67 31 500 Removing and installing/replacing drive unit for longitudinal seat adjustment

Unclip trim in upper rail at front (1) in direction of arrow and remove.

Fig 1: Removing Trim In Upper Rail At Front

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Unclip outer trim on upper rail (1) at front in direction of arrow and feed out towards rear.

Fig 2: Removing Outer Trim On Upper Rail

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Version up to 03/2003: 

Cut through cable tie (1).

Fig 3: Disconnecting Plug Connection

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Disconnect plug connection (2).

Unscrew nuts (1). If necessary, grip screws and remove from drive unit for longitudinal seat adjustment (2).

Fig 4: Removing Screws From Drive Unit For Longitudinal Seat Adjustment

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Lever drive unit for longitudinal seat adjustment (1) with rubber grommet (2) upwards out of guide (3).

Fig 5: Disconnecting Drive Shafts

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Disconnect both drive shafts (4) from drive unit for longitudinal seat adjustment (1).

Installation: 

Make sure rubber grommet (2) is correctly seated in guide (3).

Make sure both drive shafts (4) are correctly seated.

Build date from 03/2003: 

Disconnect plug connections (1).

Fig 6: Releasing Expander Rivets

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Release expander rivets (2), replace if necessary.

Raise flange (1) with drive unit for longitudinal seat adjustment (2) slightly and detach from left drive shaft.

Fig 7: Locating Flange

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Feed out drive unit for longitudinal seat adjustment (2) in direction of arrow and detach from right drive shaft.

Installation: 

Make sure guide clips (3) and both drive shafts (4) are correctly seated.

Comfort seat, all build dates: 

Replacement: 

Initialize drive unit for longitudinal seat adjustment. Refer to 67 31... NOTES ON INITIALIZING ELECTRIC SEAT SERVODRIVES .