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.
Control Unit: Notes
The EHC control unit is located in a module carrier in the rear of the luggage compartment on the right-hand side.
| Index | Explanation |
|---|---|
| 1 | Air supply (LVA) |
| 2 | EHC control module on mounting bracket |
The EHC control unit is fully compatible with diagnostics.
The EHC control unit receives the following signals:
- Vehicle ride height
- Load cutout signals
- Terminal 15 ON/OFF
- Vehicle speed
- Lateral acceleration
- "Engine running" signal
- Hatch status.
The EHC control unit decides on a case-by case basis whether a control operation is required in order to compensate for changes in load.
It is thus possible to optimally adapt the frequency, specified heights, tolerance thresholds and battery load to the relevant situation by means of the control operation.
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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.