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 Overview: Notes
| Index | Explanation | ||
|---|---|---|---|
| 1 | Front wiper motor with wiper | ||
| 2 | Outside temperature sensor | ||
| 3 | Heated washer jet 3x (1) | ||
| 4 | Headlight washer system motor | ||
| 5 | Washer fluid pump motor | ||
| 6 | Washer fluid level sensor | ||
| 7 | Wiper switch on the steering column stalk | ||
| 8 | Rain/lights/solar/condensation sensor | ||
| 9 | Lights operating unit | ||
| 10 | Dynamic stability control | ||
| LIN-Bus | Local Interconnect Network bus | ||
| JB | Junction box electronics | ||
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When the wiper switch on the steering column stalk (7) is operated, the wiper motor (1) is switched on or off. The junction box electronics execute the functions of the wiper/washer system. The motor for the washer fluid pump (5) or for the headlight cleaning system (4) is switched on or off by the junction box electronics.
On vehicles with automatic driving lights control, the junction box electronics receive the information about switching the wiper/washer system on/off from the rain/lights/solar/condensation sensor (8).
The Dynamic Stability Control (10) provides information about the vehicle speed.
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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.