Remove/Install SAM Control Unit With Fuse And Relay Box In Trunk - AR54.21-P-1258W

Model 172.4 

Fig 1: SAM Control Unit With Fuse And Relay Box In Trunk Components Location - Model 172.4

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Connect Star Diagnosis and perform initial startup of rear SAM control unit with fuse and relay module (N10/2)	When replacing the rear SAM control unit with fuse and relay module (N10/2).	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 on vehicles with code (889) Keyless-Go.
3	Remove center paneling (1)		AR68.30-P-4600W
4	Unscrew bolt (6) from bracket (5)
5	Swivel rear SAM control unit with fuse and relay module (N10/2) to rear and remove with shackle (8) from bracket (5)	: Make sure that no electrical lines are trapped by or rub against the carrier plate. There is otherwise a risk of damage to the electrical lines. Make sure that no electrical lines are jammed. Otherwise the electrical system may be damaged.
6	Detach all electrical connections from rear SAM control unit with fuse and relay module (N10/2) and unclip fuse holder (7) from rear SAM control unit with fuse and relay module (N10/2)	The permanent current of the electrical connections (2, 3) carrying current must be detached first and contacted last. Otherwise short circuits may occur. The number of electrical connectors and fuse holders (7) depends on the vehicle equipment. Unlock electrical connectors (2, 3) by pressing back the shackles using an extraction hook (arrows A, B) and detach.
		Pulling hook The contact blade (4) must make contact all the way forward in the connector housing of the electrical connectors (2, 3).	Fig 2
7	Compare the components of the new rear SAM control unit with fuse and relay module (N10/2) with those of the old rear SAM control unit with fuse and relay module (N10/2), if necessary adapt components to the respective vehicle equipment accordingly	When replacing the rear SAM control unit with fuse and relay module (N10/2).
8	Install in the reverse order

Fig 2: Identifying Extraction Hook (140 589 02 33 000)

Courtesy of MERCEDES-BENZ USA