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.
Steering Wheel Structure: Notes
| Index | Explanation |
|---|---|
| 1 | Steering wheel heating |
| 2 | Button block for cruise control |
| 3 | Airbag unit |
| 4 | Vibration actuator for lane departure warning |
| 5 | Steering wheel electronics system |
| 6 | Button block for telephone/radio |
The button blocks as well as the steering wheel electronics are linked across the LIN bus to the electronics in the steering column switch cluster.
With the corresponding request, the steering wheel electronics control and monitor the function of the vibration actuator and steering wheel heating.
The priming caps of the airbags are connected directly and are activated by the Crash Safety Module, ACSM.
The fanfare-horn button is evaluated by the electronics of the steering column switch cluster.
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.