(I tried asking the question on a Mercedes forum but got zero replies)
Hi all, The air-conditioning in my car (1992 Mercedes S420 W140) still works but it's not as cold as it used to be. Not bad considering I've owned the car for well over 5 years! I'm planning on getting it serviced soon but a friend of mine suggested using a "Hydrocarbon refrigerant gas" instead of the standard R134a. I live in Australia and we can't buy R134a without a refrigeration licence so my only option is to go to a licenced service tech... But I'd prefer to DIY and I can buy and use "HyChill Minus 30" Hydrocarbon refrigerant gas in Australia legally.
All I need is a a gauge set and vacuum pump. (I'd get the R134a extracted by a local garage)
Has anyone done this and how did it work out?
See here for more info on the gas I plan to use...
https://hychill.com.au/products/minus-30
This is the label affixed to my car.
http://forums.pelicanparts.com/off-topic-discussions/955503-w140-daily.html