Window Motor and Regulator - Front

This procedure covers the removal and replacement of the front window motor and regulator assembly on a 2007-2013 Mercedes-Benz S65 AMG, including door panel removal and window alignment.

Warnings

Tools required

Parts

• Window regulator assembly with motor × 1 — Use OEM specification
• Door panel retaining clips × 1 — Replace as needed
• Vapor barrier (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Roll window to fully closed position before starting work
3. Disconnect negative battery terminal and wait 5 minutes for system capacitor discharge
4. Prepare clean workspace for door panel to prevent scratches to trim
5. Take photos of connector locations and wire routing before disassembly

Procedure

1. 1

   Disconnect Battery
   Disconnect the negative battery terminal using a 10mm socket. Wait 5 minutes to allow all electronic systems to fully discharge. This prevents accidental window movement during repair.
   Torque spec

   Battery Terminal Bolts6 Nm (4 lb-ft)
2. 2

   Remove Door Panel
   Remove the door pull handle cover using a panel tool. Remove T25 Torx screws behind the handle. Remove T20 Torx screw from door latch bezel. Use panel removal tools to release approximately 12-15 clips around door panel perimeter, starting from bottom rear and working forward. Lift panel upward to disengage from window ledge, then pull away from door.
3. 3

   Disconnect Door Panel Electrical
   Disconnect all electrical connectors from door panel including: door lock switch module, window switch module, ambient lighting, tweeter speaker, and seat memory switch (driver side). Press release tabs firmly and pull connectors straight out. Set door panel aside in safe location.
4. 4

   Peel Back Vapor Barrier
   Carefully peel back the plastic vapor barrier starting from one corner. Work slowly to avoid tearing. If equipped with foam insulation, remove or fold back to access regulator mounting bolts. The vapor barrier can typically be reused if removed carefully.
5. 5

   Support Window Glass
   Secure the window glass in the full-up position using masking tape from top of glass to door frame, or have helper hold glass. This prevents the glass from dropping into the door when the regulator is disconnected.
   ⚠Window glass weighs approximately 8-12 lbs and will drop suddenly if not supported when regulator is removed
6. 6

   Disconnect Window from Regulator
   Locate the two window glass mounting bolts accessible through service holes in door frame. Use 10mm socket to remove both bolts that secure glass to regulator carrier. Gently lift glass slightly to separate from regulator carrier bracket.
7. 7

   Disconnect Motor Electrical
   Locate window motor connector on the motor body. Press release tab and disconnect electrical connector. For models with anti-pinch sensor, disconnect secondary sensor connector. Note wire routing for reinstallation.
8. 8

   Remove Regulator Mounting Bolts
   Remove the regulator mounting bolts using appropriate socket (typically 10mm). There are usually 3-4 bolts securing regulator to door frame. Support regulator assembly as you remove final bolt to prevent it from falling.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
9. 9

   Extract Regulator Assembly
   Carefully maneuver the regulator and motor assembly out through the large service opening in door frame. The assembly may need to be rotated and angled to clear internal door structures. Work slowly to avoid damaging vapor barrier or scratching door frame.
10. 10

    Install New Regulator
    Position new regulator assembly into door frame through service opening. Align mounting holes with door frame. Thread all mounting bolts by hand first to ensure proper alignment. Torque mounting bolts to specification in cross pattern.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
11. 11

    Connect Motor Electrical
    Connect window motor electrical connector ensuring it clicks firmly into place. Connect anti-pinch sensor connector if equipped. Verify connectors are fully seated and locking tabs engaged. Route wiring to avoid pinch points and moving parts.
12. 12

    Reconnect Window Glass
    Lower window glass onto regulator carrier brackets. Align mounting holes and install both 10mm mounting bolts finger tight initially. Ensure glass sits squarely on carrier before final tightening. Torque bolts to specification.
13. 13

    Test Window Operation
    Reconnect battery negative terminal and torque to specification. Before reinstalling door panel, test window operation through several full up/down cycles. Check for smooth operation, unusual noises, and proper alignment with window frame. Window should seal properly at full-up position.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)
14. 14

    Reinstall Vapor Barrier and Door Panel
    Press vapor barrier back into place ensuring complete seal around perimeter. Reconnect all door panel electrical connectors. Position door panel and engage window ledge first, then press firmly around perimeter to seat all clips. Reinstall all Torx screws and covers.

Reassembly

1. Install new door panel clips if any were broken during removal
2. Ensure all electrical connectors are fully seated before testing to avoid fault codes
3. Perform window initialization procedure using diagnostic scanner or one-touch auto window procedure if available
4. Check window anti-pinch function operates correctly by testing with soft object

Verification

• Operate window through full range multiple times checking for smooth operation without binding or unusual noises
• Verify window closes completely and seals properly against weatherstrip at full-up position
• Test one-touch auto up/down functions operate correctly (if equipped)
• Check anti-pinch safety function activates when obstruction detected
• Verify no warning lights or fault codes displayed on instrument cluster
• Confirm all door panel functions work correctly: switches, lighting, speakers
• Inspect window alignment in door frame from exterior - should be flush and properly gapped

Related trouble codes on this vehicle

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