Air Conditioning problem
1995 Mercedes Benz 420sl V8 Two Wheel Drive Automatic 70,000 miles
Upon starting my 1995 S420 Mercedes the air conditioner cools. However if I stop the engine, upon srtarting it again the air conditioner blows hot air.A mechanic has had it for several weeks, and has been unable to find the problem. Also do I owe him anything as the auto has nor been repaired?