Thanks Cusser.I had it into kwikfit recently who evacuated the system then said they couldn't regas it as it had a leak.I bought an STP EzChill and it was going well and was in the green zone when suddenly the pressure went to zero however a few minutes later it went back suddenly but would not stay...

Hello from Scotland. The aircon on my 1993 Mercedes Benz SL 500 is giving me a fault code 73 "A/C Compressor signal open circuit". The aircon does not blow cold. I know I can go through a Mercedes Benz test routine to see whats wrong but wondered if anyone has come across this before? Many...