Remove/install rear suspension valve body - AR32.50-P-0002RK

MODEL 231 with CODE 487 (Active Body Control (ABC))

Shown on left side of vehicle

Fig 1: Rear Suspension Valve Body Remove/Install Components - Shown On Left Side Of Vehicle

Courtesy of MERCEDES-BENZ USA

	Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure. Risk of poisoning from swallowing hydraulic fluid.	Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.	AS00.00-Z-0013-01A
	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on fitting hydraulic lines and hoses		AH32.50-P-0001-02A
	Notes on Active Body Control suspension		AH32.50-P-0001-01N
	Notes on Active Body Control suspension		AH32.50-P-0001-01LF
	Remove/install
1	Detach left rear wheel
	Remove/install wheels, rotate if necessary		AP40.10-P-4050EW
2	Remove fender liner in the rear left fender		AR88.10-P-1400RK
3	Remove insulating bag (7)
4.1	Relieve pressure in rear axle ABC system using the bleed screws	MODEL 231.### ## up to 021273 with CODE 487 (Active Body Control (ABC)) Catch hydraulic fluid in a suitable container.	AR32.50-P-0001-01N
		Bleed screw on soldered fitting in hydraulic line	*BA32.50-P-1001-02B
4.2	Release pressure in ABC system using Star Diagnosis	MODEL 231.### ## as of 021274 with CODE 487 (Active Body Control (ABC))	AR32.50-P-0001-01LF
			AD00.00-P-2000-04A
5	Remove strut (1)
6	Release underfloor paneling in rear area	Remove/install underbody paneling	AR61.30-P-1001RK
7	Remove bracket (3)
8	Remove screws/bolts (6) and remove hydraulic lines (4)	Before opening the hydraulic system, thoroughly clean the area surrounding the separation point. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the hydraulic system. Ensure that no dirt enters the open hydraulic lines (4). This can result in failure of the ABC system. Check sealing rings for damage and replace if necessary. Check support rings for damage and replace the complete hydraulic line (4) if necessary. Note the installation position of the hydraulic lines (4). Bolt, line to rear axle valve unit	*BA32.50-P-1007-01C
9	Seal hydraulic lines (4) and openings on rear axle ABC valve unit (Y36/2) using stop plugs	Record plug	Figure
10	Separate hydraulic lines (4) using detaching tool on quick-release couplings (2)	Ensure that no dirt enters the open quick- release couplings (2). This can result in failure of the ABC system. Make sure that the quick- release couplings (2) engage completely. Install lines free of tension. Detaching tool	Figure
		Detaching tool	Fig 3
11	Unscrew nut (9)	Nut, bracket for valve unit on rear axle to rubber-bonded metal buffer	*BA32.50-P-1012-01C
12	Loosen bolt (5)	Bolt, bracket to valve unit on rear axle	*BA32.50-P-1010-01C
13	Disconnect electrical connector (8)
14	Pull out rear axle ABC valve unit (Y36/2) slightly and disconnect electrical connections (10)	Before detaching the electrical connections (8, 10), check whether the color coding on the rear axle ABC valve unit (Y36/2) and the electrical connections (8, 10) are present. Otherwise, if incorrectly mounted, the rear axle ABC valve unit (Y36/2) may be destroyed or malfunction. Warning: Risk of accident! Only pull out the rear axle ABC valve unit (Y36/2) back until the electrical connections (10) are accessible. Disconnect cable tie, if any. The electrical plugs and connections on the rear axle ABC valve unit (Y36/2) are color-coded relative to each other, and they must not be mixed up.
15	Remove rear axle ABC valve unit (Y36/2) to the rear
16	Detach hydraulic lines (4) from rear axle ABC valve unit (Y36/2)	When replacing rear axle ABC valve unit (Y36/2) Check sealing rings for damage and replace if necessary. Check support rings for damage and replace the complete hydraulic line (4) if necessary. Bolt, line to rear axle valve unit	*BA32.50-P-1007-01C
17	Install in the reverse order
18	Replace stop plugs in removed rear axle ABC valve unit (Y36/2) with plugs	When replacing rear axle ABC valve unit (Y36/2) Caps are supplied with new part.
19	Fill and bleed ABC system		AR32.50-P-0021SX