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.
Consumer shutoff
Consumers are switched off according to different criteria and are split into the following categories:
- Convenience consumers
- Heated rear window
- Seat heating
- Steering wheel heating
The convenience consumers are automatically switched off when the engine is switched off. The convenience consumers can only be switched on again after the engine has been restarted.
- Legally prescribed auxiliary consumers
- Parking lights
- Hazard warning lights
Legally prescribed auxiliary consumers must still be operational when the engine has been switched off, as long as this is possible. These auxiliary consumers are not deactivated, even if the battery's limit of starting capability has been reached.
- Auxiliary consumers
- independent heating
- Independent ventilation
- Communications components
- Displays
- Terminal 30g
- Telematic services
The auxiliary consumers listed can still be switched on after the engine has been switched off. The auxiliary consumers are automatically switched off when the battery reaches its limit of starting capability. A CAN message from the DME / DDE prompts the shutdown.
- System-related run-on
- Electric radiator fan
System-related run-on components can remain operational for a certain time after the engine has been switched off.
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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.
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