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.
Functional test
Switch on ignition, check DTC memory, and erase DTC memory if necessary.
See ON BOARD DIAGNOSTIC (OBD) .
System errors are indicated by the yellow check light in the tachometer dial lighting up and staying lit.
Then, check the operation of the system by loading the rear axle (for example by opening the trunk and sitting in it).
After no more than 10 seconds the system should begin raising/pumping up the rear axle to equalize the compression caused by the loading.
Maximum pumping time is 30 seconds
If the distance dimension falls more than 6 mm within 24 h, then the system has a leak and has to be checked.
The level control system monitors how long the compressor is turned on to avoid possible overheating or excessive battery discharge. If no switch-on occurs despite a requirement for it, then you can proceed as follows:
- Wait approx. 6 minutes. If there is an excess temperature, then after this period of time (6 minutes) at the latest a switch-on time of about 15 seconds is possible.
- Starting the engine allows normal switch-on once again, without regard to battery condition.
NO RELATED
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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.