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Apart from the color, the coolant level in the 2 reservoirs seems to be significantly higher than what I have noticed in mine. Did you ever top up coolant/ added extra?
@EQBFan I did add coolant. I was annoyed with the sound of trickling coolant in the cold early morning from what I believe was air in the system. So I employed an old aquarium draining technique and filled the levels above that of those three awkwardly high coolant lines towards the front of the “engine bay”. I also noted the “trick” to the service advisor when I brought it in for its 11k mi first service, and the tech topped them both off the exact same way. I actually do not hear that meadow brook sound (which I believe was air) any longer. Sadly something happened and the coolant in just that one side has become opaque.
I asked the SA to have the 12 V checked as I got a pre-safe type error after charging a second time, as I suspect a weak 12 V…
My EQB just came after its first service. Coolant level was a little lower than the max indicated on the reservoir but the dealer did not feel the need to top up the coolant.
I do have a can of coolant lying with me that I got from Amazon. Can someone confirm if this is the appropriate coolant? Also, in 2 minds whether I should top up the coolant. Any suggestions?
I'm used to the old MB standard of blue, but I checked and pink seems to be what they are using in modern cars. And yes, fill it up to the full line. In the future if you need to check what product to use, check the back of the owners manual under specifications.
I'm used to the old MB standard of blue, but I checked and pink seems to be what they are using in modern cars. And yes, fill it up to the full line. In the future if you need to check what product to use, check the back of the owners manual under specifications.
What still has me confused is whether the EQB comes under "Smart Electric Drive" or "All other model series" in their specifications for Operating fluids. Funnily no EV models are listed there. https://operatingfluids.mercedes-benz.com/sheet/320.1
I know it is confusing, but if you zero in on the 320 sheet, it still says to use 326. Because these cars are so new and people haven't had time to dump in the wrong stuff, you can be pretty confident between the operating fluid spec sheet and common sense of matching color that you are okay.
New owner of a '23 EQB 350. I have the red and black caps. Had the coolant imbalance issue and warning light on dash pop up. Was able to correct the issue as suggested, BUT WHY IS THIS HAPPENING? OP says "engineering oversight", but that's not an answer. We're all going to have broken hood latch cables because of this.
Problem hasn't recurred in 1-1/2 years. I've crossed it off my worry list. In fact, I've had no problems at all with the car since. Quiet, smooth, great outward visibility, bank vault solid, and can beat most cars across an intersection.
Problem hasn't recurred in 1-1/2 years. I've crossed it off my worry list. In fact, I've had no problems at all with the car since. Quiet, smooth, great outward visibility, bank vault solid, and can beat most cars across an intersection.
Good for you, AWZ, but that still doesn't answer the question as to why this is happening and what can be done if the correct caps are already in place yet the problem persists. Someone is going to burn their hands and fry some electronics (or worse) if they try to fix this incorrectly while the coolant is hot.
It happens every 200-300 miles after relieving the pressure. I even swapped the cap with the one from my SL, they are the same part number. I am dropping it off at the dealer next week. There is an EQ forum from Europe where this issue is discussed more, apparently more EQs in Europe than here.
It does seem to be the facelift. (We leased a VinFast VF9 in November so my wife was really firm on getting a good deal or just walking and eating the $38xx over mileage fee). My son borrowed it this morning haha, try to take a pic later...
It does seem to be the facelift. (We leased a VinFast VF9 in November so my wife was really firm on getting a good deal or just walking and eating the $38xx over mileage fee). My son borrowed it this morning haha, try to take a pic later...
I see, those things are getting popular here too in Canada.
Ya the 2024 seems to be the facelift, it is actually not that hard to tell the differences, the taillights are no longer circles and became a line, the steering wheel is mainly capacitive touch now, no more physical buttons. The headlights and grille is also different and the front bumper if I recalled correctly. Subtle but still recognizable.
Ya the 2024 seems to be the facelift, it is actually not that hard to tell the differences, the taillights are no longer circles and became a line, the steering wheel is mainly capacitive touch now, no more physical buttons. The headlights and grille is also different and the front bumper if I recalled correctly. Subtle but still recognizable.
The salesman "in training" did tell us it is facelifted. But I started to not trust him when he told my wife that the difference between the 250+ and this 300 is more power and more range. I knew the 300 has less range, but am coming to the realization that it is significantly less. It does drive noticeably more stable so I guess we will just have to adjust to more frequent charging. (I go in the wee early hours of the morning for the free EA charging, and let it charge a few USDs for the extra to reach 80%). I may try to add air to the tires as they put it close to 40 PSI and I prefer around 45 PSI.
I'll try to listen for the air concern I had on a cold morning with heater activated. Hopefully they improved their initial fill technique...
The salesman "in training" did tell us it is facelifted. But I started to not trust him when he told my wife that the difference between the 250+ and this 300 is more power and more range. I knew the 300 has less range, but am coming to the realization that it is significantly less. It does drive noticeably more stable so I guess we will just have to adjust to more frequent charging. (I go in the wee early hours of the morning for the free EA charging, and let it charge a few USDs for the extra to reach 80%). I may try to add air to the tires as they put it close to 40 PSI and I prefer around 45 PSI.
I'll try to listen for the air concern I had on a cold morning with heater activated. Hopefully they improved their initial fill technique...
Ya better off doing research yourself not trusting them too much.
For a liquid Pascal's Law/Principle states that all points in the system have equal pressure.
We have two different sized containers somehow connected together, meaning not completely separated, and the temperature on one side doesn't always equal the temperature on the other, the air volumes are not equal to boot...
If you want to try to stop the imbalance your best bet, after getting rid of the air (that our '24 appears to suffer), fill both sides to the brim/top. I also replaced the red cap with a black cap. Not sure why the Mercedes engineers decided to make it that way vs completely separate systems like other manufacturers...
For a liquid Pascal's Law/Principle states that all points in the system have equal pressure.
We have two different sized containers somehow connected together, meaning not completely separated, and the temperature on one side doesn't always equal the temperature on the other, the air volumes are not equal to boot...
If you want to try to stop the imbalance your best bet, after getting rid of the air (that our '24 appears to suffer), fill both sides to the brim/top. I also replaced the red cap with a black cap. Not sure why the Mercedes engineers decided to make it that way vs completely separate systems like other manufacturers...
This warning has just come up on our EQA 250 (2022, 40,000kms) and, despite filling up the coolant and letting the liquid equalize in both chambers, it still comes up with the error. Is there any other way to bleed the system? I was thinking of driving a short while and see if any air lock frees itself ... Or, do I have a genuine problem that Mercedes need to deal with?
This warning has just come up on our EQA 250 (2022, 40,000kms) and, despite filling up the coolant and letting the liquid equalize in both chambers, it still comes up with the error. Is there any other way to bleed the system? I was thinking of driving a short while and see if any air lock frees itself ... Or, do I have a genuine problem that Mercedes need to deal with?
The official Mercedes instructions typically have a SST (special service tool) which last I saw was powered by the vehicle battery to vacuum bleed/fill... Unless you're a mechanic and serious about servicing Mercedes vehicles don't bother researching the tool as it is $2000+ USD. There are aftermarket tools much cheaper that can do the same thing, just need to adapt it to fit.
With a 2022 how long ago did you purchase? Was it new? At 3 years old I would advise to bring it to the dealer or reputable EV shop. Make sure they use the correct coolant, if not a Mercedes dealer as there appear to be many types beyond the old sheet no. 325.0, or buy the coolant at the dealer and bring it with you.
You could try what I did with our old '23 EQB lease which was fill both reservoirs to the top with correct mixture of coolant. Not sure if you noticed but opening the driver door will cause some noise and that is actually a coolant pump, the level in one of the reservoirs (the smaller one) goes down and you can add even more but quickly close the cap as it will overflow out as the accumulator relaxes....
The official Mercedes instructions typically have a SST (special service tool) which last I saw was powered by the vehicle battery to vacuum bleed/fill... Unless you're a mechanic and serious about servicing Mercedes vehicles don't bother researching the tool as it is $2000+ USD. There are aftermarket tools much cheaper that can do the same thing, just need to adapt it to fit.
With a 2022 how long ago did you purchase? Was it new? At 3 years old I would advise to bring it to the dealer or reputable EV shop. Make sure they use the correct coolant, if not a Mercedes dealer as there appear to be many types beyond the old sheet no. 325.0, or buy the coolant at the dealer and bring it with you.
You could try what I did with our old '23 EQB lease which was fill both reservoirs to the top with correct mixture of coolant. Not sure if you noticed but opening the driver door will cause some noise and that is actually a coolant pump, the level in one of the reservoirs (the smaller one) goes down and you can add even more but quickly close the cap as it will overflow out as the accumulator relaxes....
Thanks, I’ve tried exactly what you suggested although didn’t brim the chambers; probably 2cms from the top in each. I’ve used coolant that I bought directly at the dealer parts counter. The small chamber does go down although the liquid doesn’t disappear anymore at least. Sadly, the warning remains (although my wife hasn’t driven the car since I did this and maybe the air will work itself up and out (if that’s actually the problem?). I’ve booked it into the dealer in a couple of weeks to resolve in case it doesn’t mysteriously go away before then 😉
Thanks again!
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