Front Suspension

Air Spring Damper, Filling

Special tools, testers and auxiliary items required

• Adapter (T10157)

• Air Suspension Strut Charger (VAS 6231)

• Steel gas bottle filled with argon or Corgon

• Air spring shock absorbers are supplied as replacement parts with a minimum pressure. By sitting in storage for extended periods this pressure can diminish (just like a tire). This minimum pressure must be checked and if necessary restored by "recharging" before air spring shock absorber is removed from the packaging. If air spring shock absorber is removed from the packaging without this checking/recharging, this may cause indentations or kinks to form in the dust boot before it reaches its normal shape. These folds can cause damage and premature failure of the air spring damper.

- Remove the cover from the packaging.

- Remove union bolt - arrow - from the residual pressure holding valve.






- Close the valve of the steel gas bottle.

- Become familiar with the relevant rules for the prevention of accidents for pressurized containers and technical gases.

- Connect the (VAS 6231) and (T10157) as shown in the illustration.






1. Air spring shock absorber in packaging

2. Steel gas bottle for argon, Corgon with gauges

3. (VAS 6231)

4. (T10157)


• Refilling the suspension strut (air suspension) may only be performed with the gases from the top to prevent any "uncleaned" air from getting into the air suspension system.

- Set flow rate limiter gauge to 2.0 liters/min - arrow -.






- Now fill gas into air spring shock absorber approximately up to 5.0 bar using several individual pressure bursts.






- Disconnect the (VAS 6231) from the (T10157). When doing this, gas will escape at a pressure greater than 3.5 bar.

Minimum pressure is now reestablished. You can remove air spring damper from packaging.

- After installation, first drive the vehicle at high ride height and then at normal ride height. Repeat this sequence once more.

By moving the vehicle lever heights twice, the majority of the gas is exchanged with filtered air from the air supply motor.

- Install air spring shock absorber => [ Installing ] Front Suspension.