Hi all,

I bought a 95 e320 in mint condition last week. Clean carfax, no accidents, and 170,000 miles. Doorlock, windows, radio, all electricals are working except a few minor items and the a/c.

A little history on it:

previous owner states she replaced the compressor last year. A/C worked for a few months, then she garaged the car for the summer, and the a/c stopped working when she started driving again in october.

When I got the car, the compressor would work for 1~3 minutes in the morning. Then the fan would just blow regular air.

I took it to a garage that does a/c service and had them charge the freon. They verified that the vacuum is still good and that there were no leaks (pressure was good, they said).

The charge did not help. Still blowing regular air.

So i took it to another place, an auto shop that specilizes in electric and a/c. These folks traced the problem to a compressor relay that was not turning on the compressor. So i had the part replaced.

The a/c worked for 3 minutes. Then it stopped again.

After 3 hours of troubleshooting, it's getting dark. So the a/c specialist gave up and asked me to come back tomorrow.

They ended up not charging me the $140 they wanted to troubleshoot and fix the problem.

So i was driving the car back, and i turn on the radio. The radio display works, but no sound came out. And the minute I turn on the radio, the buckle-up sign came on instantly, along with the interior lighting next to the buckle-up sign.

The radio eventually came back on and the buckle-up sign went away. But that really gave me a scare.

The other funny thing was, the driver side window's 1-touch open function failed as well. But resumed working after a few repeated tries.

Any ideas?

I've so far had the compressor replaced, charged the freon, and replaced the compressor relay. The mechanic told me they've confirmed the thermostate working, along with a few other a/c parts that they confirmed weren't the issue.

I'm a bit weary about bringing the car back to this auto electric place and thinking maybe i should just bite the bullet and send it to the dealership to have it looked at.

Any suggestions are most welcome!!

Theo

 

Check to make sure the belt is tight, a slipping belt will shutoff the compressor from working , its comman for belt tensioner to fail , you may not know it, the compressor has a speed sensor , if ibelt slips ac gets shut off

 

check all the fuses. some do weird things when the go. (Like the radio will not shut off with the key)

Horace

 

Hello

I have the same problem about AC (cold air for 1 min and after that, warm one until i restart the engine or remove the AC fuse and put it again).
I have replaced the Climate Control Unit but it stills doing the same, also charged the frenon....nothing happens.

Have you fixed it? any new ideas?
Mine is a w202 c220 cdi 1998

Thank you
Redouan

 

Hi, I took it to a local benz shop and they replaced the klima switch and all's well again.

Not sure what else they've done, but they mentioned that the a/c freon was overcharged a bit so they tweaked it a little.

Anyway, it's been working great so far. Knock on wood!!

 

Thank you for your reply

This week i'm going to take it too to a MB shop, because i tried by myself but nothing worked.
Hope yours will still working great for lot of years

Thank you again
Redouan

 

Am having trouble with my ac. The driver side ac does not put out cold air while the passenger side is cold. Does anyone know what could be the issue there. I have had the system charged and it helped for a little while but even still the driver's side was never real cold.

 

Blind shot, but could there be a leak in the supply for the driver's side vents? I think they can test that with a fluorescent agent and a blacklight.

 

Check the vacuum actuators on the HVAC unit inside the dash. I believe there are separate actuators for left and right and it sounds like one of them is not moving the correct damper to route the cold air to the driver's vent.