See also:

Rejecting or ending a call
Press the button on the steering wheel. If you are not in the Tel menu, you can still reject or end a call. ...

Correct use of the seat belts
WARNING USE SEAT BELTS PROPERLY Seat belts can only work when used properly. Never wear seat belts in any other way than as described in this section, as that could result in serious i ...

Seating & Cargo
The GL550's front seats have a litany of power adjustments, including adjustable stiffness for the side bolsters. Even with the bolsters and lumbar support dialed all the way back, the seats are t ...