Originally Posted by scot1981
is the navigation actually gps based? i was under the impression that is a cd/dvd based system like most mercedes, therefore there is not an antenna, and i think that is just the radio antenna.
Scott,
The system uses the CD/DVD to provide map images and database-related information such as hotels/restaurants. It uses GPS to provide the actual position data. Some systems (I don't know if the D/C system does this or not) also have accelerometers so the system can navigate using dead reckoning when the satellite data is not available.