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.
Input/output Diagram, Steering Column Switch Cluster
| Index | Explanation |
|---|---|
| 1 | Steering column stalk for turn-indicator/high-beam switch |
| 2 | Steering column switch cluster (SZL) |
| 3 | Steering column stalk wiper switch |
| 4 | Footwell module (FRM) 12 Control unit (KAFAS) |
| 5 | Central gateway module (ZGM) |
| FlexRay | FlexRay |
| 6 | Junction box electronics (JB) |
| 7 | Instrument cluster (KOMBI) |
| 8 | Multifunction steering wheel |
| 9 | Coil-spring assembly |
| 10 | Steering wheel heating/steering wheel adjustment buttons |
| 11 | Crash Safety Module (ACSM) |
| LIN-Bus | Local Interconnect Network bus |
| LWS | Steering-angle sensor |
The signals which are triggered by the turn-indicator/high-beam switch steering column stalk (1) or wiper switch (3) are made available to the footwell module (4) or the junction box electronics (6).
The button signals at the multifunction steering wheel (8) are directed through the coil-spring assembly (9) to the steering column switch cluster (2), where they are evaluated and then transmitted across the FlexRay.
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.