Fill and bleed active roll stabilization - AR32.34-P-0021GQ

MODEL 166 with CODE 468 (ACTIVE CURVE SYSTEM) 

MODIFICATION NOTES

8.12.14

Purging method completely changed

Operation steps 1 to 14

Fig 1: Checking Reservoir Using Oil Dipstick

Courtesy of MERCEDES-BENZ USA

	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
	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
	Notes on active roll stabilization		AH32.34-P-0001-01A
	Clean
1	Open engine hood		AR88.40-P-1000GQ
2	Clean cap (1) and surrounding area	Assembly cleaner	*BR00.45-Z-1028-04A
	Check
3	Check hose between expansion reservoir (2) and hydraulic pump for tight seating	The hose must not be able to be twisted. If the hose can be twisted. Replace hose.
4	Remove cap (1) and check fill level on oil dipstick (1a)	The fill level must be at the MAX marking (appropriate for the temperature) on the oil dipstick (1a).
5	Correct fill level	Only when fill level is not level with the MAX marking.
		Filling capacity	*BF32.34-P-1001-01A
		Funnel	Fig 5
6	Start the engine and observe fill level	If the fill level drops. Switch off engine and continue with activity from operation step 5 onwards. The fill level must be stable. If the fill level is stable. Allow engine to idle. Let engine run until the oil in the expansion reservoir (2) is free of bubbles.
	Bleeding
7	Mount pressure pump with pressure hose and adapter to expansion reservoir (2)	Only if the hydraulic pump was replaced.
		Pressure pump	Fig 2
		Pressure hose	Fig 3
		Adapter	Fig 4
8	Apply pressure to ACTIVE CURVE SYSTEM	Only if the hydraulic pump was replaced. The pressure buildup serves to bleed a new hydraulic pump. Apply 1.5 bar to the system.
9	Start bleed routine for ACTIVE CURVE SYSTEM
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		Stop the engine immediately as soon as the hydraulic pump has drawn in oil, and the pressure displayed on the pressure pump's pressure gauge drops. The ACTIVE CURVE SYSTEM could otherwise be damaged. A sufficient quantity of oil must be present in the expansion reservoir (2) throughout the entire procedure. Otherwise, the ACTIVE CURVE SYSTEM may be damaged. Increase the idle speed to 1100 RPM and perform the bleeding routine until bubbles are no longer visible in the expansion reservoir (2). If lots of bubbles are present in the expansion reservoir (2). Stop bleed routine and continue with activity from operation step 5 onwards.
10	Run self-diagnosis	If necessary, the bleeding routine is repeated automatically up to 3 times.
	Check
11	Turn off engine
12	Detach pressure pump and pressure hose from expansion reservoir (2)	Only if the hydraulic pump was replaced.
13	Check and correct fill level in expansion reservoir (2)	The fill level must be at the MAX marking (appropriate for the temperature) on the oil dipstick (1a).
14	Seal expansion reservoir (2)
15	Close engine hood		AR88.40-P-1000GQ
16	Detach diagnostic unit

ACTIVE ROLL STABILIZATION

Number	Designation			MODEL 166
BF32.34-P-1001-01A	Filling capacity	Initial charge	Liter	≈2
		Specification		MB 345.0 Hydraulic Fluid A 001 989 24 03 (Pentosin CHF 11 S Hydraulic Fluid)

Fig 2: Identifying Pressure Pump (124 589 24 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Pressure Hose (124 589 24 21 02)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Adapter (166 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Funnel (126 589 12 63 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1028-04A	Assembly cleaner	-