Remove/install SAM control unit with fuse and relay box in trunk - AR54.21-P-1258CY

MODEL 204.9 

Fig 1: Identifying SAM Control Unit With Fuse And Relay Box In Trunk Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying SAM Control Unit With Fuse And Relay Box In Trunk Remove/Install Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Buffer the basic data of the rear SAM control unit with fuse and relay module (N10/2) in STAR DIAGNOSIS	When replacing the rear SAM control unit with fuse and relay module (N10/2).
		Transmit buffered basic data.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
2	Switch off ignition and remove transmitter key or KEYLESS-GO start/stop button from electronic ignition lock control unit	KEYLESS-GO start/stop button only with code (889) Keyless-Go
3	Remove front load compartment floor (1)		AR68.80-P-5800CY
4	Unscrew nuts (2) from bracket (3)
5	Unscrew nut (8) from bracket (3)
6	Unclip electrical wiring harness (4) from bracket (3) (arrow A)
7	Release fuse holders (6, 7 and 9) on rear SAM control unit with fuse and relay module (N10/2) (arrows C) and remove	The procedure for releasing the fuse holders (6, 9) is shown using fuse holder (7) as an example.
8	Unscrew bolts (5) from bracket (3)
9	Lift bracket (3) and rear SAM control unit with fuse and relay module (N10/2)	Ensure that no electrical lines are pinched otherwise there is the danger that the electrical system will be damaged.
10	Remove rear SAM control unit with fuse and relay module (N10/2) by swiveling it out of the bracket (3)	Ensure that the guide pin (arrow B) of the rear SAM control unit with fuse and relay module (N10/2) is correctly seated in the bracket (3).
11	Disconnect all electrical connectors and unclip fuse holders (10, 11) of rear SAM control unit with fuse and relay module (N10/2) (arrows C). Then remove rear SAM control unit with fuse and relay module (N10/2).	The electrical connectors which conduct circuit 30 must be disconnected first and contacted last in order to avoid short circuits. Fuse holder (10) (with code (220) Parktronic system (PTS) or code (890) EASY-PACK liftgate or code (U80) 115V power outlet in cargo area). Fuse holder (11) with code (550) Trailer hitch The procedure for releasing the fuse holders (10, 11) is shown using fuse holder (7) as an example.
12	Compare the fuse and relay fittings of the new rear SAM control unit with fuse and relay module (N10/2) with that of the old rear SAM control unit with fuse and relay module (N10/2) and adapt fittings if necessary	When replacing the rear SAM control unit with fuse and relay module (N10/2).
13	Install in the reverse order