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Home >> Mercedes Benz >> 2018 >> GLS450 >> Repair and Diagnosis >> Brakes >> Traction Control >> Brakes - Hydraulic & Mechanical System - 166 Chassis 2 Of 2 >> Testing & Repair >> Detach/Mount ESP® Control Unit Connector >> Detach/Mount ESP® Control Unit Connector - AR42.45-P-0820-02EW

Detach/Mount ESP® Control Unit Connector - AR42.45-P-0820-02EW

Model 166, 231, 292 

except code 233 (DISTRONIC PLUS) 

Model 207, 212 

as of model year 2014 

Model 207, 212 

up to model year 2014 

except code 233 (DISTRONIC PLUS) 

Model 217, 222 

Model 218 

as of model year 2015 

Model 218 

up to model year 2015 

except code 233 (DISTRONIC PLUS) 

Fig 1: Identifying Unlocking Tool (000 589 20 63 00)
G09976595Courtesy of MERCEDES-BENZ USA

Shown on MODEL 212 up to model year 2014 except CODE 233 (DISTRONIC PLUS) 

Fig 2: ESP® Control Unit Connector Components Location - Model 166 Except Code 233 (Shown On Model 212)
G14138804Courtesy of MERCEDES-BENZ USA

NOTES If there is any damage to the bracket (1), connector (2) or lock tabs (1f), the corresponding parts must be replaced.

Otherwise, the connector (2) may work its way loose from the ESP® control unit (4) and the brake system may malfunction.

Detach electrical connection 

  1. Carefully press release tab (1e) using SPECIAL TOOL release tool, hold it down and swivel bracket (1) upwards through approx. 90°.

    NOTES To release the connector (2) use the SPECIAL TOOL release too only.

    Otherwise, the release tab (1e), lock tab (1f) or the bracket (1) may be damaged.

    IMPORTANT By swiveling the bracket (1), the connector (2) is pushed slightly out of the jack (3) on the ESP® control unit (4).

  2. Pull connector (2) out of jack (3).

    NOTES While doing so, do not pull out connector (2) using the bracket (1).

    The bracket (1) can otherwise be damaged.

  3. Swivel bracket (1) downwards until the lock tabs (1f) latch into place.

    IMPORTANT To avoid any damage to the bracket (1) and lock tabs (1f).

    Mount electrical connection 

  4. Carefully press release tab (1e) using SPECIAL TOOL release tool, hold it down and swivel bracket (1) upwards through approx. 90°.

    NOTES To release the connector (2) use the SPECIAL TOOL release too only.

    Otherwise, the release tab (1e), lock tab (1f) or the bracket (1) may be damaged.

  5. Insert connector (2) far enough into the jack (3) on the ESP® control unit (4) until its entire length makes uniform contact with the jack (3).

    NOTES While doing so, do not insert connector (2) using bracket (1).

    The bracket (1) can otherwise be damaged.

  6. Swivel bracket (1) downwards until the lock tabs (1f) latch into place.

IMPORTANT The connector (2) is hereby drawn into its end position and locked.