I know it will fit these models for sure...
06 - 08 GL450 , GL500
06 - 08 ML350, ML500
06 - 08 R350, R500
2005 C55 AMG
With other ones, please make sure. . . Call dealers around and ask if its a compatible unit, some don't know and will simply say NO, but call and check with other dealers. . . I'm certain that it will work with other models, but don't know which ones for sure
- Comand navigation unit with GPS
- Sirius support
Here is a pic of the plugs so You can make sure yourself if the plugs match or not. . .