See also:

What to do if...
Information on suitable mobile phones. Appointments, tasks, notes, text messages, or e-mails from the mobile phone are not displayed. The mobile phone is not capable of the missing function ...

The concept
The automatic engine start-stop function helps save fuel. The system switches off the engine during a stop, e. g., in a traffic congestion or at traffic lights. The ignition remains switched on. ...

Activating HDC
Press the button; the LED above the button lights up. ...