Been noticing the AC in the car has been getting less cool. Driver side warmer.
Thread Starter
Member
Joined: Aug 2014
Posts: 88
Likes: 8
2011 GL450 VIN: 4JGBF7BE8BA706134
Been noticing the AC in the car has been getting less cool. Driver side warmer.
So in the past 2-3 weeks we have been noticing our GL 450 (2011) has been pushing out less cool air. About a week ago, I stopped by autozone just to grab a can of AC-Pro with a gauge.
Connected the gauge just to see where things were. Followed the instructions, and noticed the gauge was showing it was at the top of the "full" (green) level. I thought that was strange. I didn't feel comfortable putting anything in to a pressurized system if it was full, so I didn't.
At the time of doing this, I didn't realize the driver side air was a different temperature than the passenger side, I only realized that tonight. I went through about 15 minutes of testing at various temperatures and determined the longer / harder the fan blew at lower temps the driver side simply lost it's coolness, while the passenger side still remained fairly cool. I don't know if it was at it's coldest level, since it was in the high 70s this evening where I live, but it was significantly colder than the driver side.
I called a local indy place that works on mercedes and they suggested for $250 they could check it out, determine if it's a temperature sensor issue, check the pressures, extract the frion, add new, and add a dye so that it can be checked at a later date in case the leak is small or large.
Before jumping on that, I want to make sure there isn't a simple test or check I can do myself that might be an easier / cheaper solution.
I had read in another forum but for a different make of mercedes about accessing the diagnosis panel via REST, etc.. but I couldn't find something similar with the x164. Following the same steps with this vehicle did not give me any kind of diagnosis panel.
Anyways, thoughts?
Connected the gauge just to see where things were. Followed the instructions, and noticed the gauge was showing it was at the top of the "full" (green) level. I thought that was strange. I didn't feel comfortable putting anything in to a pressurized system if it was full, so I didn't.
At the time of doing this, I didn't realize the driver side air was a different temperature than the passenger side, I only realized that tonight. I went through about 15 minutes of testing at various temperatures and determined the longer / harder the fan blew at lower temps the driver side simply lost it's coolness, while the passenger side still remained fairly cool. I don't know if it was at it's coldest level, since it was in the high 70s this evening where I live, but it was significantly colder than the driver side.
I called a local indy place that works on mercedes and they suggested for $250 they could check it out, determine if it's a temperature sensor issue, check the pressures, extract the frion, add new, and add a dye so that it can be checked at a later date in case the leak is small or large.
Before jumping on that, I want to make sure there isn't a simple test or check I can do myself that might be an easier / cheaper solution.
I had read in another forum but for a different make of mercedes about accessing the diagnosis panel via REST, etc.. but I couldn't find something similar with the x164. Following the same steps with this vehicle did not give me any kind of diagnosis panel.
Anyways, thoughts?
Member
Joined: Dec 2018
Posts: 247
Likes: 59
From: Lawrence, Kansas
GL320
AC work is sort of a dark art. Especially when you have variable displacement compressors. Those "AC in a can w/guage" aren't anything i would consider reliable or advisable. Most new vehicle AC systems run on a +/- overfill underfill of 1-2oz margin of error so you're wasting your time. You need someone to hook up guages and analyze the pressures for the current ambient temperature.
Junior Member
Joined: Dec 2018
Posts: 63
Likes: 20
GL 550
So in the past 2-3 weeks we have been noticing our GL 450 (2011) has been pushing out less cool air. About a week ago, I stopped by autozone just to grab a can of AC-Pro with a gauge.
Connected the gauge just to see where things were. Followed the instructions, and noticed the gauge was showing it was at the top of the "full" (green) level. I thought that was strange. I didn't feel comfortable putting anything in to a pressurized system if it was full, so I didn't.
At the time of doing this, I didn't realize the driver side air was a different temperature than the passenger side, I only realized that tonight. I went through about 15 minutes of testing at various temperatures and determined the longer / harder the fan blew at lower temps the driver side simply lost it's coolness, while the passenger side still remained fairly cool. I don't know if it was at it's coldest level, since it was in the high 70s this evening where I live, but it was significantly colder than the driver side.
I called a local indy place that works on mercedes and they suggested for $250 they could check it out, determine if it's a temperature sensor issue, check the pressures, extract the frion, add new, and add a dye so that it can be checked at a later date in case the leak is small or large.
Before jumping on that, I want to make sure there isn't a simple test or check I can do myself that might be an easier / cheaper solution.
I had read in another forum but for a different make of mercedes about accessing the diagnosis panel via REST, etc.. but I couldn't find something similar with the x164. Following the same steps with this vehicle did not give me any kind of diagnosis panel.
Anyways, thoughts?
Connected the gauge just to see where things were. Followed the instructions, and noticed the gauge was showing it was at the top of the "full" (green) level. I thought that was strange. I didn't feel comfortable putting anything in to a pressurized system if it was full, so I didn't.
At the time of doing this, I didn't realize the driver side air was a different temperature than the passenger side, I only realized that tonight. I went through about 15 minutes of testing at various temperatures and determined the longer / harder the fan blew at lower temps the driver side simply lost it's coolness, while the passenger side still remained fairly cool. I don't know if it was at it's coldest level, since it was in the high 70s this evening where I live, but it was significantly colder than the driver side.
I called a local indy place that works on mercedes and they suggested for $250 they could check it out, determine if it's a temperature sensor issue, check the pressures, extract the frion, add new, and add a dye so that it can be checked at a later date in case the leak is small or large.
Before jumping on that, I want to make sure there isn't a simple test or check I can do myself that might be an easier / cheaper solution.
I had read in another forum but for a different make of mercedes about accessing the diagnosis panel via REST, etc.. but I couldn't find something similar with the x164. Following the same steps with this vehicle did not give me any kind of diagnosis panel.
Anyways, thoughts?
Thread Starter
Member
Joined: Aug 2014
Posts: 88
Likes: 8
2011 GL450 VIN: 4JGBF7BE8BA706134
why would a weak compressor send cold air down 1 pair of vents and not another pair?
Member
Joined: Dec 2018
Posts: 247
Likes: 59
From: Lawrence, Kansas
GL320
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2011 GL450 VIN: 4JGBF7BE8BA706134
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Joined: Dec 2018
Posts: 247
Likes: 59
From: Lawrence, Kansas
GL320
https://itstillruns.com/reset-merced...m-7899592.html
Thread Starter
Member
Joined: Aug 2014
Posts: 88
Likes: 8
2011 GL450 VIN: 4JGBF7BE8BA706134
If you have star, there is a self diagnosist test that tells you if one is bad, but if you dont i would run the reset used in this procedure in an attempt to "unstick" one thats stuck.
https://itstillruns.com/reset-merced...m-7899592.html
https://itstillruns.com/reset-merced...m-7899592.html
Will try.
Thread Starter
Member
Joined: Aug 2014
Posts: 88
Likes: 8
2011 GL450 VIN: 4JGBF7BE8BA706134
If you have star, there is a self diagnosist test that tells you if one is bad, but if you dont i would run the reset used in this procedure in an attempt to "unstick" one thats stuck.
https://itstillruns.com/reset-merced...m-7899592.html
https://itstillruns.com/reset-merced...m-7899592.html
I've head it from 5 seconds up to 1 minute. Search google I can't seem to find anywhere where this test is used on ML or GL models...mostly C and E class mercedes.
Senior Member
Joined: Jan 2017
Posts: 254
Likes: 60
From: Houston, TX
Mercedes Benz 2007 GL450 , 2012 BMW 528i
So in the past 2-3 weeks we have been noticing our GL 450 (2011) has been pushing out less cool air. About a week ago, I stopped by autozone just to grab a can of AC-Pro with a gauge.
Connected the gauge just to see where things were. Followed the instructions, and noticed the gauge was showing it was at the top of the "full" (green) level. I thought that was strange. I didn't feel comfortable putting anything in to a pressurized system if it was full, so I didn't.
At the time of doing this, I didn't realize the driver side air was a different temperature than the passenger side, I only realized that tonight. I went through about 15 minutes of testing at various temperatures and determined the longer / harder the fan blew at lower temps the driver side simply lost it's coolness, while the passenger side still remained fairly cool. I don't know if it was at it's coldest level, since it was in the high 70s this evening where I live, but it was significantly colder than the driver side.
I called a local indy place that works on mercedes and they suggested for $250 they could check it out, determine if it's a temperature sensor issue, check the pressures, extract the frion, add new, and add a dye so that it can be checked at a later date in case the leak is small or large.
Before jumping on that, I want to make sure there isn't a simple test or check I can do myself that might be an easier / cheaper solution.
I had read in another forum but for a different make of mercedes about accessing the diagnosis panel via REST, etc.. but I couldn't find something similar with the x164. Following the same steps with this vehicle did not give me any kind of diagnosis panel.
Anyways, thoughts?
Connected the gauge just to see where things were. Followed the instructions, and noticed the gauge was showing it was at the top of the "full" (green) level. I thought that was strange. I didn't feel comfortable putting anything in to a pressurized system if it was full, so I didn't.
At the time of doing this, I didn't realize the driver side air was a different temperature than the passenger side, I only realized that tonight. I went through about 15 minutes of testing at various temperatures and determined the longer / harder the fan blew at lower temps the driver side simply lost it's coolness, while the passenger side still remained fairly cool. I don't know if it was at it's coldest level, since it was in the high 70s this evening where I live, but it was significantly colder than the driver side.
I called a local indy place that works on mercedes and they suggested for $250 they could check it out, determine if it's a temperature sensor issue, check the pressures, extract the frion, add new, and add a dye so that it can be checked at a later date in case the leak is small or large.
Before jumping on that, I want to make sure there isn't a simple test or check I can do myself that might be an easier / cheaper solution.
I had read in another forum but for a different make of mercedes about accessing the diagnosis panel via REST, etc.. but I couldn't find something similar with the x164. Following the same steps with this vehicle did not give me any kind of diagnosis panel.
Anyways, thoughts?
I had the same problem. I added a can with stop leak and dye in it. Its been 1.5 year and it has been working well so far.
Thread Starter
Member
Joined: Aug 2014
Posts: 88
Likes: 8
2011 GL450 VIN: 4JGBF7BE8BA706134
Like I said, the needle (at the time) was at the TOP of the green section of the AC PRO can, therefor the idea of adding anything seemed like a really bad idea. The last 2 times I've checked, the needle has been at the 3/4 mark in the green..but even then, just randomly adding 134a when the gauge isn't even showing low seems reckless.
Senior Member
Joined: Jan 2017
Posts: 254
Likes: 60
From: Houston, TX
Mercedes Benz 2007 GL450 , 2012 BMW 528i
Yes.
Like I said, the needle (at the time) was at the TOP of the green section of the AC PRO can, therefor the idea of adding anything seemed like a really bad idea. The last 2 times I've checked, the needle has been at the 3/4 mark in the green..but even then, just randomly adding 134a when the gauge isn't even showing low seems reckless.
Like I said, the needle (at the time) was at the TOP of the green section of the AC PRO can, therefor the idea of adding anything seemed like a really bad idea. The last 2 times I've checked, the needle has been at the 3/4 mark in the green..but even then, just randomly adding 134a when the gauge isn't even showing low seems reckless.
If you would like to shoot in dark, you can put some more freon in and see if it helps. If you have to pay later to get all freon out, it is worth a shot any way.
You can try use a ultraviolet light to check for leaks hoping that previous fill had UV dye in it if it was ever repaired.
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Joined: May 2015
Posts: 1,932
Likes: 291
From: Allentown, PA
'08 GL 320 CDI
Start by taking it to a shop (any, good, local garage that services AC) and have them do to an evac/refill. I'm not going to say 100% that this is your problem, but slightly low oil can cause the exact problem you are having.
Thread Starter
Member
Joined: Aug 2014
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2011 GL450 VIN: 4JGBF7BE8BA706134
Out Of Control!!
Joined: Aug 2010
Posts: 12,516
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From: Charlotte NC area
2019 WS222 S450 4-Matic / 2007 W211 E350 4Matic (Sold) / 2008 X164 GL320 CDI
Thread Starter
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Joined: Aug 2014
Posts: 88
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2011 GL450 VIN: 4JGBF7BE8BA706134
I ordered a new compressor, got one off ebay. However, and this is important to note....there are 2 specific Denso compressor models that happen to show up as "matches" for GL450's when it comes to 2007-2012s...but AFAIK, only 1 model works for 2006-2008, and one works for 2009-2012.
This is the style (notice the bulkier front) my 2011 GL450 has: https://www.densoproducts.com/product.aspx?zpid=27710 Even the FITMENT tab says 2009-2012. This is #471-1436.
The version that pops up as well is this one: https://www.densoproducts.com/product.aspx?zpid=27765 (notice the front difference), this one is #471-1594. This is the one the ebay store sent me, despite showing a picture of the 1436 AND using 1436 in it's page description.
So I am not even going to attempt to install the 1594 one, who knows if it would even work properly.
