I have an S213 E220d 4matic. The aircon has stopped working, so I took it to the dealer for attention. It was pressure tested and regassed, which lasted for all off a wheel. Was regassed again and again it only lasted for a week. On the third attempt, the dealer advised there was a leak, and would need a new compressor. This was one of a few cars that used the co2 gas R744 and the quote for replacing the compressor is£4200!! I am in Glasgow and am unable to find anyone else who deals with this gas. I am looking to see if anyone has an R744 system that has had issues, and recommendations of any non-Mercedes garages that can fix this at a reasonable price. I am in Glasgow but will travel! TIA