Seat Adjustment, Basic Function - GF91.00-P-9901A

Model all (CAR) 

Mechanical seat adjustment on driver's seat (example illustration) 

Courtesy of MERCEDES-BENZ USA

Overview 

This document contains information on:

• General
• Mechanical seat adjustment
• Partially electric seat adjustment

General 

The seat adjustment is used to adapt the seat to the body size of the respective vehicle occupants. A correct seat position ensures seat comfort and safety.

The various seat adjustments can be carried out mechanically or electrically.

In addition, components for improving comfort can be installed, such as massage functions or a lumbar support adjustment, for individual adjustment of the seat backrest padding for the vehicle occupants.

Mechanical seat adjustment 

The mechanical seat adjustment is adjusted by lever or handwheels.

The following seat adjustments can be conducted mechanically:

• Seat fore-and-aft position
• Seat cushion length
• Seat cushion inclination
• Seat height
• Backrest inclination
• Head restraint height
• Head restraint inclination

Partially electric seat adjustment 

For partially electric seat adjustment, not all adjustments are made using the lever or handwheels. For partially electric seat adjustment, the following seat adjustments can be operated electrically using switches on the seat depending on the given model and equipment involved:

• Seat height
• Backrest inclination
• Seat cushion inclination
• Seat cushion length

	Further basic functions
	Lumbar support adjustment, basic function	Vehicles with code U22 (4-way lumbar support)	GF91.00-P-9902A
	Front seat electrical seat adjustment, basic function	Model 167, model 223 and vehicles with code 221 (Electrically adjustable driver's seat, left), with code 222 (Electrically adjustable front seat, right), with code 241 (Electrically adjustable driver's seat with memory, left), with code 242 (Electrically adjustable driver's seat with memory, right), with code 275 (Memory Package (driver's seat, steering column and mirrors)) or with code 278 (Fully electric front seat)	GF91.10-P-9900A
	Memory function, basic function	Model all (CAR) with code 241 (Left electric adjustable driver's seat with memory) Model all (CAR) with code 242 (Right electric adjustable driver's seat with memory) Model all (CAR) with code 275 (Memory Package (driver's seat, steering column and mirror)) Model all (CAR) with code 276 (Memory feature in rear)	GF91.10-P-9901A
	Rear passenger compartment electrical seat adjustment, basic function	Model 167 with code 224 (Individual rear seat system design) or code 226 (7-seater with 3rd seat row) or code 453 (Reclining rear seats in rear passenger compartment) or code 567 (Vario rear bench seat) or code 845 (Electric folding 3rd seat row), model 213 as model year 2021 with code 223 (Electric rear seat backrest adjustment and head restraints), model 223 with code 223 (Electric rear seat backrest adjustment and head restraints) or code 453 (Rear reclining seats), model 293, model 297 with code 223 (Electric rear seat backrest adjustment and head restraints)	GF91.12-P-9900A
	Multicontour seat, basic function	Vehicles with code 399 (Front multicontour seats with massage function) or with code 406 (Rear multicontour seats) or with code 409 (Left/right front multicontour seats) or with code 432 (Left and right dynamic multicontour seat)	GF91.25-P-9900A