AC fixed works OK for 134a! KLIMA / ACC CONTROLS
 

Thought I had a KLIMA problem, found klima relay 001 545 74 05? matched my 85 300sd - came from 300d $2, NOT the problem. Glad I found a extra for cheap though. AC was on all the time, noticed when I moved temp knob fan kicked in high. Took out ACC unit resoldered about 10 bad looking joints AND took apart temp knob/switch definitely needed a good cleaning. If you do take apart be carefull there's a ball bearing and spring for the knob/switch. Works OK for Florida it's like 90 today.:)