Remove/install front SAM control unit - AR54.21-P-1254RT

MODEL 251 

Fig 1: Identifying Front SAM Control Unit Remove/Install Components

Courtesy of MERCEDES-BENZ USA

Shown on vehicle with AIRmatic (air suspension with level adjustment and Adaptive Damping System ADS), code 489 

	Remove/install
	Notes on avoiding damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Read out coding from front SAM control unit (N10)	Only when replacing the front SAM control unit (N10) and if it can still be read out using STAR DIAGNOSIS.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS diagnosis system	*WH58.30-Z-1048-13A
2	Remove front floor covering	Right side of vehicle	AR68.20-P-2070RT
3	Remove impact absorber (1)
4	Unscrew nuts (2, 4) and remove intermediate bottom (5)	Do not mix up nuts (2) and nuts (4). Pay attention to correct seat of clips (3)
		Cordless drill/driver	*WH58.30-Z-1007-20A
5	Remove micromechanical turn rate sensor AY pickup (B24/15)		AR42.45-P-0841RT
6	Detach electrical connectors (6, 7) from front SAM control unit (N10)
7	Unscrew bolts (8) and remove front SAM control unit (N10)	Insert retaining clamps (9) into the corresponding openings, then attach the front SAM control unit (N10) with bolts (8).
8	Install in the reverse order
9	Code front SAM control unit (N10)	Only when installing a new front SAM control unit (N10).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS diagnosis system	*WH58.30-Z-1048-13A