Operation CHARM: Car repair manuals for everyone.

General Information




Multi-Function Steering Wheel (MFL)
The MFL is a system that allows the driver to make various switching requests without having to look away from the road or remove a hand from the steering wheel.

The steering wheel incorporates the control switches for:




The switches are arranged on the left and right side of the Airbag pad. Both of the switch panels are micro processors that take the input request and produce digital signals that are sent to the Multi-Function Steering Wheel Control Module.

As introduced up to 9/96 the MFL-CM is located below the left side of the steering column behind the knee bolster.

After 9/96 the MFL-CM was deleted and the electronics were incorporated into the right button pad.

The input signals from the control switches are processed in the MFL and sent to the respective control modules for system operation.

The signals for the control of telephone, audio system and re-circulation operation are passed over the I/K-Bus. The signals for cruise control operation are passed to the cruise control module or DME through a separate data link from the MFL.

The MFL-CM contains a fault memory that monitors the steering wheel control switches. Diagnosis is carried out with the DIS/MoDiC.