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Home >> Mercedes Benz >> 2019 >> C300 4Matic, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 311 (Frame, Trailer Operation - 253 Chassis) >> Retrofitting & Conversion >> Retrofit Mechanical Detachable Parts >> Retrofit Mechanical Detachable Parts - AN31.11-P-8080-05LWH

Retrofit Mechanical Detachable Parts - AN31.11-P-8080-05LWH

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Model 253.3 

MODIFICATION NOTES

14.10.2019 Bolt, trailer hitch to longitudinal member reinforcement (short)   BA31.11-P-1001-01M
TRAILER COUPLING MECHANISM

Number Designation Model 253
BA31.11-P-1001-01M Bolt, trailer hitch to longitudinal member reinforcement (short) M12 Nm 120
TRAILER COUPLING MECHANISM

Number Designation Model 253
BA31.11-P-1002-01M Longitudinal member reinforcement for trailer hitch (short) to body Nut M12 Nm 120
Bolt M12 Nm 125
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1028-04A Assembly cleaner A 000 986 56 01

Shown on fully electric swiveling trailer hitch 

G14470240Courtesy of MERCEDES-BENZ USA
  1. Remove adhesive residue from seals (arrows) using suitable tool.

    IMPORTANT Use assembly cleaner.

    Shown on model 253.9 

    G12817510Courtesy of MERCEDES-BENZ USA
  2. Remove stop plug (8) from rear center section.

    IMPORTANT The stop plug (8) is no longer required.

  3. Insert left longitudinal member reinforcement (2) into left longitudinal frame member.
  4. Insert right longitudinal member reinforcement (3) into right longitudinal frame member.

    Shown on model 253.9 

    G12817513Courtesy of MERCEDES-BENZ USA
  5. Screw on screw/bolt (5) of right longitudinal member reinforcement (3) finger-tight.
  6. Screw on screw/bolt (5) of left longitudinal member reinforcement (2) finger-tight.

    Shown on model 253.9 

    G12817514Courtesy of MERCEDES-BENZ USA
  7. Tighten nuts (15) finger-tight.
    G12817515Courtesy of MERCEDES-BENZ USA
  8. Position trailer hitch crossmember (1) onto left and right longitudinal member reinforcements (2 and 3) and screw on screws/bolts (13) finger-tight.

    IMPORTANT Helper required.

  9. Align trailer hitch.
    G12817558Courtesy of MERCEDES-BENZ USA

    NOTES The sequence of operation steps described below must strictly be observed.

    In order to ensure that the trailer hitch is seated correctly.

  10. Tighten nuts (15) to specified torque TORQUE SPECIFICATION .
    G12817515Courtesy of MERCEDES-BENZ USA
  11. Tighten screws/bolts (5) to specified torque TORQUE SPECIFICATION .

    Shown on model 253.9 

    G12817514Courtesy of MERCEDES-BENZ USA
  12. Tighten bolts (13) at left and right to torque TORQUE SPECIFICATION .
  13. Guide trailer hitch wiring harness (20) through rear center section into vehicle interior and fit grommet provided.
    G12817558Courtesy of MERCEDES-BENZ USA