Multi-Function Steering Wheel
The multi-function steering wheel of the E46 corresponds to the MFL introduced on the E38 and carried over to the E39. The wheel contains two key pads on the left and right side of the air bag that allow activation and control of various driver convince systems.
As with previous MFLs, the left side key pad contains controls for the sound system and telephone. The right side key pad contains the controls for the cruise control.
The K-Bus is used for data communication between the sound system/telephone controls.
The cruise control has its own data link to the engine control module (DME) for cruise control operation.