| Adaptive cruise control unit -J428- | To avoid warnings being given simultaneously by the lane departure warning system and the braking guard, the lane departure warning system suppresses its steering wheel vibration warning if the braking guard simultaneously activates the brake. |
| Entry and start authorisation control unit -J518- | Transmits information on which ignition key is currently recognised by the vehicle. The lane departure warning control unit utilises this information to assign stored driver settings to the corresponding ignition key. |
| Convenience system central control unit -J393- | Transmits information on whether the left or right turn signal is currently active. |
| Steering column electronics control unit -J527- | Transmits information indicating whether or not the lane departure warning button on the steering column lever is currently activated. Receives information from lane departure warning system on whether or not to activate the driver-alert vibration motor. This information is then sent via a LIN bus message to the multifunction steering wheel, which activates the vibration motor. |
| Front information display and operating unit control unit -J523- | Transmits changes in driver settings relevant to the "lane departure warning" function to the lane departure warning control unit. The new settings are then saved and assigned to the ignition key currently in use. |
| Engine control unit -J623- | Transmits the current engine speed. The lane departure warning system requires this data, because the activation times of the windscreen heater are dependent on whether the engine is presently running or not. (No heating phases are allowed when the engine is off.) |
| Adaptive suspension control unit -J197- | Keeps Audi lane assist informed at all times about the actual height of the dampers on the vehicle. This data is required for electronic correction of the current camera height, as well as the pitch and roll angle of the camera. |
| ABS control unit -J104- | Supplies the vehicle speed signal required for activating or deactivating the lane departure warning, as well as the yaw rate. |
| Control unit in dash panel insert -J285- | Receives information on the current status of the lane departure warning for activating the warning lamp on the dash panel insert (yellow, green or off). Receives information on whether or not to display a text message and, if so, what text message. |
