See also:

Running a function
Press the button. The function will run immediately. This means, for example, that the number is dialed when a phone number is selected. ...

Deactivating HDC
Press the button again; the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...

TeleService Battery Guard
TeleService Battery Guard continually checks the battery charge level of the vehicle. If the battery charge level falls below a certain value, a notification is automatically sent to your service ...