52 14 ... Additional Work (Normal/Electric) With Defective Drive/Gear For Longitudinal Adjustment

Move seat height and seat tilt adjustment to top position.

To obtain improved access if necessary:

• Release screws (1).
• Tip seat towards rear.

Installation: 

Tightening torque, 52 10 6AZ.  See 52 10 FRONT SEATS

Lift drive (1) and flex shaft (3) out of guide (2) in direction of arrow.

Detach flex shaft (3) (plug connection).

Release screws (1).

Remove drive (4).

Detach flex shaft (3) with holder (2).

Activate the operating switch for the seat position adjustment:

1. No function: 
   • Disconnect plug connection on drive.
   • Connect new drive and check function.
   • Gear is OK. if drive runs.

   Assemble seat.

2. Drive running: 
   • Gear for longitudinal seat adjustment defective.

Removing gear for longitudinal seat adjustment: 

Release screws (1).

Remove worm gear (2) on left and right with cover.

Release screws (1) on upper rail on left and right.

Remove front seat.  See 52 14 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT SEAT (NORMAL/ELECTRIC) 

Replace both seat rails.  See 52 14 010 REMOVING AND INSTALLING/REPLACING BOTH SEAT RAILS ON LEFT OR RIGHT FRONT SEAT (NORMAL/ELECTRIC)