Technical Service Bulletins (TSBs) for the 2018 S450 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 #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 (PWS)

    ENGINE AND ENGINE COOLING

    • 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 »

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

    FUEL SYSTEM, GASOLINE

    • TSB #SC-2022070004

      Date Announced:
      AUG 11, 2022
      NHTSA ID:
      #10219247

      Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (a??MYa??) 2028-2021 S-Class, S-Class Coupe/Cabriolet (217 and 222 platforms) vehicles, the low pressure fuel line does not ... Read More »

    • 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 #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 #LI27.50-P-071658

      Date Announced:
      AUG 26, 2020
      NHTSA ID:
      #10179950

      Harsh engagement when changing gear range from P to D or R Read More »

    • TSB #LI27.00-P-060741

      Date Announced:
      AUG 24, 2020
      NHTSA ID:
      #10179949

      Shifting complaints and transmission fault codes in vehicles with transmission 725.0 Read More »

    • 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 #NCU-OTAcommNoMMC

      Date Announced:
      JAN 18, 2024
      NHTSA ID:
      #10249726

      Mercedes-Benz AG (??A?A?MBAG??A?A?), the manufacturer of Mercedes-Benz, has determined that in certain MY 2017-2021 C-Class, CLA, CLS, E-Class, GLC, GLE, GLS, AMG GT, S-Class, SL, and SLC (205, 117, 257, 213/238, 253, 166/292, ... Read More »

    • TSB #LI82.85-P-076800

      Date Announced:
      OCT 10, 2023
      NHTSA ID:
      #10244837

      The "SOS nonfunctional" message appears sporadically in the instrument cluster of the vehicle. The fault code B129C00 is stored in the control unit log. Read More »

    • TSB #NCU-HU SW Update

      Date Announced:
      AUG 28, 2023
      NHTSA ID:
      #10241527

      Mercedes-Benz AG (a??MBAGa??), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2018-2023 C-Class, EQE, EQE SUV, EQS, EQS SUV, GLC, GLE and S-Class (206, 295, 294, 297, 296, 254, 167 and 223 platform) ... Read More »

    • 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 #SC-2019060011

      Date Announced:
      JAN 10, 2020
      NHTSA ID:
      #10171657

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

    • TSB #SC-2019070001

      Date Announced:
      JAN 10, 2020
      NHTSA ID:
      #10171658

      Update Engine Control Unit Software 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 #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 #LI82.85-P-076800

      Date Announced:
      OCT 10, 2023
      NHTSA ID:
      #10244837

      The "SOS nonfunctional" message appears sporadically in the instrument cluster of the vehicle. The fault code B129C00 is stored in the control unit log. 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 #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 #NCU-HU SW Update

      Date Announced:
      AUG 28, 2023
      NHTSA ID:
      #10241527

      Mercedes-Benz AG (a??MBAGa??), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2018-2023 C-Class, EQE, EQE SUV, EQS, EQS SUV, GLC, GLE and S-Class (206, 295, 294, 297, 296, 254, 167 and 223 platform) ... 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

    EXTERIOR LIGHTING

    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 »

    • TSB #LI91.10-P-065540

      Date Announced:
      MAY 26, 2022
      NHTSA ID:
      #10213055

      Complaint Creaking noise from side bolster when load applied to seat cushion of front seats. Cause Soiling to the replacement fabric of the seat cushion cover means that friction on the seat side finisher mountings generates a creaking ... 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 #LI82 20-P-067107

      Date Announced:
      OCT 05, 2017
      NHTSA ID:
      #10158321

      LED light on thermal cup holder in rear passenger compartment of BR 222 flickers 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 #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