A/C Not Working all of Sudden
Thread Starter
Super Member
Joined: May 2008
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15' W222
A/C Not Working all of Sudden
Jumped in the car today (2015 S550, 53k miles), as normal and noticed shortly thereafter there was no cold air blowing. Turned it on/off, played with controls, Auto, high, low etc, nothing seemed to make a difference. The A/C on is checked and stays checked but no cold air. Dealership can't get me in until middle of next week! I'm literally in the hottest part of the U.S. and though I don't drive it much, having no a/c means I cannot drive.
I searched through threads and there seems to be issues with pinhole sized punctures in the a/c parts, but nothing else. Has anyone had any similar issues?
I searched through threads and there seems to be issues with pinhole sized punctures in the a/c parts, but nothing else. Has anyone had any similar issues?
MBWorld Fanatic!
Joined: Aug 2017
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2019 S560, 2015 Honda Civic Hybrid
Sorry to hear, we're getting incinerated here in Texas and can definitely relate to the problem.
Our system has the same fundamental elements as every car ... a refrigerant charge that's compressed, cooled and then expanded to chill a heat exchanger under the dash. Then, in addition to those basic processes we have electronic controls that are specific to our Mercedes.
If you want to get a leg up on the repair process, you could take the car to any qualified A/C repair shop and ask them to check the refrigerant charge and pressures using gauges that attach to the high and low pressure ports of the system. That would give you a good idea if there are any leaks that might have caused loss of refrigerant and pressure in the system. If you have lost refrigerant, the shop can use a dye and other methods to try to locate where the leak(s) is coming from.
These are the same first steps your dealer would do but if you want to know sooner, this would give you a good starting point.
Our system has the same fundamental elements as every car ... a refrigerant charge that's compressed, cooled and then expanded to chill a heat exchanger under the dash. Then, in addition to those basic processes we have electronic controls that are specific to our Mercedes.
If you want to get a leg up on the repair process, you could take the car to any qualified A/C repair shop and ask them to check the refrigerant charge and pressures using gauges that attach to the high and low pressure ports of the system. That would give you a good idea if there are any leaks that might have caused loss of refrigerant and pressure in the system. If you have lost refrigerant, the shop can use a dye and other methods to try to locate where the leak(s) is coming from.
These are the same first steps your dealer would do but if you want to know sooner, this would give you a good starting point.
Thread Starter
Super Member
Joined: May 2008
Posts: 646
Likes: 16
15' W222
Thx Tom.
I ended up taking it into another dealership that could fit me in so I wouldn't have to wait till Wednesday. Turned out to be the A/C compressor [insert crying emoji], total cost parts/labor is roughly 2745.00. I'm sure my Indy mechanic could get it done cheaper, but I just had them go ahead and fix it so I can have a loaner for the next few days. Funny, I got the dealership email shortly before getting notified that I got a 15% raise at my job so things always have a way of working themselves out.
I ended up taking it into another dealership that could fit me in so I wouldn't have to wait till Wednesday. Turned out to be the A/C compressor [insert crying emoji], total cost parts/labor is roughly 2745.00. I'm sure my Indy mechanic could get it done cheaper, but I just had them go ahead and fix it so I can have a loaner for the next few days. Funny, I got the dealership email shortly before getting notified that I got a 15% raise at my job so things always have a way of working themselves out.
