PeachParts Mercedes-Benz Forum - View Single Post - How do I tell if my A/C runs R-12 or R-134a?

engatwork · #3 05-05-2011, 07:19 PM

Here we go, that time of year.
If it has been converted it will have fittings for r-134a. You need to look at the "inner" section of the compressor pulley to see if it is turning when the engine is running and the center button is pressed on the climate control unit and the dial is in the coldest position.