2012 Mercedes-Benz M166

Owner complaints

Latest complaints

• Nov 21, 2019PA129,105 mi
  Power train
  This model hasn!t a transmission fluid measurement stick, but either not indicate at monitoring screen if needs fluid, also the transmission fluid pan become rusted due to low material quality leaking all fluid and causing serious automatic transmission damages, costing over us$6000.00 in repair. I…

  This model hasn!t a transmission fluid measurement stick, but either not indicate at monitoring screen if needs fluid, also the transmission fluid pan become rusted due to low material quality leaking all fluid and causing serious automatic transmission damages, costing over us$6000.00 in repair. I want that you agency open a investigation. I have the old pan to be exanminated for faulty material at all vehicle of that year and model.

Service bulletins

Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.

• 10167564Customer experiences low battery conditions, resulting in jump starts, and eventually requiring battery replacement.
• 10167563The COMAND unit does not start or the COMAND display remains dark. The COMAND unit cannot be operated. Note: The problem disappears after a lengthy idle period (>6h) or after interrupting the power supply (circuit 30).
• 10167019Blind Spot Assist inoperative.
• 10167014The rear seat heating cannot be activated when the customer has set the ambiance illumination to "Neutral" and "Stage 1" or "Stage 2" in the instrument cluster.
• 10166990Thumping noises from front axle when driving over bumps on road.
• 10166975This Customer 1 Action has been initiated because certain mbrace subscribers were recently contacted by mbrace informing them that they need to have an i-button call performed to ensure their mbrace device has registered with the Verizon Telematics systems. If the i-button call failed or if the customer was unable to perform the i-button call, the mbrace agent instructed the customer to make an appointment with their dealer to have the issue corrected and/or i-button call performed. The vehicles impacted range from model year 2002 to 2014.
• 10164811Throttle lift-off clunking noises at drive shafts of rear axle
• 10158308COMAND Online: Some contacts on the telephone are not found via voice control.
• 10158250Garmin MAP PILOT: Traffic information service and possibly voice control inoperative after navigation software update using Download Manager version 2.0.29 or 2.0.30
• 10158216Message "SOS - Service Not Activated" in instrument cluster
• 10158207Message in instrument cluster "Collision Prevention Assist Inoperative"
• 10158206Parking Pilot picture in COMAND display blurred
• 10158200Vehicle does not start, battery discharged.
• 10157089Fault message "AIRMATIC" or "Active Curve System" in instrument cluster
• 10151963Info-Call/S24H-Call/MB Contact: Change of language setting at customer request
• 10151945Audio 20: Symbols in the status line in the central display can overlap
• 10144101Check right front air suspension strut, replace if necessary
• 10136048SCN code the Engine Control Module
• 10136042Creaking noise when adjusting electrical steering column
• 10136035Complaints about poor wiping effect of winshield wiper
• 10136034Fault code P245997, P246397, P245900, P246385 or P246309 stored in engine control unit
• 10136033Fault message in instrument cluster on engine start "Power Steering Malfunction, Service Required"
• 10136029SENTEX gate operator with Clik Card Remote not compatible with Homelink
• 10136026Procedure in case of slight oil traces on TRANSMISSION 722.9
• 10136024Squeaking noise from top of B-pillar when raising and lowering front door side window
• 10136021Engine diagnosis warning lamp active - The fault code P262600 or P262900 relating to the oxygen sensor upstream of the catalytic converter may be stored in the engine control unit
• 10136020Procedure in case of slight oil traces on TRANSMISSION 722.9
• 10136011Warning message in instrument cluster. The fault code P052400 "The oil pressure is too low" is logged in the engine control unit.
• 10135986Odor from the air conditioning
• 10135983Fault code P045600 or P044200 without complaints about engine running characteristics
• 10135980Night performance of 360 camera too dark
• 10135979Audio/COMAND display: Sporadic failures of central display
• 10135977Sound system: Intermittent loss of sound after engine start
• 10135972Model series 166 - Squeaking noises from area of front axle brake
• 10135966Friction power of torque converter lockup clutch is too high (FC 2783) or actuation of torque converter lockup clutch not possible (FC 0741)
• 10135965Fault codes for combustion misfiring shortly after cold start
• 10135963Procedure in case of slight oil traces on TRANSMISSION 722.9 with CODE B03
• 10135962Fault code P045600 or P044200 without complaints about engine running characteristics
• 10135961Friction power of torque converter lockup clutch is too high (FC 2783) or actuation of torque converter lockup clutch not possible (FC 0741)
• 10135952Update Transmission Control Module Software

Every Mercedes-Benz M166 model year

Bars are owner complaints, dots mark years with recalls. Select a year to open its report.