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 Buttons
The steering wheel buttons control functions and menu selection for:
- Traffic information (option)
- Audio (option)
- Carphone (option)
- Cruise control (option).
The signals from the steering wheel buttons are transmitted via serial communication.
The steering wheel buttons are connected in series to the steering wheel module (SWM) via contact reel in the steering wheel hub. The steering wheel buttons are connected in the following order, counted from the contact reel:
- Cruise control
- Audio /carphone
- Traffic information.
There are diagnostics for the steering wheel buttons.
Use the Manual With the Right Hardware
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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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