Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
System filling (Allroad): Notes
Vehicle must not be standing on its wheels during filling of the system (if a repair at the spring system was performed before), otherwise the air spring will be damaged!
It is possible to perform filling of the air spring system without having to loosen mechanical connections.
System filling via On Board Diagnostic (OBD) must only be performed with the vehicle standing!
- The air spring system (pressure reservoir, air springs, pressurized air lines) can be filled using the VAG tester. For this, the valid limit values are: Air spring 9 bar /pressure reservoir 13 bar.
- System filling is performed in stages. (air springs, front /air springs, rear / pressure reservoir)
- Filling is only possible after manually switching off the regulation. Switching off and on of the regulation is performed with the VAG tester (Fct. > 10, channel 10) or via manually pressing button for up and down (press button twice > 5 seconds).
- Time frame for filling is limited to 65 seconds. However, it is possible to perform the function several times in sequence to accumulate a longer filling time.
- It is possible to perform a filling procedure in stages using the up and down arrow buttons of the VAG tester.(buttons 1/3 of VAG1551 tester have the additional assignment uparrow - button / downarrow - button)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.