I have an iPhone, so I have to use the PCMCIA slot to load contacts. If I update my contacts, it makes duplicate copies of the old. Is there a way to delete all of your contacts at once? Deleting one by one is a major pain.
The C Class has an option to delete the phonebook without resetting the whole system. It's called "Delete External Data" and kind of sounds like you're going to lose everything but really you only lose the phonebook, which is what you want.
Does the GLK not have that option in the Bluetooth menu?