Technical Service Bulletins (TSBs) for the 2017 GLS550 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 #T-SC-2017020020

      Date Announced:
      AUG 17, 2017
      NHTSA ID:
      #10157079

      Correct Torque of Front Left and Right Torsion (Stabilizer) Bar Linkage Nut Read More »

    • TSB #T-SC-2017050009

      Date Announced:
      AUG 17, 2017
      NHTSA ID:
      #10157080

      Correct Torque of Front Left and Right Torsion (Stabilizer) Bar Linkage Nut Read More »

    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:HARD PARTS INTERNAL/MECHANICAL

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

    FUEL SYSTEM, GASOLINE

    • TSB #SC-2020090003

      Date Announced:
      SEP 25, 2020
      NHTSA ID:
      #10181203

      Replace tank filler recess and information labels 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 »

    POWER TRAIN:AXLE ASSEMBLY

    ELECTRICAL SYSTEM

    • TSB #NCU - 2024030005

      Date Announced:
      APR 18, 2024
      NHTSA ID:
      #10253705

      This is to notify you of an Emission Service Campaign launch to update the Engine Control Unit software on 16 Model Year (MY) 2017 GLS vehicles (166 platform). The vehicles will be visible and flagged in VMI as OPEN on April 19, 2024. Read More »

    • 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 #LI08.00-P-072749

      Date Announced:
      APR 20, 2021
      NHTSA ID:
      #10195220

      For plug in hybrid and electric variants: Complaints about the electric range Read More »

    • TSB #LI54 10-P-066344

      Date Announced:
      OCT 26, 2017
      NHTSA ID:
      #10158372

      Vehicle does not start, battery discharged. Read More »

    • TSB #LI32 34-P-056198

      Date Announced:
      OCT 18, 2017
      NHTSA ID:
      #10158339

      Fault message "AIRMATIC" or "Active Curve System" in instrument cluster Read More »

    • TSB #LI8330P0646722

      Date Announced:
      AUG 17, 2016
      NHTSA ID:
      #10205251

      Engine fan runs continuously, a/c inoperable or, engine light illuminates sporadically. Read More »

    • TSB #LI8330P0646721

      Date Announced:
      AUG 11, 2016
      NHTSA ID:
      #10205250

      Engine fan runs continuously, a/c inoperable or, engine light illuminates sporadically. 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 »

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

    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 »

    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 »

    EXTERIOR LIGHTING

    EXTERIOR LIGHTING:HEADLIGHTS

    VISIBILITY:SUN/MOON ROOF ASSEMBLY

    • TSB #LI77.21-P-072113

      Date Announced:
      DEC 08, 2020
      NHTSA ID:
      #10186145

      Creaking noise from fixed glass section of panoramic roof in area of rear passenger compartment grab handles Read More »

    STRUCTURE:BODY:ROOF AND PILLARS

    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 »

    BACK OVER PREVENTION

    EQUIPMENT

    • 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 »

    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 »

    EQUIPMENT:OTHER:LABELS

    EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

    UNKNOWN OR OTHER