Axial Buttons In Turn-Signal/Main-Beam Switch

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

The axial buttons (Check-Control button at top, on-board computer button at bottom) are for the following functions:

Menu of the Check-Control system in the LCD display and clock/date selection
Menu of the on-board computer in the LCD display

The signal generated when one of the axial buttons is pressed is transmitted through the bus system.

The following control units communicate via the PT-CAN or the K-CAN with the control unit of the instrument cluster: