Remove/install air suspension control unit - AR32.22-P-6000GZ

MODEL 164, 166 with CODE 489 (Airmatic (air suspension with level adjustment and adaptive damping system ADS)) 

Shows model 164 

Fig 1: Identifying Air Suspension Control Unit Remove/Install Components - Shown On Model 164

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Read out coding of AIRmatic control unit (N51) using STAR DIAGNOSIS
			AD00.00-P-2000-04A
		When replacing AIRmatic control unit (N51), insofar as it cannot yet be read out
2	Remove front left floor covering (1)	MODEL 164	AR68.20-P-2050GZ
		MODEL 166	AR68.20-P-2050GQ
3	Unscrew nuts (2) and remove intermediate bottom (3)
4	Disconnect electrical connectors (4)
5	Unscrew nuts (5) and remove AIRmatic control unit (N51)
6	Install in the reverse order
7	Code AIRmatic control unit (N51) using STAR DIAGNOSIS	When replacing AIRmatic control unit (N51)
8	Check vehicle level at front and rear axle, adjust it and store normal level in AIRmatic control unit (N51) again	When replacing AIRmatic control unit (N51)
9	Perform basic programming		AR00.19-P-0200GZ