only opens/closes successfully after several attempts
- Rattling/knocking noise from the rear axle steering is audible when driving on rough terrain or cobblestones
- Engine and engine cooling
- Structure
- 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...
- Wireless charging start/charging behavior of iPhone 14 is not optimal
- Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position...
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