Becker Radio
 

I recently inherited a '76 300D. The Stereo head is missing from it. I have a Becker unit from my 89 190E that I replaced with a Blaupunkt Unit for better sound quality and because the codes got dumped from the Becker and no-one could find them or knew how to replace them. Will this unit work in the 76? And also, how do I obtain or reset the security codes? :)