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 Dynamics
VDC and ARS have to respond with the appropriate speed in the event of rapid lane changes, rapid cornering or rapid changes of direction on winding country roads.
The ARS systems on previous model series had a separate control unit with the appropriate output stages for controlling the ARS valve manifold. The system architecture on the F01/F02 now features two different vertical dynamics management (VDM) control units:
- If ARS is not fitted, the VDM has no output stages for ARS valve manifold control
- If ARS is fitted, the VDM has output stages for ARS valve manifold control
The system dynamics of ARS and VDC are determined by the duration of the following stages:
| Process | Time |
|---|---|
| Signal detection by sensors, processing of sensor signals in the control unit, valve control | approximately 10 ms |
| Change of direction, reversal of force direction, directional control valve | approximately 30 ms |
| Pressure increase (force per wheel) 0 -> 30 bar (0 -> 350 N) 0 -> 180 bar (0 -> 2100 N) |
approximately 120 ms approximately 400 ms |
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.