See also:

Restoring the factory settings
Press the and buttons simultaneously for approximately six seconds until the battery check lamp flashes twice. ...

Safety & Reliability
As of this writing, the Insurance Institute for Highway Safety has not yet crash-tested the GL-Class. Eight standard airbags include three-row side curtain airbags and seat-mounted side-impact air ...

Important safety notes
WARNING In order to avoid possible loss of vehicle control, all seat, head restraint, steering wheel and rear view mirror adjustments, as well as fastening of seat belts, must be done before ...