Remove/install level control valve unit - AR32.31-P-0650RT

MODEL 251 

Fig 1: Identifying Level Control Valve Unit Remove/Install Components - Shown On Model 251 With Code (489)

Courtesy of MERCEDES-BENZ USA

Shown on model 251 with code (489) AIRmatic (air suspension with level adjustment and adaptive damping system ADS), 

Pressure line connections: 

Shown on model 251 with code (488) Steel/air suspension 

Fig 2: Identifying Level Control Valve Unit Remove/Install Components - Shown On Model 251 With Code (488)

Courtesy of MERCEDES-BENZ USA

Pressure line connections: 

	Remove/install
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on AIRmatic		AH32.22-P-1000-02RT
1	Remove front bumper		AR88.20-P-2000RT
2	Empty air suspension system using STAR DIAGNOSIS
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
3	Disconnect electrical connector (2)
4	Unscrew pressure line connection (1)	Observe color coding on the pressure lines and the pressure line assignment at the valve unit (Y36 or Y36/8) in order to guarantee faultless function of the suspension. Seal off pressure lines with blind plugs for the duration of the repair work.
			*BA32.22-P-1003-03C
		Set of stop plugs	Fig 3
		Socket wrench bit	Figure
		Knife	Figure
		Leak detection spray	*BR00.45-Z-1002-03A
		for USA If pressure line connections or pressure lines are damaged, see: ↓	*BR00.45-Z-1004-03A
		Repair pressure line connection, see Repair AIRmatic pressure line connection	AR32.22-P-2001-02RT
		Socket wrench bit	Figure
		Knife	Figure
		Leak detection spray	*BR00.45-Z-1002-03A
		for USA	*BR00.45-Z-1004-03A
5	Remove bolts (4)	Secure valve unit (Y36 or Y36/8) against falling down.
6	Remove bolts (3) and detach valve unit (Y36 or Y36/8)	Use a suitable tool.
7	Remove valve unit (Y36 or Y36/8)
8	Install in the reverse order
9	Fill air suspension system using STAR DIAGNOSIS	The wheels must not make contact with the floor when filling as the air spring bellows in the suspension strut will be irreparably damaged if the system is filled with the suspension compressed.
	Checking
10	Check air suspension system for leaktightness	Refer to: ↓
		Check AIRmatic for leaks	AR32.22-P-8100RT

Fig 3: Identifying Set Of Stop Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Slitting Knife (000 589 12 28 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Wrench Socket (211 589 00 09 00)

Courtesy of MERCEDES-BENZ USA