See also:

The concept
The iDrive combines the functions of a multitude of switches. Thus, these functions can be operated from a central location. ...

Functional requirements
▷ There are no external sources of interference nearby. ▷ To lock the vehicle, the remote control must be located outside of the vehicle. ▷ The next unlocking and locking cycle ...

Volume of spoken instructions
Turn the volume button while giving an instruction until the desired volume is set. The setting is stored for the remote control currently in use. ...