Removing and installing SAM control unit with fuse and relay box in trunk - AR54.21-P-1258V

MODEL 171.4 

Fig 1: Identifying SAM Control Unit With Fuse And Relay Box In Trunk Components

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

12.4.05

Disconnect ground cable of battery deleted

Step 3

	Remove/install
	Risk of fire and explosion  caused by machining/treating magnesium components	Keep away from ignition sources and open flames.	-
	Information on machining/treating magnesium components		-
1.1	Stage basic data from rear SAM control unit with fuse and relay module (N10/2) in STAR DIAGNOSIS	Only when installing new the rear SAM control unit with fuse and relay module (N10/2). Installation:  Transfer temporarily stored basic data to the new rear SAM control unit with fuse and relay module (N10/2).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS diagnosis system	*WH58.30-Z-1048-13A
2	Remove bottom center trunk paneling		AR68.30-P-4810V
3.1	Unscrew bolts (3) from bracket (4)	On vehicles with code (527) COMAND APS (with navigation) or with code (498) Japanese version
		Power screwdriver/drill	*WH58.30-Z-1007-20A
			*BA54.21-P-1005-01A
4	Remove bolts (1)	Observe various bolt lengths (1)
		Power screwdriver/drill	*WH58.30-Z-1007-20A
			*BA54.21-P-1005-01A
5	Move beverage holder (2) toward rear
6	Separate electrical connectors (6) and concealed electrical connector (arrow)	The electrical connector (6) leading circuit 30 must be disconnected first and contacted last. Number of electrical connectors (6) according to equipment.
7	Release and disconnect electrical connectors (5).
8	Press hooks (7) on the fuse holder (8) outwards and remove fuse holder (8)	Number of fuse holders (8) varies depending on equipment configuration.
9	Unscrew bolts (9) and remove rear SAM control unit with fuse and relay module (N10/2) from the equipment carrier (2)
10.1	Check fuse and relay assignment at rear SAM control unit with fuse and relay module (N10/2)	Only when installing new the rear SAM control unit with fuse and relay module (N10/2).
	Fuse assignment of fuse and relay box in trunk		GF54.15-P-1256-06SK
	Relay assignment of fuse and relay box in trunk		GF54.15-P-1257-04SK
11	Install in the reverse order

CONTROL UNITS

Number	Designation		Model 171
BA54.21-P-1005-01A	Bolt, equipment carrier to body, retractable partition bracket and tank partition wall	Nm	10

COMMERCIALLY AVAILABLE TOOLS

Number	Designation
WH58.30-Z-1048-13A	STAR DIAGNOSIS diagnosis system, Compact Passenger Car	6511 1801 00
WH58.30-Z-1007-20A	Cordless drill/driver