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

MODEL 216.3, 221.0 /1 

Shown on model 221 up to 1.6.08 without code (809) Model year 2009 

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

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Bow & Rear SAM Control Unit With Fuse And Relay Module

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	The SAM control unit (2) of the rear SAM control unit with fuse and relay module assembly (N10/2) can be removed or replaced separately. See steps 1 to 8.
1	Temporarily store basic data from SAM control unit (2) in STAR DIAGNOSIS	When replacing the SAM control unit (2). Installation:  Transfer the temporarily stored basic data to the new SAM control unit (2).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
2	Remove rear shelf reinforcement		AR64.10-P-1200SX
3	Switch off ignition and withdraw transmitter key or Keyless Go start/stop button from the EIS [EZS] control unit	Keyless Go start/stop button only for vehicles with code (889) Keyless Go.
4.1	Detach bracket of on-board electrical system battery (G1) and swing on-board electrical system battery (G1) to one side	Model 216.3, 221.0/1 up to 1.6.08 without code (809) Model year 2009
			*BA54.10-P-1027-01C
5	Disconnect electrical connector of luggage compartment Keyless-Go antenna (A2/35)	On vehicles with code (889) Keyless go
6	Remove bolts (1) and pull forward rear SAM control unit with fuse and relay module (N10/2) until the wiring harness (3) and wiring harness (4) is accessible behind the rear SAM control unit with fuse and relay module (N10/2)	Installation:  Ensure that no electrical lines are pinched otherwise there is the danger of damaging the electrical system.
7	Expose wiring harness (3) and wiring harness (4) on the rear panel	Installation:  Observe routing and fixing of wiring harnesses.
8	Unlock SAM control unit (2) (arrows), remove from rear SAM control unit with fuse and relay module (N10/2) and disconnect electrical connectors	When replacing the SAM control unit (2) separately. Number of electrical connectors can vary according to vehicle equipment.
9	Disconnect ground cable	Depending on the battery system fitted, disconnect the corresponding ground lines in order to de-energize the on-board electrical system.	AR54.10-P-0003SX
10	Separate electrical connectors and fuse holders from the rear SAM control unit with fuse and relay module (N10/2)	The number of electrical connectors and fuse holders differs depending on the vehicle equipment.
11	Remove rear SAM control unit with fuse and relay module (N10/2)
12	Unlock SAM control unit (2) (arrows) and remove from 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).
13	Remove bracket from 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).
14	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).
15	Install in the reverse order