Date registered: Dec 2005
Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6.7l
Location: Vegas MAN, Vegas
Mentioned: 10 Post(s)
Quoted: 1291 Post(s)
One more thing you can do is with radio installed drive to the dealer and present them registration with your name on it. They might give you a code based on VIN, but if that doesn't work they will pull the radio and read the serial number.
That happened on older model I bought used and the service adviser did it for free.