Front seats

Pre-facelift front seat crosscut.

Front seat adjustment

The seat adjustment switches are located on the front doors.

• (1) Head restraint height
• (2) Seat height
• (3) Seat cushion tilt
• (4) Seat cushion depth
• (5) Seat fore and aft adjustment
• (6) Seat backrest tilt

To adjust the seat switch on ignition or open the respective door.

Seat fore and aft adjustment: Press the switch forward or backward in the direction of arrow (5). Adjust seat to a comfortable seating position that still allows you to reach the accelerator/brake pedal safely. The position should be as far to the rear as possible, consistent with ability to properly operate controls.

Seat cushion tilt: Press the switch up or down in the direction of arrow (3) until your upper legs are lightly supported.

Seat cushion depth: Press the switch forward or backward in the direction of arrow (4) until your legs are supported comfortably.

Seat backrest tilt: Press the switch forward or backward in the direction of arrow (6) until your arms are slightly angled when holding the steering wheel.

Seat height: Press the switch up or down in the direction of arrow (2).

Head restraint height: Press the switch up or down in the direction of arrow (1).

Head restraint tilt: Manually adjust the angle of the head restraint. Push or pull on the lower edge of the head restraint cushion.

Unoccupied front passenger seat automatic adjusting: The feature below is deactivated at the factory. If you wish to have it activated, use DAS. The front passenger seat head restraint automatically lowers after a few seconds when the front passenger seat is not occupied. This improves the driver's outward view as well as the forward view from the rear passenger compartment. When the front passenger seat is occupied again, the front passenger seat head restraint returns to the last set position within a few seconds. If the front passenger seat was moved fore or aft while not being occupied, the front passenger seat head restraint returns to a position that corresponds best with the seat’s axial position when the seat is occupied again.

Remove/install front seat backrest seat-back lining

1 - Bolts 2 - Seat-back lining

1. Slide the front seat forwards with the longitudinal adjustment mechanism
2. Slide backrest forwards with the inclination adjustment mechanism
3. Unscrew screws (1)
4. Pull seat-back lining (2) down and take off. Installation: slide seat-back lining into top of backrest.
5. Install in the reverse order

Remove and install headrest guide on front seat

1 - Headrest guide 2 - Head restraint 3 - Front seat backrest M27m4 - Head restraint motor, raise and lower M28m4 - Head restraint motor, raise and lower

Remove:

1. Remove head restraint (2)
2. Remove tensioning element (seat-back lining) from front seat backrest
3. Remove head restraint raise/lower motor (M27m4/M28m4). Push motor to right first and then remove downwards.
4. Release catch at head restraint guide (1) using screwdriver. Push back catch (arrow) at head restraint guide (1) using screwdriver and pull head restraint (1) out upwards.
5. Release catch at head restraint guide (1) using pulling hook. Insert pulling hook into top of head restraint guide (1), push back catch and pull out head restraint upwards.

Install:

1. Insert head restraint guide (1) into backrest frame of front seat backrest (3). Do not damage backrest upholstery. Catch (arrow) must point towards rear.
2. Engage head restraint guide (1) in backrest frame of front seat backrest (3)
3. Install head restraint raise/lower motor (M27m4/M28m4). Insert motor facing upwards and then push to left until it engages in backrest frame.
4. Fit seat-back lining to front seat backrest (3)
5. Install head restraint (2)

DIY How to replace front lumbar supports

• http://www.benzworld.org/forums/w220-s-class/2395441-how-replace-your-front-lumbar-supports.html