Remove/install passenger seat - AR91.10-P-1020MCU

MODEL 451.3/4 

Fig 1: Identifying Passenger Seat Remove/Install Components

Courtesy of MERCEDES-BENZ USA

Shown on vehicle with code (S17) seat heater (FFO) 

Fig 2: Identifying Passenger Seat Remove/Install Components - Shown On Vehicle With Code (S17) Seat Heater (FFO)

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
1	Disconnect ground line of battery		AR54.10-P-0003MCC
2	Unhook seat belt (3) from belt guide (2) at front passenger seat (1)
3	Move front passenger seat (1) forward and fold over backrest
4	Unclip and remove cover (7)
5	Release wiring harness from bracket (6) and remove belt tension sensor connection (B48/3x1)	Pay attention to installation position (arrow) of wiring harness.
6	Remove bolt (5) from lower belt end fitting of seat belt (3)		*BA91.40-P-1001-01G
7	Remove bolts (8)	Push front passenger seat (1) backwards slightly to ensure that it has audibly engaged into both seat rails. Screw in bolts (8) up to contact surface, tighten right bolt first, then tighten left bolt (8). Move front passenger seat (1) to rearmost position, tighten left bolt and then tighten right bolt (4).
			*BA91.10-P-1001-01P
8	Move front passenger seat (1) to rearmost position and remove bolts (4)	Push front passenger seat (1) forwards slightly to ensure that it has audibly engaged into both seat rails. Set seat backrest to vertical position. Screw in bolts (4) up to contact surface and move front passenger seat (1) to foremost position.
9	Tilt front passenger seat (1) backwards and expose wiring harness at bracket (9)
10	Disconnect front passenger seat heated cushion connector (X28/5)	On vehicles with code (S17) Seat heaters (FFO)
11	Disconnect front passenger seat connector block (X55/4), front passenger head/thorax bag connector (X28/7) and 2-pin front passenger seat ETR connector (X28/9)	No other connectors must be disconnected, otherwise a new supporting seat frame must be installed.
12	Remove front passenger seat (1) from vehicle	Carefully remove front passenger seat (1) out of vehicle with a helper, as otherwise trim parts and detachable parts may be damaged.
13	Install in the reverse order
14	Program new blank value for seat occupied recognition and check supplemental restraint system using STAR DIAGNOSIS
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04MCC