24 GLS450 Major A/C Issues, Is this normal??
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2024 GLS450 2017 GLS450 2013 GL350
24 GLS450 Major A/C Issues, Is this normal??
So to make a very long story short I bought a 2024 GLS450 last July and within a week I was having these strange a/c issues where the front center vents completely stop blowing air. I took it into the dealer I bought it from (which isn't my usual dealer), and they said no problems, no codes, cars perfect! Okay, I didn't think much because I figured I'd take it to my local dealership I usually go to and have them figure it out since I have a long history with them.
I took it to them last summer and they said the same thing. No codes but there is a computer update for a/c so they did that and said that should fix it. It seemed to work for maybe a couple weeks but then the issue was back so I took it back to the dealership with the same issue and a bunch of other random issues I think are related to the computers or electronics.
Same answer which was, No codes means no fixes.
So here we are after 2 MORE TRIPS to the dealership for the a/c issue and again, they tell me there are no codes in the car so there will be no fixing anything. I have dozens of videos of this weird issue and I have sent them to the dealership and my advisor and they told me the technicians and the foreman said this is normal functions and unless a code pops up, they can't do anything and even wrote on my paperwork that my car functions perfectly.
Is anyone experiencing this same issue?
YouTube links of examples
The other reccuring issues I've been having is rain sensing wipers don't sense any water but randomly go off during drive on sunny days, Random viloent shaking or jolt of the engine while sitting in park idleing with auto on/off turned off.
I took it to them last summer and they said the same thing. No codes but there is a computer update for a/c so they did that and said that should fix it. It seemed to work for maybe a couple weeks but then the issue was back so I took it back to the dealership with the same issue and a bunch of other random issues I think are related to the computers or electronics.
Same answer which was, No codes means no fixes.
So here we are after 2 MORE TRIPS to the dealership for the a/c issue and again, they tell me there are no codes in the car so there will be no fixing anything. I have dozens of videos of this weird issue and I have sent them to the dealership and my advisor and they told me the technicians and the foreman said this is normal functions and unless a code pops up, they can't do anything and even wrote on my paperwork that my car functions perfectly.
Is anyone experiencing this same issue?
YouTube links of examples
The other reccuring issues I've been having is rain sensing wipers don't sense any water but randomly go off during drive on sunny days, Random viloent shaking or jolt of the engine while sitting in park idleing with auto on/off turned off.
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GLS 450 (2022), EQE SUV 350 (2025). GLS 450 (2007)
Check the settings on the rear seat air conditioning and the sync button. I had an issue where I could not get any cold air out of the front vents and found that the temperature in the rear seats was set very high and that this overrode the front controls so that no cold air would come out the front. Maybe your problem is related to this. I also took my car to the dealer to have the air-conditioning checked and they told me everything was perfect.
MBWorld Fanatic!
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'23 GLS450
I don't know about MY24 and newer but at least on my MY23 GLS450 build sheet, it had "913 Air conditioning preinstallation for hot countries". If this is missing, could the compressor power be less?
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'23 GLS450
They must have downgraded the compressor capability w/the refresh!
Last edited by EWL5; Apr 23, 2025 at 01:43 PM.
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Thread Starter
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2024 GLS450 2017 GLS450 2013 GL350
Honestly this “refresh” is awful! I like the look but at least in my experience I have never taken a brand new car into service so many times for so many different issues from any manufacturer but definitely not MB. This is my 3rd GLS and it is has the most fickle electronics of any of them, but this ac issue is just too hard to deal with in the southern Ca heat and just doesn’t seem normal!
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MBWorld Fanatic!
Joined: May 2023
Posts: 1,125
Likes: 310
'23 GLS450
Honestly this “refresh” is awful! I like the look but at least in my experience I have never taken a brand new car into service so many times for so many different issues from any manufacturer but definitely not MB. This is my 3rd GLS and it is has the most fickle electronics of any of them, but this ac issue is just too hard to deal with in the southern Ca heat and just doesn’t seem normal!
Senior Member
Joined: May 2019
Posts: 330
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From: Tennessee
2015 MB S550 & 2020 MB GLS 450
Check the settings on the rear seat air conditioning and the sync button. I had an issue where I could not get any cold air out of the front vents and found that the temperature in the rear seats was set very high and that this overrode the front controls so that no cold air would come out the front. Maybe your problem is related to this. I also took my car to the dealer to have the air-conditioning checked and they told me everything was perfect.
Thread Starter
Junior Member
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2024 GLS450 2017 GLS450 2013 GL350
High rear temp? Is that just the menu for the second row seats? Most of the time the air is off in the second row since my kids don't like it if that makes a difference. I also always have sync turned off.
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Joined: Sep 2022
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From: Houston
2021 GLS 450 & 23 GLS 450. Have a Holden Commodore, Jeep, truck, and more
I had a similar issue, but mine was because it was very hot in Texas and the rear AC's were set very cold. The programming prioritizes the cold air to the rear and sacrifices flow to the front vents if needed. I was told the AC case is also a failure point, but mine was fine.
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Junior Member
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2024 GLS450 2017 GLS450 2013 GL350
That is so strange! We haven’t had any crazy heat and if the second row air is on, it’s set to around 72ish because my kids don’t like it too cold . Were you able to find a fix for your car or does it continue to happen if the backseat air is on? I also have a 2017GLS that has been so good we couldn’t part with it. None of these issues on that one!
