I bought the conversion connnectors for my W201 and and while I have little info on AC systems, I watched a good how too vid. I am going to vac out whatever is left in the system, it is holding some pressure, and then put it on a vac and see if it holds. If it does, going to reintroduce 134. Any reason why the old compressor can or cannot operate on the new juice?

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1981 300TD
2005 C55
2004 E500
1999 ML430
1992 400E
1998 C43
2001 SL500
1988 300SEL
1986 190E 16V
1991 190E 2.6