Poor AC Performance Due to Refrigerant Loss on Mercedes-Benz S320

A refrigerant leak may develop from one or more of the following AC components: AC compressor, hose manifold for the compressor, or the evaporator core. The loss of refrigerant can cause poor AC performance. Our technicians tell us that proper leak diagnoses should be performed in order to determine the cause of any refrigerant loss.

RepairPal Verified
Average mileage: 67,000 (67,000–67,000)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
9 people reported this problem
2 people shared problem details
1997 MB S320 67000 miles. Leak at a/c evaporator core, Used sniffer detected leak inside cabin coming from vents. Also used die to find leak, using black light residue of die visible underneath the car drain by transmission area. Vacuum a/c system, been loosing approx 2" per minute,no good news here. Since local mechanic price to replace A/c evaporator core is $3900 dealer almost $5000 looks like challenging job in front of me. I'm in the process of gathering materials and researching how to DIY
The air conditioner stopped working twice. Once due to compressor failure and other time years later was defective evaporative core. They were the most expensive repairs to date.
Related Items:
A cracked or broken heater core outlet housing can cause a coolant leak near the bulkhead (fire...
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inope...
where is the AC Blower Motor Resistor located on the 1999 S320 Mercedes benz
Internal and External engine oil & coolant leaks can develop from the head gasket and/or ti...
I have a small coolant leak coming from the back of the head.

Related Content