My '86 560 SEL has the stock AC system with R12. I have always recharged the system every 5 years or so and always with R12. Today when I went to my indie MB shop that I have been using for many years they told me they were going to use R134 for the recharge. I asked how was that possible as everything I have ever read about AC systems says you cannot charge with R134 without making many modifications. The shop owner assured me that R134 would not hurt my AC system. I told him if there was a problem adding R134 to the system he was going to have to fix it. He said he would fix any problems and again assured me that everything would be OK.

Comments please.

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1986 560 SEL (159K miles)