dc..... not quite right.
If you do not have the 6NF option you CANNOT have the CRADLE INSTALLED...
As long as you have the 6FL you can still connect ot the car for charging and for music from the iPhone
If you have a iPhone 3GS you MUST have the 812 (last 4 digits of thepart number) or newer Y cable. This will allow charging even thought the error message appears on the iPhone display.
M3 GTR - 1/5 scale - 4.2 HP w/ Collari hydraulic brakes - would you believe ~80 MPH on straightaway !!