Remove/install suspension (ADS) control unit - AR32.32-P-0500RT

MODEL 251 with CODE (489) Airmatic (air suspension with level adjustment and adaptive damping system ADS)

Fig 1: Identifying Suspension (ADS) Control Unit Remove/Install Components - Shown On Model 251.1

Courtesy of MERCEDES-BENZ USA

Shown on model 251.1

MODIFICATION NOTES

4.8.06

Disconnect ground line - discontinued

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Read out coding from AIRmatic with ADS control unit (N51) using STAR DIAGNOSIS diagnosis system	Only if the AIRmatic with ADS control unit (N51) is replaced and if it cannot yet be read out using the STAR DIAGNOSIS diagnosis system.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
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 clips (3)	Do not mix up nuts (2) and nuts (4). Pay attention to correct seat of clips (3)
5	Remove intermediate bottom (5)
6	Separate electrical connectors (6)
7	Undo nuts (7) and remove the AIRmatic with ADS control unit (N51)
8	Install in the reverse order
9	Code AIRmatic with ADS control unit (N51) using STAR DIAGNOSIS diagnosis system	Only when installing a new AIRmatic with ADS control unit (N51).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
10	Check vehicle level at front and rear axle using STAR DIAGNOSIS diagnosis system, adjust and store normal level in AIRMATIC with ADS control unit (N51) again	Only when installing a new AIRmatic with ADS control unit (N51).
11	Perform basic programming		AR00.19-P-0200RT