Hello, I'm desperately seeking a 4 digit radio code for my 1990 Mercedes 300TE. I'm getting my husband a XM radio for Christmas and I can't find the card with the code on it any more. I've pulled the radio out of the dash and here are the serial #'s Becker Grand Prix Model # BE 1480 Serial # X9515430 Then there was a bar code at the front with this #: 1480F20X9515430