Hello All,

Recently purchased a 1989 300E. I've had it in a shop to have some work done to it (new radiator, hoses, shift bushings). While there asked mech to diagnose the A/C Unit.

When I picked the car up the mech informed me that the compressor had a little noise coming from it (nothing major), it did not have any leaks.

When I engage the A/C unit, the car doesn't act weird, but it only blows warm air (even in recirc mode).

Could it be as simple as the A/C Unit needing recharging, or should I look for other problem areas first? Also, during original production of this car (Northeast Region) which A/C format was used R12 or R134? I'm not sure which I have.

Thank you in advance for all replies to this thread.