Scheme 64
Brief description of components
xDrive consists of the following components
Emergency Operation
Driving dynamic control and the ADB-X function are not possible in emergency operation.
The transfer case control unit has an integral regulator for emergency control. The regulator provides redundancy for controlling the multi-plate clutch in the DSC control units.
The regulator is used to attempt to maintain all-wheel drive for as long as possible when the DSC control unit malfunctions or important sensor signals drop out.
Substitute values are calculated when individual sensor signals drop out. Functions are operated by using the substitute values until it is no longer possible to control the all-wheel drive effectively.
E83, E53 - xDrive, General Information For Service Staff
The following general information is provided for service staff
- Towing cars with xDrive
- Using brake test stands