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Eric
Eric, Automotive Repair Shop Manager
Category: Mercedes
Satisfied Customers: 29956
Experience:  20+ yrs. experience as repair shop manager and technician.
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No cold air; had Freon refilled and system doesn't seem to

Customer Question

No cold air; had Freon refilled and system doesn't seem to hold the refrigerant.
JA: Do the vents feel cold? Is there a coolant leak?
Customer: No cold air from vents, when Freon was added, no leaks presented.
JA: What is the model/year of your Mercedes?
Customer: 2001 ML 430
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I took vehicle to Jiffy Lube, where they tried unsuccessfully to add Freon; their unit stated that the pressure wasn't holding
JA: Anything else you think the mechanic should know?
Customer: They suggested that I take it to a mechanic to look for leaks.
Submitted: 3 months ago.
Category: Mercedes
Expert:  Eric replied 3 months ago.

HI,

Ok, there are many places it can leak from - compressor seals at front or rear of it, condenser, expansion valve, evaporator, receiver/drier, high pressure or low pressure ac line, high or low pressure service port, or one of the seals at any of the line connections.

There is simply no way to tell you where it is leaking. It REQUIRES hands on testing. The system needs to be filled with refrigerant and florescent dye and then a black light used to trace the dye that will leak out to its source and at that time do the repair.

Cost range will be from $200 or so for a line up to $1200 for the evaporator.

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Expert:  Eric replied 3 months ago.

I noticed we have not yet resolved your concern you asked about. I would sure appreciate it if you would reply so I can offer my skills and knowledge and repair guide access to help as best I can.

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