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I couldn't find a thread on this, but I got a notification on my screen that I need to add some coolant to my car. It says to use Infiniti coolant or BASF Glysantin G40. I don't feel like driving over to my dealership for such a small thing. But, it doesn't seem like BASF Glysantin G40 is sold in regular auto shop stores. Or is it? Any ideas?

Thanks!
 

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Same thing is happening with my QX30. I only get the Check Coolant message first start up of the day when it's cold outside like 45 degrees or below. After that it's fine and all subsequent starts don't have the message and it's not even stored in the Messages area. The dealership says to check to see if I'm actually low on coolant but wouldn't it always have that error message and not just on first start up? And the manual isn't really clear on how to check. The diagram is horrible.
 

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Discussion Starter #6
Same thing is happening with my QX30. I only get the Check Coolant message first start up of the day when it's cold outside like 45 degrees or below. After that it's fine and all subsequent starts don't have the message and it's not even stored in the Messages area. The dealership says to check to see if I'm actually low on coolant but wouldn't it always have that error message and not just on first start up? And the manual isn't really clear on how to check. The diagram is horrible.
Exactly my same scenario. Under 45 degrees, first thing in the morning only. And I finally checked in the morning before first start, and it's totally full. You can follow the manual or just eyeball it really. In my case, the coolant is almost to the top before start, so it is definitely not low.
 

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I had same issue......

Exactly my same scenario. Under 45 degrees, first thing in the morning only. And I finally checked in the morning before first start, and it's totally full. You can follow the manual or just eyeball it really. In my case, the coolant is almost to the top before start, so it is definitely not low.
Dealer ended up replacing the coolant reservoir. It has the coolant level sensor built in. Since it was swapped out, no more "Check Coolant Level" message
 

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Make that four. I've also had this issue since late August or so. I'm actually out of the country and have been for the past month, so I haven't taken the car to the dealership. The message goes away after about five minutes of driving, so I really didn't bother to check the level out of pure laziness. I'm sure it's minor, but it just made me ask what is it with German platforms and cooling issues?
 

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And make that 5, coolant was not actually low and I'm getting a new reservoir (which is back ordered). I wasn't able to find the G40 anywhere locally, which I mentioned to the dealer - they said it was good that I didn't use anything else and to stop by and get it from them if I actually ever need any.
 

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Make that 6. Same symptoms as described by Zee. FWIW, I had the same issue with my 2015 QX50. Dealer had to replace the reservoir on it. You'd think they would have corrected the problem by now.
 

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Here's an update from my end. Last week, I had to drive from Maryland to Massachusetts, a 450-mile drive, so I decided to check the coolant level. It was definitely low and barely able to form a meniscus in the coolant reservoir. Right now, I'm at 26.2K miles. I brought it into the dealership and they did a coolant pressure check and determined that there were no leaks. The topped off the coolant and burped the system. There must have been air in the system from the factory (my guess).

Based on a few posts, I think people fall into either the faulty coolant sensor camp or the low coolant camp.
 

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Yesterday I got the low coolant message upon start up, at right around 45 degrees. The coolant was full. The message has not returned. Yet.
 

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I had the reservoir replaced mid-December; no problems since. @Rapidfirerob4 when I first noticed the light coming on, it only happened once. And then twice. And then seemingly more frequently over the course of ~2-3 weeks.
 

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2017 QX30 w/ 12 miles.

So far NO Engine Coolant warning lights - but I get BSM inoperative warning when starting the car in the morning (35 or below degrees). BSM warning goes away after restarting.
 

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A small addition to this thread:

I had some issues with the cooling system losing fluid as well, but for a different reason:

Over the course of 3 months the car lost about half a liter (or quart) of coolant. There was coolant visible under the hood all over the left side of the 2.0l engine. Suspected the thermostat or waterpump. After 6 months I got tired of it and had the system pressurized to check for leaks. There are 2 small coolant lines which hook into the turbo, located on the front side of the engine, center left side, right next (left) to the heat shield. Checked the mercedes epc for parts and there are 2 small rubber seals (A0299973745 from the mercedes dealer) on these coolant lines, bought some new ones for 3 euro/dollar total on a gamble, and replaced them (easy job, remove the clamp, pull out hoses, remove old seals, lube the new seals and replace, clamp down) and have had no issues since.
2361
 

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@tomrs I just dropped mine in this morning for what looks like the same issue, coolant leaking around the turbo area. I had the coolant low light pop up and topped up the fluid about 2 months ago, checked it again and it was about an inch lower so did some poking around and found some drops. Problem is the dealer said "This could take a few days as we need to ship in the specialised part, the whole coolant line from the turbo needs replacing" so i've got a weeks wait. Here is a pic I took looking up towards the rear of the turbo, you can see the dried and fresh coolant around and where it looks like it is coming from.
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@tomrs I just dropped mine in this morning for what looks like the same issue, coolant leaking around the turbo area. I had the coolant low light pop up and topped up the fluid about 2 months ago, checked it again and it was about an inch lower so did some poking around and found some drops. Problem is the dealer said "This could take a few days as we need to ship in the specialised part, the whole coolant line from the turbo needs replacing" so i've got a weeks wait. Here is a pic I took looking up towards the rear of the turbo, you can see the dried and fresh coolant around and where it looks like it is coming from. View attachment 2362
Did they provide you with a quote as well? 1 of those 2 coolant lines is wrapped in between the engine and might be quite expensive/difficult to replace. That is exactly the reason I tried these seals myself first;)

The picture looks quite similar to mine btw, any coolant visible on the front of the turbo?
 
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