Hi Guys, Recently I looked into getting my Air con re - gassed becasue my car is over 3 years old now. Apparently you are supposed to get re - gassed every 2 - 3 years and I noticed my air con was not that cold. I rang my local Audi garage and a few independants and the average was about £65 plus! Then I found this on the Interweb http://www.id-usa.com/product.asp?CID=27&PID=92 They sell these in Halfords for £39 I thought it worth a try so promptly bought one. I returned home and followed the instructions and it was a doddle. On the built in gauge it told me I needed to add gas so I did until the needle went onto the blue mark which meant 'OK'. What a difference it made! Lovely Ice cold air now comes out of the vents instead of cool air. I must have used about 1/5th of the can so it means I have plenty more to use again or do a mates as a favour. If you reckon your air con needs a re gas and you don't want to pay a 'specialist' to do it then these are well worth a try.