Remove/install front seat height adjustment drive motor (front, raise/lower) - AR91.29-P-1424V

MODEL 171.4 with CODE (275a) Memory package (driver seat, steering column, mirrors) with CODE (242b) Electrically adjustable front passenger seat with memory 

Fig 1: Identifying Front Seat Height Adjustment Drive Motor Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove left or right front seat (1)		AR91.10-P-1000V
2	Place front seat (1) to the rear on the front seat backrest	When putting down use a suitable protective surface, as otherwise the paint on the backrest frame may be damaged.
3	Undo bolts (2) and remove both fixtures (3) on seat cushion (4)
4	Place seat cushion (4) as far back as possible until the left front seat height adjustment motor (M27/3) or the right front seat height adjustment motor (M28/3) is accessible
5	Remove tie straps (5) and detach electrical connectors (6) on left front seat height adjustment motor (M27/3) or right front seat height adjustment motor (M28/3)	Installation:  Replace tie straps (5).
6	Undo bolts (7) at front and rear and remove left front seat height adjustment motor (M27/3) or right front seat height adjustment motor (M28/3)
7	Install in the reverse order