Here is some info on the C33 http://www.eabjr.com/Business-Radio-C33-and-CD43.php
http://www.bimmerforums.com/forum/sh...-display/page7
http://www.bimmerforums.com/forum/sh...-radio-display
BMW ALPINE C33 DIN RADIO STEREO CASSETTE TAPE E36 318 328 M3 Z3 - REPAIR SERVICE http://www.ebay.de/itm/BMW-ALPINE-C3...-/391232582633