Technical Service Bulletins (TSBs) for the 2012 SLK350 are official communications between Mercedes-Benz & their dealerships that describe processes for troubleshooting or fixing certain common problems. All vehicle manufacturers are required by U.S. law to make their TSBs available to the public.

    STEERING

    • TSB #LI46-35P059241

      Date Announced:
      JUN 20, 2014
      NHTSA ID:
      #10056472

      XENTRY (MERCEDES): AFTER ENGINE HAS STARTED, SEVERAL ISSUES OCCURS, AN ACOUSTIC WARNING SOUNDS IS HEARD, THE INSTRUMENT CLUSTER DISPLAYS WARNING MESSAGE POWER STEERING MALFUNCTION, SERVICE REQUIRED. STEERING SYSTEM IS SLUGGISH. Read More »

    • TSB #LI46.15-P-058505

      Date Announced:
      FEB 25, 2014
      NHTSA ID:
      #10167002

      Creaking noise when making vertical or longitudinal adjustment to electrical steering column Read More »

    ENGINE (PWS)

    • TSB #SC-2019040001

      Date Announced:
      APR 11, 2019
      NHTSA ID:
      #10160738

      Update engine electronics (ME-SFI) control unit software Read More »

    • TSB #LI-30-20P058689

      Date Announced:
      MAR 13, 2014
      NHTSA ID:
      #10056233

      XENTRY (MERCEDES): IN THE INSTRUMENT CLUSTER, AN ESP WARNING DUE TO IMPLAUSIBLE ACCELERATOR PEDAL SIGNAL RECEIVED FROM ENGINE CONTROL UNIT. MODEL 2012 172, 212, 218, 207, 204. *PE Read More »

    • TSB #2013060003

      Date Announced:
      SEP 27, 2013
      NHTSA ID:
      #10059576

      SUMMARY TO BE PROVIDED ON A FUTURE DATE. Read More »

    • TSB #LI-47-40-P053871

      Date Announced:
      AUG 13, 2013
      NHTSA ID:
      #10044601

      XENTRY (MERCEDES): CHECK ENGINE LIGHT (CEL) IS ACTIVATED; STORED IN ENGINE CONTROL UNIT IS VERY FINE LEAK. AUTOMATIC FUEL TANK LEAK TEST SOFTWARE IS SENSITIVE AND CAN PRODUCES AN ERRONEOUS DIAGNOSIS. Read More »

    ENGINE AND ENGINE COOLING

    • TSB #LI54.18-P-056664

      Date Announced:
      FEB 06, 2014
      NHTSA ID:
      #10167013

      The engine intermittently has reduced output and the engine diagnosis warning lamp is/was active. One or more of the faults relating to the intake manifold pressure sensor listed under 'Control unit / Fault code' may be stored in the ... Read More »

    ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

    ELECTRICAL SYSTEM

    • TSB #LI82.85-P-076799

      Date Announced:
      AUG 18, 2023
      NHTSA ID:
      #10241790

      The Mercedes me connect services cannot be activated. The remote status data does not update. Error in N112/9 - control unit for telematics services (HERMES). Read More »

    • TSB #LI30.20-P-058689

      Date Announced:
      MAR 13, 2014
      NHTSA ID:
      #10167498

      ESP warning message in instrument cluster. One of the fault codes C219700 or 630900 is logged in the ESP control unit (N30/4). Read More »

    • TSB #LI-54-15-P057918

      Date Announced:
      FEB 14, 2014
      NHTSA ID:
      #10056074

      XENTRY (MERCEDES): THE SIDE MARKERS CONTINUOUSLY LIGHTS UP, DUE TO DAMAGED ESD OF DRIVER CIRCUITRY SIDE MARKER OUTPUT. *PE Read More »

    • TSB #LI82.95-P-056655

      Date Announced:
      JUL 12, 2013
      NHTSA ID:
      #10167564

      Customer experiences low battery conditions, resulting in jump starts, and eventually requiring battery replacement. Read More »

    • TSB #LI82.85-P-055695

      Date Announced:
      JUL 08, 2013
      NHTSA ID:
      #10167563

      The 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). Read More »

    ELECTRICAL SYSTEM:12V/24V/48V BATTERY

    • TSB #SB-2011110013

      Date Announced:
      DEC 01, 2011
      NHTSA ID:
      #10043730

      MERCEDES: UPDATE HIGH VOLTAGE BATTERY SOFTWARE. MODEL 221 MODEL YEARS 2010-2012. *KB Read More »

    ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS

    • TSB #LI54-15-P057373

      Date Announced:
      FEB 28, 2014
      NHTSA ID:
      #10055333

      XENTRY (MERCEDES): THE FUSE AND RELAY BOXES (SRB) IN ENGINE COMPARTMENT OR REAR COMPARTMENT HAS A MALFUNCTION AND DISRUPTIONS TO COMMUNICATION PATHS CAUSING A NO START IN VEHICLE. Read More »

    ELECTRICAL SYSTEM:IGNITION:SWITCH

    • TSB #SCB-2011120005

      Date Announced:
      DEC 01, 2011
      NHTSA ID:
      #10043294

      MERCEDES: DURING THE PRODUCTION PROCESS OF SOME VEHICLES, THE ELECTRONIC IGNITION SWITCH WAS DAMAGED. *PE Read More »

    ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

    • TSB #LI46-35P059241

      Date Announced:
      JUN 20, 2014
      NHTSA ID:
      #10056472

      XENTRY (MERCEDES): AFTER ENGINE HAS STARTED, SEVERAL ISSUES OCCURS, AN ACOUSTIC WARNING SOUNDS IS HEARD, THE INSTRUMENT CLUSTER DISPLAYS WARNING MESSAGE POWER STEERING MALFUNCTION, SERVICE REQUIRED. STEERING SYSTEM IS SLUGGISH. Read More »

    ELECTRICAL SYSTEM:SOFTWARE

    LIGHTING (PWS)

    • TSB #LI82.10-P-064766

      Date Announced:
      JUN 30, 2020
      NHTSA ID:
      #10177571

      Lamp unit fogged or droplets forming. Due to the vent openings, the lamp unit is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate it. This can result in deposits on the diffuser and lens. Read More »

    EXTERIOR LIGHTING:HEADLIGHTS:CONCEALMENT DEVICES

    • TSB #LI82.10-P-064766

      Date Announced:
      JUN 30, 2020
      NHTSA ID:
      #10177571

      Lamp unit fogged or droplets forming. Due to the vent openings, the lamp unit is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate it. This can result in deposits on the diffuser and lens. Read More »

    VISIBILITY

    VISIBILITY:WINDSHIELD WIPER/WASHER

    AIR BAGS

    STRUCTURE

    • TSB #ELW-RearSubframe

      Date Announced:
      MAR 10, 2023
      NHTSA ID:
      #10233780

      Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 20 years/unlimited miles, and applies to the vehicle ... Read More »

    • TSB #ELW-RearSubframe

      Date Announced:
      FEB 10, 2023
      NHTSA ID:
      #10232321

      Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 20 years/unlimited miles, and applies to the vehicle ... Read More »

    • TSB #LI77.30-P-056644

      Date Announced:
      JUL 25, 2013
      NHTSA ID:
      #10167557

      Water entry through front section of retractable hardtop with the following localization: - Partial water entry in the area of the side seals to the A-pillar (for area see Fig. 1) when accelerating/braking the vehicle. Read More »

    STRUCTURE:BODY:DOOR

    • TSB #LI-72-10-P053599

      Date Announced:
      JUN 27, 2012
      NHTSA ID:
      #10045027

      XENTRY(MERCEDES): ON SOME VEHICLES, CAN NOT ENGAGE OR CLOSE FRONT DOOR PROPERLY. MODELS 197.377. NO MODEL YEARS LISTED. *PE Read More »

    LATCHES/LOCKS/LINKAGES:DOORS:LATCH

    • TSB #LI-72-10-P053599

      Date Announced:
      JUN 27, 2012
      NHTSA ID:
      #10045027

      XENTRY(MERCEDES): ON SOME VEHICLES, CAN NOT ENGAGE OR CLOSE FRONT DOOR PROPERLY. MODELS 197.377. NO MODEL YEARS LISTED. *PE Read More »

    VEHICLE SPEED CONTROL:ACCELERATOR PEDAL

    • TSB #LI-30-20P058689

      Date Announced:
      MAR 13, 2014
      NHTSA ID:
      #10056233

      XENTRY (MERCEDES): IN THE INSTRUMENT CLUSTER, AN ESP WARNING DUE TO IMPLAUSIBLE ACCELERATOR PEDAL SIGNAL RECEIVED FROM ENGINE CONTROL UNIT. MODEL 2012 172, 212, 218, 207, 204. *PE Read More »

    TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS

    • TSB #SB-2012010006

      Date Announced:
      FEB 01, 2012
      NHTSA ID:
      #10043726

      MERCEDES: TIRE PRESSURE MONITORING CODING NEEDS TO BE CHECKED AND UPDATED IF NECESSARY. *KB Read More »

    SEATS

    • TSB #LI91.18-P-077075

      Date Announced:
      DEC 04, 2023
      NHTSA ID:
      #10248162

      Crease formation on genuine leather seat covers in vehicles with low mileage ??A?A? Objects left on the seats for extended periods of time (pressure marks). ??A?A? Objects wedged between the seat backrest and seat cushion (e.g. Read More »

    • TSB #LI91.25-P-059380

      Date Announced:
      JUL 10, 2014
      NHTSA ID:
      #10166099

      Pneumatic comfort systems with insufficient performance, entirely inoperative or leaky. Read More »

    LANE DEPARTURE: BLIND SPOT DETECTION

    EQUIPMENT

    • TSB #LI82.85-P-076799

      Date Announced:
      AUG 18, 2023
      NHTSA ID:
      #10241790

      The Mercedes me connect services cannot be activated. The remote status data does not update. Error in N112/9 - control unit for telematics services (HERMES). Read More »

    • TSB #LI82.10-P-064766

      Date Announced:
      JUN 30, 2020
      NHTSA ID:
      #10177571

      Lamp unit fogged or droplets forming. Due to the vent openings, the lamp unit is an "open system". This means that acidic gases, moisture, dirt and exhaust gases can penetrate it. This can result in deposits on the diffuser and lens. Read More »

    • TSB #NCU - HVAC Warra

      Date Announced:
      MAY 21, 2020
      NHTSA ID:
      #10176670

      To enhance the satisfaction of our customers, avoid further costs of litigation and return focus to its core businesses, Mercedes-Benz USA, LLC (MBUSA) has entered into a settlement regarding claims relating to alleged mold and mildew ... Read More »

    • TSB #LI-54-21P059249

      Date Announced:
      JUL 01, 2014
      NHTSA ID:
      #10056469

      XENTRY (MERCEDES): THE CONNECTOR 20M OF THE FRONT SAM HAS CONTACT CORROSION CAUSED BY COOLANT TRAVEL VIA LEAKING SENSOR PINS AT EXPANSION RESERVOIR. MODEL 2011-2014 172. *PE UPDATED 12/12/14. Read More »

    • TSB #LI82.85-P-058582

      Date Announced:
      MAR 03, 2014
      NHTSA ID:
      #10167525

      Apple products (iPhone or iPod) are not charged via the serial USB interface of the COMAND Online control unit (A40/3) in the stowage compartment of the center console. Read More »

    EQUIPMENT:ELECTRICAL

    • TSB #LI82.70-P-060004

      Date Announced:
      OCT 14, 2014
      NHTSA ID:
      #10135628

      iPhone mobile phone: Various complaints after software update to iOS8 Read More »

    • TSB #C1A140101

      Date Announced:
      FEB 11, 2014
      NHTSA ID:
      #10166975

      This 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 ... Read More »

    EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

    • TSB #ELW-RearSubframe

      Date Announced:
      MAR 10, 2023
      NHTSA ID:
      #10233780

      Mercedes-Benz USA, LLC (MBUSA) has extended the warranty for the rear subframe on the vehicles listed below, from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 20 years/unlimited miles, and applies to the vehicle ... Read More »