EQS EQS (V297) sedan

450+ died: "Drive system malfunction"

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Old Oct 24, 2022 | 03:45 AM
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EQS 450+
450+ died: "Drive system malfunction"

I had a nice, long 4 hour visit to the donut shop yesterday. After returning back to my car with a box of brunch-time donuts, the car refused to turn on, reporting a "Drive system malfunction". I had to wait several hours for Mercedes roadside assistance to find a tow-truck to make matters worse.

The car was working fine when I parked. However, just as I entered the parking lot, the car did bottom out on a swell at the mouth of the lot. So much for the intelligent, road-sensing air suspension doing its job. Maybe just coincidence? Another issue popped up after about 20 minutes, the alert to charge the 12V battery. I have my fingers crossed that this is the source of the problem.

Has anyone experienced anything like this with their EQS? A google search doesn't lead to any real hits related to Mercedes.
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Old Oct 24, 2022 | 06:20 AM
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Which "intelligent, road-sensing air suspension"?
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Old Oct 24, 2022 | 06:27 AM
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I wonder if this is the beginning of things to come? Seems like it could be, but good luck to you!
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Old Oct 24, 2022 | 07:20 AM
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I bet that this is a 12V battery issue. I wish Mercedes provided a voltmeter for the 12V battery as Porsche does. Please let us know the outcome at the Mercedes dealer.
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Old Oct 24, 2022 | 09:03 PM
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Originally Posted by Diesel Benz
Which "intelligent, road-sensing air suspension"?
You can read more about the air suspension here.

You know, now reading through it again more carefully, I think I inferred things that were not actually implied. They talking about intelligent dampening, keeping a level height, sensors, etc, but not in a holistic manner. They talk about going over a bump, but only in that the dampeners keep the shock from going to the other wheels. They talk about adjusting height, but primarily based on speed or weight of the occupants.

I think one of the major benefits of air suspension for other cars is the driver being able to control the height manually, often important when trying to prevent a car from bottoming out while leaving a driveway or parking lot. Mercedes has even had that ability in other models but didn't bother with the EQS.

Still no word from the dealership, but my fingers are crossed that recharging the 12V battery will resolve the issue.
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Old Oct 25, 2022 | 02:38 AM
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Did EQS still have the "fully raised" state for towing the car onto a flatbed or tow truck? Too difficult to use for normal parking (cannot be used at speed) but might save the the car floor at some rare bumps if noticed in advance and no other traffic behind.
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Old Oct 25, 2022 | 03:02 AM
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Originally Posted by Diesel Benz
Did EQS still have the "fully raised" state for towing the car onto a flatbed or tow truck? Too difficult to use for normal parking (cannot be used at speed) but might save the the car floor at some rare bumps if noticed in advance and no other traffic behind.
There was an older thread about the inability to raise or lower the suspension. Someone pointed out in the manual where the setting is supposed to be, but others were unable to find it. Some theorized maybe the option was maybe removed in the US for the EPA range.
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Old Oct 27, 2022 | 01:35 AM
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EQS 450+
Originally Posted by SirNH
I had a nice, long 4 hour visit to the donut shop yesterday. After returning back to my car with a box of brunch-time donuts, the car refused to turn on, reporting a "Drive system malfunction". I had to wait several hours for Mercedes roadside assistance to find a tow-truck to make matters worse.

The car was working fine when I parked. However, just as I entered the parking lot, the car did bottom out on a swell at the mouth of the lot. So much for the intelligent, road-sensing air suspension doing its job. Maybe just coincidence? Another issue popped up after about 20 minutes, the alert to charge the 12V battery. I have my fingers crossed that this is the source of the problem.

Has anyone experienced anything like this with their EQS? A google search doesn't lead to any real hits related to Mercedes.
When did you get your EQS? There was a recall a few months ago that affected the first 1700 cars in production that required a software update at the dealer for this very issue. My car was also bricked early on (maybe in January 2022) with a system malfunction, but fixed itself after an hour. At the time the dealer could not replicate the issue, but turns out there was an issue with the software of some of the first cars built that they have since rectified.

Unfortunately, it was not fixable via over the air update but required a visit to the dealer.
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Old Oct 27, 2022 | 01:59 AM
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EQS 450+
Originally Posted by addio06
When did you get your EQS? There was a recall a few months ago that affected the first 1700 cars in production that required a software update at the dealer for this very issue. My car was also bricked early on (maybe in January 2022) with a system malfunction, but fixed itself after an hour. At the time the dealer could not replicate the issue, but turns out there was an issue with the software of some of the first cars built that they have since rectified.

Unfortunately, it was not fixable via over the air update but required a visit to the dealer.
I got mine early February - while you could still get the Hyperscreen on the 450+. I finally received some word from the dealership and it's not looking good. The 12V is entirely dead and even after it is jumped the high voltage battery has issues. They are going to try to figure it out. The problem with the EQS is that there are so few trained repair techs.

The car was just at the dealership for the tow hook recall, they were supposed to look for other recalls at the time, too. I will bring this up. Do you happen to have a recall notice I can refer to?
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Old Oct 27, 2022 | 03:14 AM
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Originally Posted by SirNH
I got mine early February - while you could still get the Hyperscreen on the 450+. I finally received some word from the dealership and it's not looking good. The 12V is entirely dead and even after it is jumped the high voltage battery has issues. They are going to try to figure it out. The problem with the EQS is that there are so few trained repair techs.

The car was just at the dealership for the tow hook recall, they were supposed to look for other recalls at the time, too. I will bring this up. Do you happen to have a recall notice I can refer to?
I posted this to this forum in June when I got the recall but this is the campaign letter I got.
Attached Files
File Type: pdf
2022-06 Recall redacted.pdf (148.4 KB, 196 views)
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Old Oct 27, 2022 | 03:24 AM
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Wow, that reads exactly like my fault! Thanks, addio!
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Old Oct 27, 2022 | 09:55 AM
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Originally Posted by SirNH
Wow, that reads exactly like my fault! Thanks, addio!
Most 450+ woth hyper screen are early build cars with low serial numbers (I’ve seen a few in the 3000s, most in the 1000s) so they should mostly be in that first 1700 cars built group
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Old Oct 27, 2022 | 02:58 PM
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Originally Posted by SirNH
I had a nice, long 4 hour visit to the donut shop yesterday. After returning back to my car with a box of brunch-time donuts, the car refused to turn on, reporting a "Drive system malfunction". I had to wait several hours for Mercedes roadside assistance to find a tow-truck to make matters worse.

The car was working fine when I parked. However, just as I entered the parking lot, the car did bottom out on a swell at the mouth of the lot. So much for the intelligent, road-sensing air suspension doing its job. Maybe just coincidence? Another issue popped up after about 20 minutes, the alert to charge the 12V battery. I have my fingers crossed that this is the source of the problem.

Has anyone experienced anything like this with their EQS? A google search doesn't lead to any real hits related to Mercedes.
If you have the system german the message reads as follows "DAS AUTO IST KAPUT"
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Old Oct 27, 2022 | 07:41 PM
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Originally Posted by BenjaminKohl
Most 450+ woth hyper screen are early build cars with low serial numbers (I’ve seen a few in the 3000s, most in the 1000s) so they should mostly be in that first 1700 cars built group
They got my car to finally power on again, but they need to replace the 12V battery - it's entirely dead, and after that, they have to see which codes still remain. It's throwing error codes all over the place, I guess.

Talking to the service rep, it sounds like they applied that recall patch the other week when it was in for the tow hook recall, so maybe it's the firmware patch that caused it. But one of the other thoughts we are exploring is if my aftermarket dashcam or mobile hotspot drained the battery too much. I am doubtful it's the aftermarket devices, because I would have expected the 12V warning when I first got in the car that day, not after 20 minutes of driving and parking for 5 minutes. If anything, if there were a drain, the driving should have recharged at least partially.

One thing to complain about compared to Tesla, at least my dealership, if they are out of loaners, you have to find your own transportation while the car is in the shop. Tesla would pay to put you in a rental if they were out of loaners.
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Old Oct 27, 2022 | 08:34 PM
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@SirNH, I don't know when you last had a Tesla but they no longer provide loaners at most of their service centers. They will offer you a Uber ride home.
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Old Oct 27, 2022 | 08:43 PM
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Originally Posted by buddy4406
@SirNH, I don't know when you last had a Tesla but they no longer provide loaners at most of their service centers. They will offer you a Uber ride home.
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Old Oct 27, 2022 | 09:11 PM
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Originally Posted by buddy4406
@SirNH, I don't know when you last had a Tesla but they no longer provide loaners at most of their service centers. They will offer you a Uber ride home.
I was on my third until February of this year, when Tesla bought it back because it was a lemon. I was in a loaner for over 2 months last winter BUT, it was also a brand new Model S - maybe because it was new, maybe because it was a Model S? But I was always put into a loaner or rental if the vehicle was going to be there overnight or longer.

Mercedes will put me into a loaner as long as I can make an appointment far enough in advance for them to schedule a loaner - I won't fault them for that, it's just that usually means scheduling service a couple of weeks in advance.
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Old Oct 28, 2022 | 01:11 PM
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My dealer has an Avis or Hertz rental desk in the dealership. The dealer pays for a rental if they are out of all 75 loaners.
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Old Nov 3, 2022 | 01:14 AM
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Originally Posted by ua549
My dealer has an Avis or Hertz rental desk in the dealership. The dealer pays for a rental if they are out of all 75 loaners.
I was lucky enough to get into a loaner on Monday... I am unlucky enough that I may be without a car for quite some time. They have no idea what is wrong and they are slowly working with the technicians in Germany to diagnose the issue - which is very slow when they work 8 hours apart from each other. It took them a while just to get the car booted to the point where they could read the status codes, of which there are many, I guess.

I totally missed out on the Halloween easter egg!

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Old Nov 14, 2022 | 04:53 AM
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3 weeks down... still no resolution even with the assistance of the engineers back in Germany. They ruled out damage caused by the car bottoming out. They are almost at the point where they are ready to order a new battery.

My service rep at the dealership has been really great, and so I want to allow them time to try this - even if it will take time to ship a battery from Germany. If that doesn't work, I am afraid I will have to claim a lemon - which really sucks. Tesla bought back my 2021 Model S earlier this year due to unsolvable electrical issues, too.
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Old Nov 14, 2022 | 07:09 AM
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Originally Posted by SirNH
They got my car to finally power on again, but they need to replace the 12V battery
Though not quite the same beast, the Prius Hybrid suffers the same threat from the 12V battery. If it goes flat, the car will not Power ON. Since the 12V in Hybrid/EV does not have to crank an ICE as in other cars, manufacturers put in low capacity 12V batteries, just enough to power up some electronics and bring the big battery online.

After being stranded by a flat 12V in my Prius, I learned of this NOCO backup battery and it has already saved me one additional time. After a simple hookup to the 12V in the car, I was back on the road in a matter of seconds.

I know for sure you never want to use traditional jumper cables to revive a Hybrid/EV from another conventional vehicle. But these backup packs are super safe and won't allow reversed connections or other anomalies to fry your electronics.

Last edited by SilberGrau57; Nov 14, 2022 at 07:29 AM.
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Old Nov 14, 2022 | 08:43 AM
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Originally Posted by SirNH
3 weeks down... still no resolution even with the assistance of the engineers back in Germany. They ruled out damage caused by the car bottoming out. They are almost at the point where they are ready to order a new battery.

My service rep at the dealership has been really great, and so I want to allow them time to try this - even if it will take time to ship a battery from Germany. If that doesn't work, I am afraid I will have to claim a lemon - which really sucks. Tesla bought back my 2021 Model S earlier this year due to unsolvable electrical issues, too.
why would they have to ship a battery from Germany, when there are thousands in the US?! The EQS SUV, is made in the US and uses the same battery!
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Old Nov 14, 2022 | 02:56 PM
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Pardon my ignorance but what’s the difference between the 450 and 450+?
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Old Nov 14, 2022 | 05:51 PM
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Originally Posted by AppleFan1
Pardon my ignorance but what’s the difference between the 450 and 450+?
there are no plain 450 in US. It has a smaller battery.
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Old Nov 14, 2022 | 06:23 PM
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I think for 2023 there is a 450+ (RWD) and a 450 4Matic (AWD).
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