Originally Posted by onehundred80

I think you have mixed up what you were told, there must be thousands of signals to open the doors, that is what security is.
My replacement for my old and tacky OEM fob has a Mercedes logo on it, it also has the original key, original transmitter and original chip inside it.
I think I read somewhere that Chrysler wanted a different fob signal range than the Mercedes or more than likely Mercedes dictated a different code range for the Crossfire. The chip programming is a tale all on its own on which a book could be written.