My 1995 E320 coupe has a weird air con problem. I knew it was leaking as the air con worked for a while then when the gas got low it stopped working. So I've cured the leaks by replaced the condenser, dryer and compressor. Now the air will kick in from startup when the cold start sets the tickover higher but as soon as the revs drop to normal the air con stops working. I've used one of Malcolm's blink readers and it show just one blink on Pin 7 which suggest that there is no fault. The battery and fuse box are both new.Any ideas?