See also:

Rejecting or ending a call
► Press the button on the steering wheel. If you are not in the Telephone menu, you can still accept a call. ...

Switching to navigation mode
Press the function button once or twice. or Select Navi in the main function bar by sliding and turning the COMAND controller and press to confirm. In both cases, you will see ...

Cabin Quality
If the cockpit in a Cadillac Escalade or Infiniti QX56 feels like a roomy lounge, the GL550's cabin is eminently more carlike. Don't expect massive armrests and a tall dashboard — rather, the wrap ...