I think your best bet is to swap in a manual system from a 240d - I did that on my '80 model coupe and I'm very pleased - goes right in and looks like it belongs there. If the car is your DD you can even keep driving it during the transplant - I drove the coupe a few times for grins with the dash and the console out, the guage cluster held in place (sort of) with a coat hanger, wires everywhere - quite a sight. The job really wasn't too hard I look for D Morrison's writeup with great pics on how to get the a/c evaporator out. By the way, while you're in there, be sure to test the heater coil - my "new" one (from the 240d) leaks a little - would have been so easy to fix when I had it all apart.