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General Question

bigdogbitu on Wed June 10, 2009 10:37 AM User is offline

Year: 1989
Make: mercedes
Model: 300e
Refrigerant Type: r-12
Country of Origin: United States

The original r-12 system was recharged by the dealer (not by me) 3 years ago. I noticed the dealer replaced the original valves with a push and click type that appear to be compatible with the 134-a system. Someone told me this was required by law.

Question: Does this mean they converted the system to a 134-a since the valves were changed or could it still be an r-12? I have a 134-a gauge but it still doesn't fit the valve fittings they put on. Confused.....I called the dealer to find out what they did but they haven't returned my call with the information I needed yet.

mk378 on Wed June 10, 2009 10:42 AM User is offline

It might be another R-12 substitute. These are almost never used nowadays but the EPA had approved several substitutes and they all had different incompatible fittings.

It is perfectly legal to keep using R-12 and keep the original stock threaded fittings.

So if the fittings have been changed, it's almost certain that whatever may be in there now is not R-12.

Edited: Wed June 10, 2009 at 10:43 AM by mk378

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