Larry Bible faxed me some diagnostic info that was very helpful in fixing the climate control issues with my 1977 300D. It covers both early systems, up to 1980, and later systems, from 1981. In the sprit of passing on the good work of Larry, shoot me your fax number and I'll fax it to you. I have it in the office today and am faxing it to someone else, so you can have it by this PM

JCD