PeachParts Mercedes-Benz Forum - View Single Post - How do I know what refrigerant is in my system?

JHZR2 · #9 06-30-2009, 12:41 PM

I have real doubts that it was retrofitted with 134a. Perhaps the pressure was "boosted" a bit with 134a, but that would be IMO, it. The PO told me that he had to "top up" the AC system so it blew cold, but that was it.

Thing is, my gauges are r12 and 134a capable. I would never do it, but if I was being lazy, I would potentially attach to a r12 bottle, and be too lazy to remove the 134a connection, so just screw on an "adapter". Poor practice, for sure, but my hope is that it was a bout of laziness...

r12 oil + r134a = acid formation, right?

Ill try to get this sniffed ASAP, to mitigate potential issues, and potentially open/flush and refill the system.

Nothing was opened, the car is like new (72k miles), all original.

Out of curiosity, any ideas of the cost to recover R12, flush, replace R/D, and refill with R12?

Thanks!