Remove actuating unit:
Remove front seat, refer to 52 13 000 REMOVING AND INSTALLING LEFT OR RIGHT FRONT SEAT (NORMAL / MANUAL) .
Disconnect Bowden cable for longitudinal adjustment from controls, refer to 52 13 014 REPLACING BOWDEN CABLE FOR LONGITUDINAL ADJUSTMENT ON LEFT OR RIGHT FRONT SEAT (NORMAL/MANUAL) .
Press plate (1) forwards and slide actuating rod (2) upwards out of back-rest adjustment.
Slide back-rest adjustment lever.
Remove screws (1 and 2).
Slide controls downwards out of guides (3).
IMPORTANT:
Do not lift actuating unit out to side or twist (risk of damage to "seat frame").