I had the air conditioning filled about 1 month ago because the cooling capacity has decreased. last week I would have wanted to turn on with this sour heat and she did not cool down. it all worked as usual, lamper lights, fans run away, gas inflow noise is there, but she does not cool. then I looked at the compressor. since I saw that the compressor does not run away, so it only runs in empty run. then I have something with the plus cable to the ko mpressor played (event.wackelkontakt), but was not like that!! at some point but how I wanted to measure everything again I see that he ran away. I was happy that all works but unfortunately no cooling power available again. I asked the contract workshop where I had them filled up, they told me that everything worked wonderful after they filled up, it was only 10 gram missing, so almost nothing!!! you have an idea what was wrong could be running?? does not open or close any valve?? or is it an elect. control problem?? have no climatetronic if there is already in the Audi 80. please ask for your help!!! mfg