r134a

I've got a c270 and the air con doesn't seem too good at the moment is it R134A in there if so I have some at work I can use, anyone no?

Been thinking about getting my air con checked / gassed but apparantly the old R12 gas stopped production in 93' and is illegal for garages to use but im not sure about that. Is it possible to use subsitute gas or does this require an expensive system change, if change which bits are we...

I posted earlier about aircon troubleshooting, but thought I ought to start a new thread on this question... Can anyone suggest or recommend a specialist to convert the aircon system of my 1990 560SEC from its original R12 to run on R134a? I have to bite the bullet and do this, as my system is...