I called the Home
-800.910.1021 and got the procedure to activate the blackberry curve assuming you have the bluetooth module in your Mercedes (I have the M-Class year 2008 not sure if it matters).
1. Press the Mercedes emblem on the bluethooth module
2. The blue light will start to blink (you can release your finger)
2. On the phone: press "search for connections"
3. It will find the MB system
4. Enter code: 62872
5. You are now connected
If the code does not work just call the on the number above
FYI, it transfers the whole phonebook, call history.....GREAT