Have a '87 300SDL. The climate control, fan, recirculating switch all dead. Factory radio / tape and antenna also dead. Have checked / replaced all fuses including 30A strip fuse. Unfortunately don't have a diagram. Car is unmolested and has been in the family since new. Have just about had it. Searched the archives - no help. Any ideas of what to check? If anyone have the diagram, please email to mpuman@mailcity.com