what wrong with my air condition on 1995 Mercedes-Benz S420

it wont blow cool air all the time it will blow then quit what the problum

Asked by for the 1995 Mercedes-Benz S420
If it works sometimes and then quits it can be two issues. One is the coolant is low and you need to recharge it. Or the A/C clutch could be failing and need replaced. Low coolant will cause the compressor to kick out.