Remove/install front seat backrest frame - AR91.10-P-3331VA

MODELS 171.4 backrest frame without backrest adjuster 

Fig 1: Identifying Front Seat Backrest Frame Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  caused by backrest suddenly folding forward if release lever is accidentally operated during inspection and repair work	When working on the seat, be careful not to accidentally release the backrest mechanism allowing the seat to fold forward. Keep body parts clear of the backrest travel area.	AS91.00-Z-0005-01V
	Risk of injury.  Injuries may result when performing testing or repair work on airbag or emergency tensioning retractor units.	Store airbag units with deployment side facing up; do not expose to temperatures greater than 100°C. When working on these units, disconnect the power supply.
1	Remove the left or right front seat		AR91.10-P-1000V
2	Remove the backrest upholstery from the left or right front seat	On vehicles without code (873) heated seats, left and right front seats	AR91.10-P-1090V
		On vehicles with code (873) heated seats, left and right front seats	AR91.10-P-1090VA
3	Remove the tie strap (2). Disconnect the electrical connector (3) and ground line (4) at the driver sidebag squib (R12/9) or the front passenger sidebag squib (R12/10)	Installation:  replace tie straps (2).
4.1	Separate electrical connectors (8)	Only on vehicles with code (403) Airscarf system
5	Remove the screws (5) at the driver sidebag squib (R12/9) or front passenger sidebag squib (R12/10)		*BA91.60-P-1015-01A
6.1	Remove front seat sidebag unit	Only when installing a new backrest frame (1).	AR91.60-P-0695V
7.1	Remove the screws (7) and then remove the left AIRSCARF fan motor (M4/10) or right AIRSCARF fan motor (M4/11)	Only when installing a new backrest frame (1) on vehicles with code (403) Airscarf system. Take care not to damage the paint on the backrest frame (1), otherwise the backrest frame (1) may corrode.
		Repair any paint damage in places that will not be visible later with a touch-up pencil.	*BR00.45-Z-1012-07A
		Paint damage in visible areas of the backrest frame (1) cannot be touched up. If necessary, the backrest frame (1) must be replaced.
8.1	Remove head restraint guides (9)	Only when installing a new backrest frame (1). Take care not to damage the paint on the backrest frame (1), otherwise the backrest frame (1) may corrode.
		Repair the paint damage in places that will not be visible later with a touch-up pencil. Paint damage in visible areas of the backrest frame (1) cannot be touched-up. If necessary, the backrest frame (1) must be replaced.	*BR00.45-Z-1012-07A
9.1	Install the driver seat on the clamping device	Only on vehicles without code (275a) memory package (driver seat, steering column, mirror)	AR91.10-P-3331-01V
			Figure
10.1	Install the front passenger seat on the clamping device	Only on vehicles without code (242b) front passenger seat, electrically adjustable with memory	AR91.10-P-3331-01V
			Figure
11	Remove the screws (6) at the backrest frame (1) on both left and right sides	Take care not to damage the paint on the backrest frame (1), otherwise the backrest frame (1) may corrode.
		Repair the paint damage in places that will not be visible later with a touch-up pencil. Paint damage in visible areas of the backrest frame (1) cannot be touched-up. If necessary, the backrest frame (1) must be replaced.	*BR00.45-Z-1012-07A
			*BA91.10-P-1018-01A
12	Remove the backrest frame (1)
13	Install in the reverse order

FRONT SEATS

Number	Designation		Model 171
BA91.10-P-1018-01A	Screw, backrest adjuster to backrest frame	Nm	37

AIRBAG

Number	Designation		Model 171
BA91.60-P-1015-01A	Screw for sidebag unit	Nm	10

Fig 2: Identifying Clamping Device (171 589 00 31 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1012-07A	Touch-up pencil	A 000 986 27 50