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.
Controlling The Functions Using The Steering Wheel Buttons
Model year 2007
Model year 2008-
Subwoofer module (SUB) (16/79)
HINT: The figure above applies to vehicles built up to and incl. structure week 200745. Vehicles built from and incl. structure week 200746, Integrated Audio Module (IAM) is placed second last, between Remote Digital Audio Receiver (RDAR) and Accessory USB unit (AUU).
The steering wheel buttons connected to the steering wheel module (SWM) (3/130) can be used to control:
- volume control and CD track / radio selection
- menu selection for traffic information
- volume control during a hands free call and menu selection for phone module (PHM) (16/60) and Bluetooth phone module (BPM) (16/147).
The signals from the steering wheel buttons are transmitted to the steering wheel module (SWM) with LIN communication. The steering wheel module (SWM) transmits the signals on to the Infotainment Control Module (ICM) (3/281) using LIN communication. The infotainment control module (ICM) in turn transmits the signals on to the affected control module on the MOST network.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.