AC Leak...Line or Compressor? 04 CLK500
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Newbie
Joined: Nov 2018
Posts: 14
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2004 CLK500
AC Leak...Line or Compressor? 04 CLK500
I have some kind of leak that's preventing my AC from blowing cold. It blows just fine, but only ambient air. It suddenly stopped blowing cold so I purchased a recharge kit to try that out. After charging the system, I turned on the car let the engine run with AC on coldest setting at full blast. It didn't get any colder so I turned the car off. After turning the car off, I immediately heard a hissing sound coming from the the area near where the compressor sits.
I want to know if this sounds more like a cracked or damaged AC line or something wrong with the compressor. I can see some florescent green liquid that puddled on the under tray. From what I gather, this is the AC refrigerant. Being that I hear a hissing, I'm hoping it's something more simple like a cracked line rather than a compressor that needs to be replaced. Any help or insight would be greatly appreciated!
I want to know if this sounds more like a cracked or damaged AC line or something wrong with the compressor. I can see some florescent green liquid that puddled on the under tray. From what I gather, this is the AC refrigerant. Being that I hear a hissing, I'm hoping it's something more simple like a cracked line rather than a compressor that needs to be replaced. Any help or insight would be greatly appreciated!
Super Member
Joined: Oct 2015
Posts: 784
Likes: 29
From: NYC
2004 CLK 500
I had the same issue turned out to be the o rings on the line going to the compressor . You can test this by going to your mechanic and put it on a machine or buying the dye kit that lets you see where the leak is coming from . I would check the O rings . Whatever it turns out to be you still need a shop to draw out the old refrigerant and air in the line before refilling it .
Junior Member
Joined: May 2008
Posts: 53
Likes: 6
From: New York
2007 clk550, 2006 clk500 (sold)
Find a Mercedes indie to check the vehicle. I had 2 AC issues with 2 different vehicles. 07 clk550 had A/C o-rings replaced in 2011 under warranty .
I had a SAAB with a bad AC. I took car to shop specializing in European cars, but they misdiagnosed the leak. They changed schrader valves, o-rings, some piping, and eventually said I needed replacement condenser. Luckily for me the shop required 4 days to get the condenser. While waiting I ck'd saab board & found a nearby SAAB indie. He put car up on the lift & tore away the AC tubing insulation which revealed a leaky connection. $200 fix & all was well. Good luck
I had a SAAB with a bad AC. I took car to shop specializing in European cars, but they misdiagnosed the leak. They changed schrader valves, o-rings, some piping, and eventually said I needed replacement condenser. Luckily for me the shop required 4 days to get the condenser. While waiting I ck'd saab board & found a nearby SAAB indie. He put car up on the lift & tore away the AC tubing insulation which revealed a leaky connection. $200 fix & all was well. Good luck
Junior Member
Joined: Jan 2020
Posts: 18
Likes: 2
2012 cls 550
Update
Today i took it to another shop that diagnosed my problem as a clogged ac condenser.
he told me that i have to buy a new one and then have the new compressor checked and put new oil in it and the check the system lines.
what i am sure of is that i have no leaks in my system and my original ac coil is stuck in closed position
i will keep you updated
he told me that i have to buy a new one and then have the new compressor checked and put new oil in it and the check the system lines.
what i am sure of is that i have no leaks in my system and my original ac coil is stuck in closed position
i will keep you updated
