Thanks Hit Man X and Cleeve for your comment. I vaguely remember there was a radio code stamped on a metal ID tag in the User Manual package. I guess this is not true. Last time after replacing the car battery, I couldn't find this tag and I just had the dealer re-enabled the radio (for $20).

Does this mean my only options are to take the car to the dealer or ship the radio to have it re-enabled? This time the radio doesn't even power on, does this mean the internal battery needs to be replaced in addition? Please advise how much this might cost. By the way the cassette player hasn't worked for quite a while.

Thanks again,

Alf