Empty/fill electrohydraulic suspension

AR32.50-P-0042ME

Empty/fill electrohydraulic suspension

06.07.2020

Model

167

with code 489 (AIRMATIC)

with code 490 (Electrohydraulic suspension)

Modification notes

13.03.2020

"Pressure release of electrohydraulic suspension", changed.

Operation step 7

13.03.2020

Pressure buildup of electrohydraulic suspension, changed.

Operation step 8

06.07.2020

Filling capacity

Type 167

BF32.50-P-1001-02A

Shown on front axle

1

Caps

2

Dust caps

Shown on rear axle

1

Caps

2

Dust caps

Shown on shock absorber (7) of rear axle

3

Shutoff valve

6

Connection fitting

4

Shutoff valve

7

Shock absorber

5

Connection fitting

 Warning

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

Topical note

Information on E-ACTIVE BODY CONTROL suspension

AH32.50-P-0002-01ME

Notes on safety-relevant components

AH00.00-Z-0019-01A

Draining

1

Connect diagnostic system.



AD00.00-P-2000-06ME

2

Move front wheels to straight-ahead position.

3

Lift vehicle with vehicle lift.

AR00.60-P-1006A

4

Remove trim on rear left and right transverse control arm.

If hydraulic pressure lines of electrohydraulic suspension on rear axle are emptied.

5

Remove cover caps (1) of shutoff valves (3, 4).

6

Remove dust caps (2) of connection fittings (5, 6) completely.

7

Drain the hydraulic pressure lines of the electrohydraulic suspension using guided diagnosis.



000 588 03 82 00 Filling unit

WS32.00-P-0032B


Prior to each procedure emptying the hydraulic pressure lines, the shutoff valves (3, 4) of the respective shock absorber (7) must be screwed in up to the end stop (arrows D).
The hydraulic pressure in the shock absorber (7) must not fall.

 It is only by closing the shutoff valves (3, 4) that hydraulic pressure in the shock absorber (7) is maintained. It is not possible to fill the shock absorbers (7).

 Shutoff valve to shock absorber

*BA32.50-P-1006-04A

If the hydraulic pressure cannot be reduced using the diagnostic system:



Reduce hydraulic pressure manually.

Manually release pressure in hydraulic system of electrohydraulic suspension with intact shutoff valve

AR32.50-P-0015-01ME

 Shutoff valve to shock absorber

*BA32.50-P-1006-04A

If shutoff valves (3, 4) on shock absorber (7) cannot be closed,



Release hydraulic pressure in hydraulic lines and replace shock absorbers (7).

Manually release pressure in hydraulic system of electrohydraulic suspension with defective shutoff valve

AR32.50-P-0015-02ME

Remove/install the suspension strut
Model 167
with code 489 (AIRMATIC)
with code 490 (Electrohydraulic suspension)

AR32.25-P-1017MEH

Remove/install rear shock absorber
Model 167
with code 489 (AIRMATIC)
with code 490 (Electrohydraulic suspension)

AR32.25-P-0110MEH

If connection fittings (5, 6) are damaged,



replace connection fittings (5, 6).

AR32.50-P-0009-01ME

 Connection fitting to shock absorber

*BA32.50-P-1009-04A

Preservation agent, 400 ml

*BR00.45-Z-1030-05A

Filling

8

Fill hydraulic pressure lines of electrohydraulic suspension using guided diagnosis.



000 588 03 82 00 Filling unit

WS32.00-P-0032B


After each filling procedure, the shutoff valves (3, 4) must be unscrewed up to the end stop (C).
Otherwise the hydraulic circuit will not be connected to the hydraulic pump.

 Shutoff valve to shock absorber

*BA32.50-P-1006-04A

 Filling capacity

*BF32.50-P-1001-02A

9

Attach cover caps (1) of shutoff valves (3, 4).

10

Install dust caps (2) of connection fittings (5, 6).

11

Install trim on rear left and right transverse control arm.

If hydraulic pressure lines of electrohydraulic suspension on rear axle have been emptied.

12

Lower vehicle.

AR00.60-P-1006A

13

Disconnect diagnostic system.



AD00.00-P-2000-06ME

 Electrohydraulic suspension

Number

Designation

Model 167
with code 490 (Electrohydraulic suspension)

BA32.50-P-1006-04A

Shutoff valve to shock absorber

Nm

5

 Electrohydraulic suspension

Number

Designation

Model 167
with code 490 (Electrohydraulic suspension)

BA32.50-P-1009-04A

Connection fitting to shock absorber

Stage 1

Nm

10

Stage 2

(release and tighten again)

Nm

10

Stage 3

(release and tighten again)

Nm

6

 Electrohydraulic suspension

Number

Designation

Model 167

BF32.50-P-1001-02A

Filling capacity

with complete refill

Liter

1,2

Sheet

BB00.40-P-0345-00A

Repair materials

Number

Designation

Order number

BR00.45-Z-1030-05A

Preservation agent, 400 ml

A 000 986 32 01