The pushbutton climate control unit in this series of cars is notoriously finicky. They seem to last 10 or 12 years and then quit, so if you dig around through others' posts on this board, you'll see many other people with similar problems. (Actually, that goes for almost all the questions one could come up with for a 300Dt).

There's a company in California that rebuilds these climate control units, as well as the cruise control computers & actuators. Others on these forums have had sucess with them, but I've never dealt with them.

General Development Laboratories

Also, take a look at the Diesel Discussion forum. A large percentage of the regulars on that forum have 123 series 300Ds, 240Ds, and their kin, so any questions pertaining to your engine or virtually anything else about your car will be met with a host of valuable information and insight.

- Nathan
'83 240D "Steiner"
'00 New Beetle TDI