Multi-Function Steering Wheel (MFL)

MULTI-FUNCTION STEERING WHEEL (MFL)







The multi-function steering wheel is a new feature introduced with the E38. The MFL is connected to the I-Bus via a separate control module and becomes part of the Driver control for the information system.

The steering wheel now 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.

The MFL-CM is located below the left side of the steering column behind the knee bolster

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

The signals for the control of telephone and audio system operation are passed over the I-Bus. The signal for recirculation activation passes over the I-Bus to the IKE. From there it is passed to the IHKA control module over the K-Bus. The signals for cruise control operation are passed to the cruise control module through a separate data link from the MFL-CM.

The operation of each system affected by the MFL is discussed in each respective section of the E38 handouts. The MFL-CM contains a fault memory that monitors the steering wheel control switches. Diagnosis is carried out with the DIS Tester.