Procedures

Screws (3 and 4) on spindle drive
unscrew, to install screw both spindle nuts to rear end stop. 25 Nm.

Seat rail (1)
slide toward rear.

Screws (2 each) at front on seat rail
unscrew (arrow), 14 Nm front, 9 Nm rear

Seat rail (1)
slide forward.

Screws (1 and 2) at rear on seat rail (2 each)
unscrew. 30 Nm.

Seat rail (1)
remove from seat frame.

Reinstall
in opposite order. Observe installation note.

Installation note

To install, first screw in and tighten the two rear screws.
To ensure that the seat rails run parallel, screw the two spindle nuts (5) up against the rear end stop before fastening to the seat rails. Tightening torque: 25 Nm.