Fill up and vent the Active-Body-Control (ABC) system - AR32.50-P-0021SX

MODEL 216, 221.0 /1 with CODE (487) Active Body Control (ABC) 

Fig 1: Identifying Tandem Pump, Bleed Screws, ABC Expansion Reservoir, Dipstick, ABC Front And Rear Axle Valve Unit

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

25.8.05

Waiting time changed from 5 to 10 minutes

Step 9

	Fill
	Risk of injury  to skin or eyes caused by hydraulic fluid spraying out under high pressure. Risk of poisoning  caused by swallowing hydraulic fluid	Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses.	AS00.00-Z-0013-01A
	Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it moving off. Wear closed and close-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
	Notes on Active Body Control suspension		AH32.50-P-0001-01N
1	Insert dipstick (2a) all the way into the expansion reservoir (2), pull out again, read off hydraulic fluid level and correct if necessary	The funnel with filter must not be used for pouring in other operating fluids. To help prevent contaminants from entering and damaging the ABC system, always store this filter-equipped funnel in a locked cabinet. Read off the hydraulic fluid level on the dipstick (2a) on the side with the inscription "ENGINE OFF UNLADEN". The fluid level must be between the "MIN" and "MAX" marks. The vehicle must be ready to drive and standing horizontally on its wheels.
			*126589126300
			*BF32.50-P-1001-01A
2	Start engine	The hydraulic fluid level in the expansion reservoir (2) must be observed throughout the entire process (2nd person required). It must not drop below the "MIN" mark. The tandem pump (1) must not draw in air under any circumstances otherwise it will be damaged. When replacing the tandem pump (1) the engine must run for at least 2 minutes before the vehicle level adjustment button may be operated.
3	Press vehicle level adjustment button repeatedly until indicator lamp in button goes out	Vehicle level "Normal".
4	Insert dipstick (2a) all the way into the expansion reservoir (2), pull out again, read off hydraulic fluid level and correct if necessary	Read off the hydraulic fluid level on the dipstick (2a) on the side with the inscription "ENGINE ON UNLADEN". The fluid level must be between the "MIN" and "MAX" marks.
	Bleeding
5	Pressurize the ABC system manually	When replacing the tandem pump (1). The vehicle must be ready to drive and standing horizontally on its wheels.	AR32.50-P-0021-01N
			*124589242100
6	Press vehicle level adjustment button repeatedly until indicator lamp in button illuminates	Vehicle level "High".
7	Press vehicle level adjustment button repeatedly until indicator lamp in button goes out	LU Vehicle level "Normal". Steps 6 and 7 must be repeated 3 times. Following removal, installation or replacement of suspension struts or valve units, steps 6 and 7 should be repeated approx. 15 times.
8	Turn off engine
9	After a waiting time of approx. 10 minutes, pull the dipstick (2a) out of the expansion reservoir (2) and wipe off with a lint free cloth	Always wait for 10 minutes because the hydraulic fluid only flows back into the expansion reservoir (2) slowly and otherwise the measured value will be distorted.
10	Insert dipstick (2a) all the way into the expansion reservoir (2), pull out again, read off hydraulic fluid level and correct if necessary	Read off the hydraulic fluid level on the dipstick on the side with the inscription "ENGINE OFF UNLADEN". The fluid level must be between the "MIN" and "MAX" marks.
11	Check ABC system for leaks and function

ACTIVE BODY CONTROL

Number	Designation			Model 216	Model 221
BF32.50-P-1001-01A	Filling capacity	Initial charge	Liters	≈4	≈4
		Specifications for Operating Fluids	Sheet	BB00.40-P-0345-00 A	BB00.40-P-0345-00 A

Fig 2: Identifying Funnel (126 589 12 63 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Pressure Pump (124 589 24 21 00)

Courtesy of MERCEDES-BENZ USA