Removing and installing seat depth adjustment

Special tools and workshop equipment required

Removing

• Remove front seat → Chapter.
• Secure front seat on seat repair stand → Chapter.
• If fitted, remove storage compartment → Chapter.

• Set seat depth adjustment as far forwards as possible.
• Release locking lugs -arrows- on trim -1- using removal wedge -3409-.
• Remove trim -1- from seat depth adjustment.

• Release locking lugs -arrows- on carrier from seat depth adjustment using removal wedge -3409-.
• Pull off carrier -1- with seat padding and seat cover for seat depth adjustment upwards and towards front.

• Detach tabs -arrows- from seat depth adjustment -2-.
• Fold back carrier with seat padding and seat cover upwards.
• To do this, pull off carrier -1- with seat padding and seat cover for seat depth adjustment upwards and simultaneously towards front.

• Place carrier -2- with seat padding and seat cover for seat depth adjustment onto front seat.

For reasons of clarity, the lower seat pan frame is not shown.

• Detach seat cover retaining strips -1- and -4-.
• Remove beading strip -3- of seat cover from seat depth adjustment.
• Pull beading strip towards front.

Caution Risk of damage to locking lugs. Proceed with great care when unclipping and clipping in.

• To do this, unclip seat cover -1- from locking lugs -3-.

Vehicles with massage control unit -J740-

• Remove massage control unit -J740- → Chapter.
• Pull out seat depth adjustment.
• Unclip retaining lugs -1-.
• Lower bracket for massage control unit -J740--2- in area of retaining lugs -1-.
• Push bracket for massage control unit -J740--2- in -direction of arrow-.
• Detach bracket for massage control unit -J740--2- from mountings -arrows-.

Continued for all vehicles

• Slide seat depth adjustment towards rear.
• Remove bolts -1- and -2-
• Counterhold on nuts -3- on seat depth adjustment while doing so.

• Unclip locking lugs -1- and -3- using removal wedge -3409-.
• Pull seat depth adjustment -2- upwards and towards front off seat pan -arrows-.
• Detach tabs -4- from seat pan while doing so.
• Remove seat depth adjustment from front seat.

Installing

Install in reverse order, but note the following:

• Attach seat cover -1- to locking lugs -3-.
• Engage beading strip -2- in rear locking lugs -3-.
• Ensure that locking lugs are firmly engaged.

Caution Risk of damage to locking lugs. Proceed with great care when unclipping and clipping in.

Specified torques