EQS EQS (V297) sedan

How reliable is the EQS?

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Old Dec 21, 2024 | 02:13 AM
  #1  
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How reliable is the EQS?

I have a 2022 Mercedes EQS 450+ sedan.
I’m right now at nearly 17k miles odometer. I wonder have anyone passed 100k mile odometer on this car?
With you? How do you think the reliability for this car? Is the battery still good until 100k mile point and beyond? how expensive is your maintenance for each year?

For my experience:
i have a very weird squeaking sound comes from my front right suspension. went to dealership and service it. they changed my suspension but still have squeaking sound and they tell me to wait from Mercedes announcement as there are a lot of other EQS have the same problem as mine.
Maybe I’ll come to another dealership to inspect and service on it again? What do you think?

with me everything else of this car is very great until now
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Old Dec 21, 2024 | 06:33 AM
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2008 CL550, 2022 EQB 300, 2023 EQS 450 4Matic
30,000 on ours with no problems. I saw one with 77,000 miles for sale and looked at the Carfax, curious what had been replaced. Nothing...just tires and computer updates. Battery should have maybe a 5% loss by 100,000 miles unless it has been mistreated.
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Old Dec 21, 2024 | 07:25 AM
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Almost 35K on mine and no problems except the software updates. It has been aswsome, best car I've ever had.
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Old Dec 21, 2024 | 08:14 AM
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you have over the air updates?
i dont receive mine since june of this year.
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Old Dec 21, 2024 | 09:14 PM
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Originally Posted by nath_h
30,000 on ours with no problems. I saw one with 77,000 miles for sale and looked at the Carfax, curious what had been replaced. Nothing...just tires and computer updates. Battery should have maybe a 5% loss by 100,000 miles unless it has been mistreated.
The battery will lose a lot more than 5% by 100k miles! You will need a new battery by that point.

I already have 40% loss in winter! I know that’s temp related but the battery is the weak link to the entire car, and replacing it will cost more than the car is worth.

Not trying to be negative. I have an EQS in the driveway. Just being realistic.
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Old Dec 21, 2024 | 09:16 PM
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Originally Posted by hlothery
Almost 35K on mine and no problems except the software updates. It has been aswsome, best car I've ever had.
I have 12k km on mine. Has been great. No issues. Well one time the software freaked out but it reset itself and has been fine since.

There are a lot of advantages to the car and I like it overall but it’s far from the best car I ever had. That award would go to my 2019 G550.

Sadly the EV battery tech is nowhere near where it needs to be for long term ownership, so at the end of the lease it’s going back.
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Old Dec 22, 2024 | 06:57 AM
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2008 CL550, 2022 EQB 300, 2023 EQS 450 4Matic
Originally Posted by Surge
The battery will lose a lot more than 5% by 100k miles! You will need a new battery by that point.

I already have 40% loss in winter! I know that’s temp related but the battery is the weak link to the entire car, and replacing it will cost more than the car is worth.

Not trying to be negative. I have an EQS in the driveway. Just being realistic.
There's a lot of data about capacity loss, so guessing is not needed. While experiences vary, 5% at 100,000 miles is a likely number for most people. If you Google articles about ev range loss over time, you'll find lots of articles...I'll paste one in below. I think the Engineering Explained guy did a video on this too. While your winter range number is real, it really isn't loss in terms of permanent capacity loss, just a reflection of the battery chemistry not working well under extreme conditions. At any rate, the EQS has plenty of range for my needs, and even a 20% loss would not impact my daily life.

https://insideevs.com/news/733987/ev...adation-study/
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Old Dec 22, 2024 | 09:15 AM
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Since EVs are so new, there is very little data on how long batteries last, and maintain a charge of 95%. What I am seeing is brand new EVs that require battery replacements. While a non-zero error rate is normal, the fact that my local dealership has replaced 3 this year is somewhat concerning when it comes to long-term longevity.

Since the batteries are the same as what we have in laptops, for example, and seeing how a laptop battery needs to be replaced every 4-5 years, I’m not going to bet that the EV battery will last much longer. It will probably fail soon after the 8 year warranty expires. And by “fail”, I don’t mean even a ~20% reduction, I mean the battery simply won’t provide power.

The last point I will make is that the range indication is just an estimate. So even if it says range is 95% of when the batt was new, I would not trust that it’s accurate. The range indication is pretty good, but there’s ~10% margin of error even now, when the car is still fairly new. The margin of error as the battery ages may very well increase.

Unfortunately, the battery needs to be treated as an expensive, expendable item.
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Old Dec 22, 2024 | 04:58 PM
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Originally Posted by Surge
The battery will lose a lot more than 5% by 100k miles! You will need a new battery by that point.

I already have 40% loss in winter! I know that’s temp related but the battery is the weak link to the entire car, and replacing it will cost more than the car is worth.

Not trying to be negative. I have an EQS in the driveway. Just being realistic.
Where do you experience a 40% loss? I can see the range going down 20% at 20 degrees in my locale.
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Old Dec 22, 2024 | 05:30 PM
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Originally Posted by HBerman
Where do you experience a 40% loss? I can see the range going down 20% at 20 degrees in my locale.
Max range is 300km vs 500km in the summer.

Drove in the city, including some highway today for 40km and consumed 40 kWh/100km. In summer it’s about 24.
Earlier this week drove 200km to my lake house, which normally consumes 45% of the battery. This time it was 70%. Started with 75% charge and almost didn’t make it.

it’s Exactly 40% less. Outdoor temp about -10C/14F, so it’s cold; but even at -5C/20F it’s not much better.

This is much much worse than a gas car’s range reduction in winter!

This also implies longer charge times, since you have more battery to recharge. Sort of a double whammy.

This applies to every single EV, nothing to do with the EQS specifically, nor its reliability.

Last edited by Surge; Dec 22, 2024 at 05:32 PM.
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Old Dec 22, 2024 | 07:20 PM
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Originally Posted by HBerman
Where do you experience a 40% loss? I can see the range going down 20% at 20 degrees in my locale.
From my 18 month old EQE SUV with 12,000 miles, charging to 80%:
- est 283 miles in July after a mix of city & highway driving, ~75F
- est 310 miles in August after mostly city driving, ~70F
- est 170 miles in December after highway driving, 20F
the latter is over a 40% drop from August to December.
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Old Dec 22, 2024 | 08:21 PM
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I've certainly seen no evidence of capacity loss so far. Yes, there are major range estimate differences in Winter, but that is not capacity loss, as that changes right back to what it was when warm weather returns and the battery does not have to heat itself and me. Those changes happen frequently in Winter in Texas. My EQS has been awesome. I know it will eventually happen, but not so far at 35K miles and 3 years.
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Old Dec 22, 2024 | 10:47 PM
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42k here. Never needed service. As an early adopter I had the original glitches such as the thump when accelerating from a stop, mubux going on the fritz when updating and such. They always al resolved themselves in short irder or were solved by over the air updates. Aside from ealy build software issues the car has been utterly reliable. It has never left me stranded. Since my last software update a year ago even the software occasinal booboos have gone away too! Now if I could "fix" the drivers door autopinch sensor working erratically ( an issue I've had on every MB I have ever owned), I would give it a 100% reliable rating.
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Old Dec 22, 2024 | 11:49 PM
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42k here. Never needed service. As an early adopter I had the original glitches such as the thump when accelerating from a stop, mubux going on the fritz when updating and such. They always al resolved themselves in short irder or were solved by over the air updates. Aside from ealy build software issues the car has been utterly reliable. It has never left me stranded. Since my last software update a year ago even the software occasinal booboos have gone away too! Now if I could "fix" the drivers door autopinch sensor working erratically ( an issue I've had on every MB I have ever owned), I would give it a 100% reliable rating.
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Old Dec 23, 2024 | 08:24 AM
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Originally Posted by Surge
Since EVs are so new, there is very little data on how long batteries last, and maintain a charge of 95%. What I am seeing is brand new EVs that require battery replacements. While a non-zero error rate is normal, the fact that my local dealership has replaced 3 this year is somewhat concerning when it comes to long-term longevity.

Since the batteries are the same as what we have in laptops, for example, and seeing how a laptop battery needs to be replaced every 4-5 years, I’m not going to bet that the EV battery will last much longer. It will probably fail soon after the 8 year warranty expires. And by “fail”, I don’t mean even a ~20% reduction, I mean the battery simply won’t provide power.

The last point I will make is that the range indication is just an estimate. So even if it says range is 95% of when the batt was new, I would not trust that it’s accurate. The range indication is pretty good, but there’s ~10% margin of error even now, when the car is still fairly new. The margin of error as the battery ages may very well increase.

Unfortunately, the battery needs to be treated as an expensive, expendable item.
That's why the battery has a 10 year/155,000 warranty. It may or may not be expendable and is expensive, but it is Mercedes' problem. I'd be thrilled if I got a new battery under warranty 8 years from now.

But those of us on this forum...seriously, are we driving around 10 year old cars out of warranty? Unlikely, unless it is a classic. We've all got the newest latest greatest.
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Old Dec 23, 2024 | 12:54 PM
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Originally Posted by nath_h
That's why the battery has a 10 year/155,000 warranty. It may or may not be expendable and is expensive, but it is Mercedes' problem. I'd be thrilled if I got a new battery under warranty 8 years from now.

But those of us on this forum...seriously, are we driving around 10 year old cars out of warranty? Unlikely, unless it is a classic. We've all got the newest latest greatest.
The consensus is that EV batteries maintain 80% capacity about 15 years on average. That does not include the Nissan Leaf that used air cooled batteries. The fact that a battery needs replacement does not un any way mean its worn out. Like any other component, there are multiple other failure modes that might require replacement of another otherwise "healthy" battery. Manufacturers see it as simpler and more expidient to replace a battery than to try to fix it. Working on an EV battery, takes special training, tools and is in fact quite risky if you don't have the tools and training to do so. Thats why BMW and Mercedes don't allow you to mess with anything under the hood. It can get "sparky" if you touch what you're not supposed to. In reality its mostly a lawyer thing, since you can very easily and safely jumps start the 12V system which is really the only thing you could ever do.

Last edited by c4004matic; Dec 23, 2024 at 12:59 PM.
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