Hey guys, just bought my first 560SEL. It has been converted in the past to r134a, but is currently blowing warm air, and that is no good since it's getting warmer in Phoenix and it's only going to get worse. Silver lining is that the previous owner replaced all of the vacuum pods in the HVAC system. I have a $1,000 to spend on either recharging the system with r134a, or converting it back to r12. I am inclined to go back to r12 since this system is designed for it, but not sure how expensive that would get. I just don't want to regret it mid-summer if it's not good enough with r134a in 115 degree heat. Any thoughts on this, or anyone know of someone in the Phoenix area familiar with re-converting r12 systems? Thanks - Mike