See also:

Overview: changing bulbs/bulb types
You can change the following bulbs. The bulb type can be found in the legend. Halogen headlamps 1 Low-beam headlamp: H7 55 W 2 High-beam headlamp: H7 55 W 3 Parking lamp/standing lamp: W 5 W 4 ...

Vehicle data, GL 550
The data stated here refers specifically to a vehicle with standard equipment. Consult an authorized Mercedes-Benz Center for the data for all vehicle variants and trim levels. ...

General notes
You can store music files in MP3 or WMA format in the MUSIC REGISTER. The memory has a capacity of approximately 7 GB. Retain the original music files in a secure location. An error in COMAND ...