Remove/install front seat - AR91.10-P-1000W

MODEL 172.4 

Shown with code (275) Memory package for electrically adjustable front seats 

Fig 1: Identifying Front Seat Remove/Install Components - Shown With Code (275)

Courtesy of MERCEDES-BENZ USA

	Risk of injury  during testing and repair operations related to pyrotechnical components	Do not expose pyrotechnical components to temperatures above 100 °C or 212 °F Disconnect current supply when working on such components.	AS91.00-Z-0008-01A
	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
	Information, assessment and legal requirements when working with, handling and storing pyrotechnical components		AH91.00-Z-0000-10A
	Notes on seat occupied recognition		AH91.60-P-0760-01P
	Information on machining/treating magnesium components		AH60.00-P-0023-01R
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Assessment of airbag and belt tensioner units in accident vehicles		AH91.00-P-0006-01B
	Legal requirements on handling and storing airbags and emergency tensioning retractor units		AH91.00-P-0004-01A
	Remove/install
1	Open Vario roof fully
2	Move left or right seat (1) upward and toward front
3	Move backrest to front
4	Remove safety clip (2), remove belt end fitting (3), and extend seat belt (4) on seat (1)
5	Remove screws/bolts (5) from guide rails	Bolt, seat to vehicle floor	*BA91.10-P-1007-01A
6	Move seat (1) to rear
7	Move backrest to rear
8	Remove screws/bolts (6) from guide rails	Bolt, seat to vehicle floor	*BA91.10-P-1007-01A
9	Disconnect battery ground line		AR54.10-P-0003W
10	Separate frame floor assembly/driver seat airbag connecting point (X28/29), or frame floor assembly/front passenger seat airbag connecting point (X28/30) at bottom of seat (1)	The number of electrical connectors depends on the equipment installed.
11	Separate driver seat connector block (X55/3), or front passenger seat connector block (X55/4) at bottom of seat (1)	The number of electrical connectors depends on the equipment installed.
12	Disconnect electrical connector (7) from driver seat control unit (N32/1) or front passenger seat control unit (N32/2)	On vehicles with code (275) Memory package for electrically adjustable front seats
13	Remove seat (1) from vehicle	Carefully remove seat (1) from vehicle. Otherwise, components in vehicle interior will be damaged. Helper required. Ensure that lock pins of guide rails in vehicle floor are seated correctly.
14	Release and remove covers from guide rails
15	Position seat (1) and secure against tipping over
16	Install in the reverse order