Technical Service Bulletins (TSBs) for the 2016 S550 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 #LI46.10-P-057961

      Date Announced:
      FEB 18, 2014
      NHTSA ID:
      #10167000

      Surface damage on steering wheel trim Read More »

    • TSB #LI33.30-P-056665

      Date Announced:
      JUL 18, 2013
      NHTSA ID:
      #10167550

      Single, throttle lift-off, clunking noise from the side shaft when starting off (audible at the wheel). The clunk is heard once when changing from forward to reverse (and vice versa). Read More »

    SUSPENSION

    • TSB #NCU-2023050005

      Date Announced:
      JUN 23, 2023
      NHTSA ID:
      #10238430

      Mercedes-Benz AG (a??MBAGa??), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (a??MYa??) 2014-2020 S-Class (217 and 222 platform) vehicles, the incorrect pilot bushings may have been installed in the ... Read More »

    • TSB #LI33 30-P-056665

      Date Announced:
      AUG 05, 2019
      NHTSA ID:
      #10164810

      Throttle lift-off clunking noises at drive shafts of front axle Read More »

    • TSB #LI32.22-P-058763

      Date Announced:
      MAR 20, 2014
      NHTSA ID:
      #10167500

      Thumping/rattling/clattering noises from area of rear axle. Primarily, and sometimes only, heard by rear-seat passengers. Read More »

    • TSB #LI32.22-P-058343

      Date Announced:
      MAR 17, 2014
      NHTSA ID:
      #10167499

      The vehicle drops at the front axle on one or both sides by more than 2 cm overnight. Read More »

    • TSB #LI42.10-P-058354

      Date Announced:
      FEB 25, 2014
      NHTSA ID:
      #10166996

      Squeaking noises from the front axle when braking Read More »

    • TSB #LI32.22-P-058342

      Date Announced:
      JAN 31, 2014
      NHTSA ID:
      #10166991

      Creaking noises from the area of the air suspension strut on the front axle when driving over bumps with the steering turned. Topic only reported from outer wheel until now. Read More »

    • TSB #LI32.22-P-058343

      Date Announced:
      JAN 31, 2014
      NHTSA ID:
      #10166992

      The vehicle drops at the front axle on one or both sides by more than 2 cm overnight. Read More »

    SUSPENSION:FRONT:MACPHERSON STRUT

    • TSB #NCU-2023050005

      Date Announced:
      JUN 23, 2023
      NHTSA ID:
      #10238430

      Mercedes-Benz AG (a??MBAGa??), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (a??MYa??) 2014-2020 S-Class (217 and 222 platform) vehicles, the incorrect pilot bushings may have been installed in the ... Read More »

    SERVICE BRAKES, HYDRAULIC

    • TSB #LI42.10-P-058354

      Date Announced:
      MAR 21, 2014
      NHTSA ID:
      #10167503

      Squeaking noises from the service brake when braking. The complaint occurs primarily at low speeds when the operating temperature of the brakes is low. Read More »

    ENGINE AND ENGINE COOLING

    • TSB #ELW - M278 Cat

      Date Announced:
      JUL 27, 2023
      NHTSA ID:
      #10240203

      This NCU replaces the prior NCU issued on May 11, 2023, and clarifies replacement part information. In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, ... Read More »

    • TSB #ELW-M278Catalyst

      Date Announced:
      MAY 11, 2023
      NHTSA ID:
      #10237240

      This extended warranty applies to the following condition that may necessitate the repair or replacement of the catalytic converter system and is related to: a?? A check engine Malfunction Indicator Lamp (a??MILa??) may illuminate due to ... Read More »

    • TSB #CL-ELWExhaustVal

      Date Announced:
      MAR 30, 2023
      NHTSA ID:
      #10233794

      Why the warranty extension? On certain Model Year 2011-2016 CL/CLS/S/E/ML/SL/G/GL/GLE-Class vehicles with V8 engines, the exhaust valve assembly might not work properly and result in an engine misfire and potential illumination of the ... Read More »

    • TSB #ELW-ExhaustValve

      Date Announced:
      MAR 10, 2023
      NHTSA ID:
      #10233778

      In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (a??MBUSAa??) is extending the warranty coverage on the exhaust valve system in ... Read More »

    • TSB #LI09.00-P-074093

      Date Announced:
      DEC 08, 2021
      NHTSA ID:
      #10206077

      "MY15+ M278 and M157 Equipped Vehicles with Fault Code ""P023400 a?? Boost Pressure is Too High"" " Read More »

    • TSB #LI05.10-P-056435

      Date Announced:
      MAR 21, 2014
      NHTSA ID:
      #10167488

      Engine rattling noise after engine start for several seconds Read More »

    ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:SEALS/GASKETS

    ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

    • TSB #ELW - M278 Cat

      Date Announced:
      JUL 27, 2023
      NHTSA ID:
      #10240203

      This NCU replaces the prior NCU issued on May 11, 2023, and clarifies replacement part information. In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, ... Read More »

    ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

    • TSB #ELW-M278Catalyst

      Date Announced:
      MAY 11, 2023
      NHTSA ID:
      #10237240

      This extended warranty applies to the following condition that may necessitate the repair or replacement of the catalytic converter system and is related to: a?? A check engine Malfunction Indicator Lamp (a??MILa??) may illuminate due to ... Read More »

    FUEL SYSTEM, GASOLINE

    • TSB #LI8860P073470

      Date Announced:
      AUG 11, 2021
      NHTSA ID:
      #10205814

      Fuel filler flap opens slowly/switch flashes/tank is bleeding instrument cluster warning Read More »

    • TSB #P-SC-2017080006

      Date Announced:
      MAR 02, 2018
      NHTSA ID:
      #10144074

      Update fuel system control unit (FSCU) software Read More »

    • TSB #LI01.30-P-058630

      Date Announced:
      MAR 21, 2014
      NHTSA ID:
      #10167487

      Minor leaks at the oil duct of the left or right cylinder head of engines 157, 276 and 278. 1. Left cylinder head: Oil passage plug hole on left beside mechanical vacuum pump. 2. Read More »

    FUEL SYSTEM, GASOLINE:STORAGE

    • TSB #LI8860P073470

      Date Announced:
      AUG 11, 2021
      NHTSA ID:
      #10205814

      Fuel filler flap opens slowly/switch flashes/tank is bleeding instrument cluster warning Read More »

    POWER TRAIN

    • TSB #LI27.60-P-071237

      Date Announced:
      MAY 01, 2020
      NHTSA ID:
      #10176661

      5 to 4 coasting downshift - shift quality concern with cold trans- mission oil on MODEL 217 or 222 in combination with ENGI- NE 278 and TRANSMISSION 722.9 without code 835/498 Read More »

    • TSB #LI35 30-P-058566

      Date Announced:
      AUG 05, 2019
      NHTSA ID:
      #10164811

      Throttle lift-off clunking noises at drive shafts of rear axle Read More »

    • TSB #LI27.20-P-055758

      Date Announced:
      JUL 30, 2013
      NHTSA ID:
      #10167546

      FC 2783 (Friction power of torque converter lockup clutch is too high) or FC 0741 (Actuation of torque converter lockup clutch not possible) stored in transmission control unit. Read More »

    HYBRID PROPULSION SYSTEM

    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 #LI54.10-P-071499

      Date Announced:
      MAR 31, 2022
      NHTSA ID:
      #10209877

      Complaint The result from the XENTRY battery test does not match the current state of the battery. Cause The XENTRY battery tester uses the stored on-board electrical system data in the SAM module to access the health of the 12 volt ... Read More »

    • TSB #LI68.05-P-060306

      Date Announced:
      JAN 27, 2022
      NHTSA ID:
      #10207198

      Complaint The garage door hand transmitter cannot be initialized with the integrated garage door opener in the inside rearview mirror. Cause 1. Read More »

    • TSB #LI68.05-P-060307

      Date Announced:
      JAN 09, 2022
      NHTSA ID:
      #10207199

      Complaint The range of the integrated garage door opener (GTO) is too short. Cause 1. Vehicles equipped with infrared windows and/or a heated windshield may suffer from complaints involving low transmission power. 2. Read More »

    • TSB #LI54.30-P-072145

      Date Announced:
      DEC 10, 2020
      NHTSA ID:
      #10186141

      NTG5.5: Incorrect time shown on instrument cluster, COMAND display, and analog clock Read More »

    • TSB #LI54.30-P-070902

      Date Announced:
      FEB 19, 2020
      NHTSA ID:
      #10172681

      Event memory in the instrument cluster mileage readings intermittently inaccurate Read More »

    • TSB #LI80.20-P-059363

      Date Announced:
      JUL 12, 2014
      NHTSA ID:
      #10165854

      The trunk lid sometimes does not open completely and does not close (completely). This complaint is accompanied by the following symptoms: - Illumination of the trunk lid control button (S62/26) fails. Read More »

    • TSB #LI82.85-P-059356

      Date Announced:
      JUL 08, 2014
      NHTSA ID:
      #10166075

      The animation in individual vehicle settings such as, e.g. mirror folding function or seat belt adjustment is missing. Note: The functions of these vehicle settings are not affected. Read More »

    • TSB #LI07.08-P-058759

      Date Announced:
      MAR 24, 2014
      NHTSA ID:
      #10167490

      Engine diagnosis warning lamp (check engine light - CEL) lights up in instrument cluster. Fault codes relating to combustion misfiring are logged in the fault memory of the engine control unit. Read More »

    • TSB #LI01.30-P-058630

      Date Announced:
      MAR 21, 2014
      NHTSA ID:
      #10167487

      Minor leaks at the oil duct of the left or right cylinder head of engines 157, 276 and 278. 1. Left cylinder head: Oil passage plug hole on left beside mechanical vacuum pump. 2. Read More »

    • TSB #LI54.15-P-057918

      Date Announced:
      FEB 14, 2014
      NHTSA ID:
      #10167011

      The side markers light up continuously. Read More »

    • TSB #LI82 95-P-056655

      Date Announced:
      JUL 23, 2013
      NHTSA ID:
      #10167558

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

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

    ELECTRICAL SYSTEM:WIRING: REAR COMPARTMENT/TRUNK

    ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:CONTROL MODULE

    ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

    • TSB #LI54.30-P-072145

      Date Announced:
      DEC 10, 2020
      NHTSA ID:
      #10186141

      NTG5.5: Incorrect time shown on instrument cluster, COMAND display, and analog clock Read More »

    • TSB #LI83-70-P-064480

      Date Announced:
      MAY 22, 2019
      NHTSA ID:
      #10162197

      "High-voltage battery warning message" in instrument cluster Read More »

    • TSB #LI8370P0644803

      Date Announced:
      AUG 11, 2016
      NHTSA ID:
      #10205252

      High voltage battery warning message in instrument cluster. Read More »

    • TSB #LI68.20-P-059330

      Date Announced:
      JUL 03, 2014
      NHTSA ID:
      #10165853

      When on rough roads and with side loads applied to the center console (leg support) cracking noise may occur in the transition between the instrument panel and the center console. Read More »

    ELECTRICAL SYSTEM:SOFTWARE

    • TSB #Launch NCU - 202

      Date Announced:
      JAN 07, 2021
      NHTSA ID:
      #10187793

      Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz, has determined that on certain Model Year (?MY?) 2013-2017 B-Class, C-Class, CLA-Class, CLS-Class, E-Class, G-Class, GL-Class, GLA-Class, GLC-Class, GLE-Class, GLK-Class, ... Read More »

    • TSB #LI82-85-P-069789

      Date Announced:
      MAY 20, 2019
      NHTSA ID:
      #10162185

      NTG 5.5 head unit - Browser shows "Fault during authentication" message Read More »

    • TSB #LI8270P055572

      Date Announced:
      AUG 05, 2013
      NHTSA ID:
      #10205233

      Mobile phone cotacts are not transferred completely. Read More »

    ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER

    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

    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

    STRUCTURE

    STRUCTURE:BODY:DOOR:HINGE AND ATTACHMENTS

    LATCHES/LOCKS/LINKAGES:TRUNK LID:LOCK

    • TSB #LI80.20-P-059363

      Date Announced:
      JUL 12, 2014
      NHTSA ID:
      #10165854

      The trunk lid sometimes does not open completely and does not close (completely). This complaint is accompanied by the following symptoms: - Illumination of the trunk lid control button (S62/26) fails. Read More »

    TIRES

    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 »

    INTERIOR LIGHTING

    COMMUNICATION

    • TSB #LI82.85-P-071453

      Date Announced:
      JUL 31, 2020
      NHTSA ID:
      #10179966

      Incorrect time and/or instrument cluster message "SOS, service not activated" and/or Mercedes Me connect services nonfunctional Read More »

    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 #LI9110P0633475

      Date Announced:
      NOV 21, 2016
      NHTSA ID:
      #10205266

      Map pocket on front seat backrest trim does not close. Read More »

    • TSB #LI82.62-P-058583

      Date Announced:
      FEB 27, 2014
      NHTSA ID:
      #10167524

      Sound system: Intermittent loss of sound after engine start Read More »

    • TSB #GI88.40-P-057430

      Date Announced:
      FEB 03, 2014
      NHTSA ID:
      #10166976

      Message in instrument cluster "DISTRONIC PLUSCurrently Unavailable - See Owner's Manual" Read More »

    EQUIPMENT:ELECTRICAL

    • TSB #LI8270P071024

      Date Announced:
      AUG 27, 2021
      NHTSA ID:
      #10205803

      The mobile phone address book may not be transferred completely to the multimedia system COMAND, Audio 20, or MBUX. Read More »

    • TSB #LI80.61-P-061174

      Date Announced:
      MAR 31, 2015
      NHTSA ID:
      #10135604

      Vehicle cannot be opened via Keyless-Go and radio remote control Read More »

    • 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 »

    EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM)

    • TSB #Launch NCU - 202

      Date Announced:
      JAN 07, 2021
      NHTSA ID:
      #10187793

      Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz, has determined that on certain Model Year (?MY?) 2013-2017 B-Class, C-Class, CLA-Class, CLS-Class, E-Class, G-Class, GL-Class, GLA-Class, GLC-Class, GLE-Class, GLK-Class, ... Read More »

    • TSB #LI82.85-P-071453

      Date Announced:
      JUL 31, 2020
      NHTSA ID:
      #10179966

      Incorrect time and/or instrument cluster message "SOS, service not activated" and/or Mercedes Me connect services nonfunctional Read More »

    • TSB #LI8285P0633424

      Date Announced:
      NOV 29, 2016
      NHTSA ID:
      #10205242

      Navigation system permanently displays "Activating". Read More »

    • TSB #LI8285P0633423

      Date Announced:
      AUG 25, 2016
      NHTSA ID:
      #10205241

      Navigation system permanently displays "Activating". Read More »

    EQUIPMENT:OTHER:LABELS

    EQUIPMENT ADAPTIVE/MOBILITY

    UNKNOWN OR OTHER