GL Class (X166) 2013-2015 after facelift became GLS (X166)

2013 GL450 leaked all coolant on garage floor

Old Oct 17, 2014 | 05:21 PM
  #1  
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2013 GL450 leaked all coolant on garage floor

Hey everyone,

This is weird: we got home today, and 10 minutes after we shut the car off, we went into the garage and found coolant all over the floor from our GL450 (with a puddle exactly where the coolant reservoir is and the coolant going all the way to the back of the car). The car (appropriately) said "check coolant level," so we called mbrace roadside and they're going to tow the vehicle. Kind of odd for a 33,000 mile, 2013 GL that has been serviced, and had nothing wrong until 10 minutes after we stopped driving.

Will keep everyone posted. Has anyone had any similar experiences?

Thanks!
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Old Oct 17, 2014 | 05:52 PM
  #2  
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2013 GL450 (traded for 2015 Escalade), 2012 Corvette, 2014 Ford Fusion, Previous: 2007 GL450, 2011
Originally Posted by cjaredscott
Hey everyone,

This is weird: we got home today, and 10 minutes after we shut the car off, we went into the garage and found coolant all over the floor from our GL450 (with a puddle exactly where the coolant reservoir is and the coolant going all the way to the back of the car). The car (appropriately) said "check coolant level," so we called mbrace roadside and they're going to tow the vehicle. Kind of odd for a 33,000 mile, 2013 GL that has been serviced, and had nothing wrong until 10 minutes after we stopped driving.

Will keep everyone posted. Has anyone had any similar experiences?

Thanks!
Back in the "old days" .... that kind of situation would indicate a water pump failure! Have no idea if that is still viable ..... In any case, keep us posted. My 13 GL 450 has 30K on the ticker!
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Old Oct 18, 2014 | 04:45 PM
  #3  
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'15 GL450
I had a '09 GL450 do the same thing at less than 1,000 miles. It smelled and looked like coolant fluid. I took it in and the service tech told me that it was the transmission cooling system. I guess these AWD vehicles have a separate cooling system.
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Old Oct 18, 2014 | 08:19 PM
  #4  
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Originally Posted by blittle
Back in the "old days" .... that kind of situation would indicate a water pump failure! Have no idea if that is still viable ..... In any case, keep us posted. My 13 GL 450 has 30K on the ticker!
I'm not sure either, but will definitely keep that in mind!

Originally Posted by luv2sleep
I had a '09 GL450 do the same thing at less than 1,000 miles. It smelled and looked like coolant fluid. I took it in and the service tech told me that it was the transmission cooling system. I guess these AWD vehicles have a separate cooling system.
That's really interesting. I did not think of that!

The dealer called and said that they spent a good amount of time today trying to figure out just what happened and that their tests were completely inconclusive. In the mean time, I'm stuck with two loaners: a '15 GL450 for my '13 GL450, and a '15 ML350 for my '12 GL450 (which was due for service, and we left there as that's the car we drove to the dealer while the other one was being towed). On a kind of irrelevant note that is also still relevant, I am really not a fan of the new V6 in the GL450 -- at least compared to the M278 4.6 liter V8. Interestingly, the dealer said today that they want to let us out of the '13 lease and allow us to get a new '15...it will probably end up being a GL550 now.

Will keep everyone posted. Ideas, comments, questions, etc are always welcome!

Also, check out the pictures I attached. It's not really clear, but there's a really big puddle of coolant (or whatever it is) right under where the reservoir supposedly is. Then we moved it outside, and same thing (more clear here).
Attached Thumbnails 2013 GL450 leaked all coolant on garage floor-img_6258.jpg   2013 GL450 leaked all coolant on garage floor-img_6247.jpg   2013 GL450 leaked all coolant on garage floor-img_6256.jpg   2013 GL450 leaked all coolant on garage floor-img_6252.jpg   2013 GL450 leaked all coolant on garage floor-img_6250.jpg  


Last edited by cjaredscott; Oct 18, 2014 at 08:25 PM.
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Old Oct 19, 2014 | 10:08 PM
  #5  
Dalema's Avatar
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GL550
Sure it's coolant - email the tech you're photos? Let us know what they find out.

Had you recently filled it - wondering if it was overflow after a hot run as it doesn't look like too much fluid.
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Old Oct 21, 2014 | 03:14 AM
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Looks like water to me, completely normal.

M
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Old Oct 21, 2014 | 11:27 AM
  #7  
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Originally Posted by Dalema
Sure it's coolant - email the tech you're photos? Let us know what they find out.

Had you recently filled it - wondering if it was overflow after a hot run as it doesn't look like too much fluid.
Sorry -- I meant to post this response yesterday morning, but I got really busy throughout the day and the internet wasn't working reliably for some reason. Here's that response:

No, I'm just assuming it's coolant -- it certainly could be something else. Emailing the tech's the pictures today. I haven't filled it recently. There's actually more that you can't really see from the pictures in a puddle (it looks like less than there actually was). It's kind of odd.

I'll keep everyone posted!

Thanks!
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Old Oct 21, 2014 | 11:52 AM
  #8  
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Originally Posted by Germancar1
Looks like water to me, completely normal.

M
That's what I thought, but it's blue and smells like coolant. And when we turned the car's electronics on, it said something to the extent of "no coolant" and the engine wouldn't start. (I think I forgot to mention that before -- my bad)

Thanks. Will keep everyone posted.
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Old Oct 21, 2014 | 01:14 PM
  #9  
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Originally Posted by cjaredscott
That's what I thought, but it's blue and smells like coolant. And when we turned the car's electronics on, it said something to the extent of "no coolant" and the engine wouldn't start. (I think I forgot to mention that before -- my bad)

Thanks. Will keep everyone posted.

Now we're cooking, yeah that would be a problem.

M
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Old Nov 4, 2014 | 02:18 PM
  #10  
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What was the verdict on this one?

M
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Old Nov 4, 2014 | 08:57 PM
  #11  
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Originally Posted by blittle
My 13 GL 450 has 30K on the ticker!
What? You've been coasting. I'm at 32K.

I just passed 2 years old last Friday (took delivery on Halloween 2012), and I know yours is younger than mine, so you'll pass me soon.
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Old Nov 6, 2014 | 04:33 PM
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2013 GL450 (traded for 2015 Escalade), 2012 Corvette, 2014 Ford Fusion, Previous: 2007 GL450, 2011
Any more info?
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Old Nov 22, 2014 | 10:56 PM
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Sorry everyone -- I got really busy over the past few weeks. I got the car back, and the dealer said it was a valve issue. It's been running perfectly since, though!
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Old Nov 23, 2014 | 07:40 AM
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2013 GL450 (traded for 2015 Escalade), 2012 Corvette, 2014 Ford Fusion, Previous: 2007 GL450, 2011
Originally Posted by cjaredscott
Sorry everyone -- I got really busy over the past few weeks. I got the car back, and the dealer said it was a valve issue. It's been running perfectly since, though!

Hmmmm....wonder what he meant by that? What "valve" ( assuming a closing/not closing issue ) would cause that?
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Old Nov 24, 2014 | 02:39 AM
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You can't do that to us man!!!! LOL. More explanation is needed ASAP!!! Was is coolant or something else? What valve?

M
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Old Jun 1, 2016 | 04:34 AM
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Mercedes 450 gl
Red face Gl 450 -2013 coolant leaking in driveway

My warning light went on went to gas station to check. Attendant wanted to see manual and then decided he was uncomfortable using universal coolant so I called Mercedes emergency road side service hoping for guidance on recommended fluid but she explained she had no info could only offer a tow so organized a tow to dealership which is not open so don't know results of assessment. When Vehicle was moved to get it on flat bed I noticed drops of fluid all over the driveway where the vehicle had moved. Had not noticed this prior. But the light was on earlier and attended at first glance didn't think it was too low or that the temp was too high. But after reading manual he determined it was low enough to require more coolant.

I think that the Mercedes road side assistance reps should be able to share the recommended brand of fluid so that a person can top it up to be able to drive to service Dept. We are not always going to be near a service station.
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Old Feb 27, 2017 | 04:59 PM
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2013 GL450
Just curious...what was the result of this and the cost? I just had the exact same issue with my 2013 450. Thanks
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Old Mar 1, 2017 | 09:25 AM
  #18  
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2013 GL450
I had a similar issue on my 2013 GL450 with approx 22K miles when it happened. Got the low coolant level warning. One morning, I found a puddle under the driver side hood. I topped off the coolant and made an appointment a few days later to the dealer.
They changed the hose on it and seems to resolved the issue. Was covered under warranty.
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Old Mar 2, 2017 | 08:00 AM
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2013 GL450
Thanks...I got it fixed. Unfortunately, I'm about 5,000 miles past the warranty. The fix cost ~$500. Hard to believe they put such a cheap hose there for the coolant that it would wear completely through in just a few years!!!
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Old Jul 14, 2017 | 11:23 AM
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2013 GL450
Originally Posted by jlockm
Thanks...I got it fixed. Unfortunately, I'm about 5,000 miles past the warranty. The fix cost ~$500. Hard to believe they put such a cheap hose there for the coolant that it would wear completely through in just a few years!!!
I just have a similar problem, the turbo charger coolant line connector is broken : http://www.carpartsdiscount.com/auto/parts/catalog/mercedes_benz~gl450.html?3593=567096&3671=1002&r=2 &gclid=CjwKEAjw16HLBRDF9L2UmOCH7U8SJAASVESoHuAyaPo 9ED2EWldWRRPNekbcFBK4ThH0F0QK_qgA_xoCD3Pw_wcB

mine was a 2013, somewhat disappointed with the quality of these plastic parts...
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Old Dec 9, 2019 | 05:00 PM
  #21  
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2013 GL450
i had the turbo coolant pipe issue couple of years ago and an indy shop replaced the pipe.

lately i have noticed a slow leak (last time when the coolant pipe went bad the leak was quicker, i'd refill and next day it would be low again), the low indicator would come on every a few months and i have been topping it up. lately i have noticed small puddle (not a lot maybe a few drops) on my garage floor semi-regularly (seems like if i leave the car there long enough i will see some), under the the driver side front pumper. looking under the hood i can see some liquid pooled on the tray around there. took it to another indy but the guy said he pressure tested it and can't find the leak?
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