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Stupid question but relevant. Where is the 12v battery located? I had a 12v battery warning when my EQS 580 was at the detailers getting paint protection film installed. They had the doors open for two days. When I called them in a panic they told me they had a compatible charger in the shop and would take care of it. I'd still like to know how to charge.
EG2
It's under the hood. Haven't accessed it myself, but others on the forum have. There are also the standard Mercedes posts for jump starting present under the hood.
PFL205.064 with M276.823 (Oil pump solenoid defeated)
Originally Posted by Cincy2
Stupid question but relevant. Where is the 12v battery located? I had a 12v battery warning when my EQS 580 was at the detailers getting paint protection film installed. They had the doors open for two days. When I called them in a panic they told me they had a compatible charger in the shop and would take care of it. I'd still like to know how to charge.
Hi all - thanks for the great info on the battery- I have a Jan 2022 production unit. Have not experienced the 12v battery issue yet but just wondering if it has anything to do with the max charge level of the HV battery. When you experienced the 12v failure, had you been charging the HV battery to the recommended 80% max or 100% max?
It looks like all the scenarios were below 80%, but should not have been classified as "critical" - mine was at 38%, and was find until I used the ChargePoint charger for 30 minutes, then disconnected it and could no longer start the car - with errors showing battery malfunction.
That's exactly what I would do. I'm considering purchasing one of those portable jump starters to have, just in case. In my understanding of this issue, if you can jump start the 12v battery and get the car to turn on, it will then charge the 12 v battery. I'd urge the dealer to do just that. I guess my main question is, how did it drain in the first place?
@hlothery Can you send a link to a recommended portable EV jump starter if you find one, please?
Status update @atlnguy et al, I just escalated to all the channels possible, and got an answer from the service manager - this is a KNOWN ISSUE, and a Service Campaign just came out about this. Right now, the fix is available via a software update at the service department (not sure if it will be an automatic over-the-air update, but definitely hope so).
The manager said he's not aware that EVs could get a jump start at all, but the way this shook out, it's kind of a good thing that the car was bricked right at the dealership charger, which wasn't a good look.
The technicians applied the update and all the critical battery alerts have disappeared on their end, and on the Mercedes Connect app.
EDIT: The name of the software update is Powertrain Control Unit Software Update. It was launched 4/8/22, and can only be performed by the dealer at this time.
Last edited by eqsnoob; 04-11-2022 at 01:27 PM.
Reason: adding the name of the update
I was really hoping that Mercedes would adopt Tesla’s approach of not having to go to the dealer for software upgrades as MBUX certainly supports it but that doesn’t seem to be the case.
EDIT: The name of the software update is Powertrain Control Unit Software Update. It was launched 4/8/22, and can only be performed by the dealer at this time.
Thanks for this update. My dealer is aware, and my update is scheduled for Friday. Do you have any idea how long the update took?
You guys should ask your service guy how much is the cost to replace the main battery (parts and labour). Be ready to pick up your jaw on the floor when you hear it.
You guys should ask your service guy how much is the cost to replace the main battery (parts and labour). Be ready to pick up your jaw on the floor when you hear it.
I was told by a service manager $30-40k before taxes. Imagine after 10 years of owning the vehicle and the value of the vehicle is less than $25k and you have to replace the battery they tell you the price of battery replacement makes the current S-class with ICE very favorable to own in the long run.
The update to the PTCU software was done this morning on my car. It took about an hour. The documentation says 3643 Campaign No 2022030031. Hope this helps you guys get the update done, and I hope this solves any 12V issues ya'll are having. I was having none, but got the software update done anyway.
UPDATE:
On a positive note, Mercedes Premier support has been very proactive in trying to respond and following up with me.
Any more problems?
Also, I'm a newbie for this EQS stuff, so please disregard my ignorance here, but is there a MB "Premier support" that I need to sign up with , or are you just being complimentary?
Any more problems?
Also, I'm a newbie for this EQS stuff, so please disregard my ignorance here, but is there a MB "Premier support" that I need to sign up with , or are you just being complimentary?
No. The US EQS calls through the telematics get routes to the same line as Maybach calls.
Hi all - thanks for the great info on the battery- I have a Jan 2022 production unit. Have not experienced the 12v battery issue yet but just wondering if it has anything to do with the max charge level of the HV battery. When you experienced the 12v failure, had you been charging the HV battery to the recommended 80% max or 100% max?
My MB dealership technician set the charge on my EQS 450+ to 90% from 80%, and updated all vehicle software. Since then, no more 12v battery and door unlocking issues.
Hey guys or ladies, have you had this issue, Mbux shutting down. I traveled to Houston Texas this past Monday and my EQS shut down in the middle of a heavy traffic intersection, but my driver display stayed on. Right after, my driver display displayed a bunch of malfunctions popups, counted 12 popups. Turn car off, open the door, turn car on, nothing. The EQS became a basic vehicle just drive and signals, I was able to drive the car to nearest EA charging station and charge it for 40 minutes and the Mbux came back up. I called my service advisor at MB and told them my situation all they could tell me to bring it in. Mind boggling. Today they replace a bunch of sensors and updated the Mbux. But they did tell me that there were no codes for the MBux. I showed them the pictures that I took but couldn't respond. I asked for them to please replace my EQS since i been having issues from delivery day. Offline, one of the consultants told me that it could be that EQS might be overcharging creating a high voltage surge. But this is not a diagnose, so I take it as a grain of salt (no value).
Weather: roads were wet but not raining
Temperature: 68 degrees clear skies
Charge state: 25%
Manufacture date is Jan 2022 deliver on March 22, 2022 and Issues started day one with Ambien Light
History:
I have been complaining to service department about sensors/radar issues didn't work properly, USB C charging not working and lights around USB port not working, Parktronics not working and Mbux acting erratic. Don't get me wrong my MB service department has been taking care of me very well. It's just one those cars that have gremlins. I still like EQS better than others manufactures.
Update! After research at the NHTSA I found this which is similar to my issue. Not for EQS but for other models with MBux.
Last edited by Lawen4ment; 05-01-2022 at 01:51 AM.
Update, apparently the MBux turning black screen is a common issue. But for the EQS is bad news because MBux is the command center. MB service did something that it seems to be working ok. Haven’t had any issues since last week. I’m taking another trip and I’ll see if it work.
I took delivery of a 450+ last Friday. Tonight with 142 miles on the odometer and 50% state of charge, I plugged in my Chargepoint flex level 2 home charger. The system was set to charge to 80%. Plugged it in and it charged at about 9.7/9.8 kwh for about an hour and 15 minutes. At that point, I received a notice on my phone that the charging had failed. When I get in the car it says battery malfunction. Multiple system failures. " car can not be towed" . I have called Mercedes me twice. It has taken them 40 minutes to even begin dispatching a truck and then two hours before arrival. They aren't sure whether there will be a loaner either. Not off to a great start on any front here. Very first charge. Bricked!!
leave the car locked and all doors closed for 10 minutes and come back. And it should work
car needs to reset because for some reason it doesn’t know that the charger is a charger
Seeing these battery issues has me thinking how the wife will respond if a brand new EQS is bricked for any battery reason......and if it happens while driving...oh boy. This EQS proponent will never hear the end of it! I think this year it will be a good idea to let her choose the car (it will another ICE S Class). Give MB 3-4 years to minimize these types of occurrences.
Seeing these battery issues has me thinking how the wife will respond if a brand new EQS is bricked for any battery reason......and if it happens while driving...oh boy. This EQS proponent will never hear the end of it! I think this year it will be a good idea to let her choose the car (it will another ICE S Class). Give MB 3-4 years to minimize these types of occurrences.
As far as I know bricking has been extraordinarily rare. Most, if not all, of the 12V systems problems have been from ignorance like keeping the lights on for hours on end with the ignition off. HINT If you are going to be using the 12V system for many hours turn the car on, in neutral with the parking brake engaged. That way the main battery keeps the 12V charged! Almost no one knew that idiosycracy but thanks to these forums it has been figured out. In summary there is no reason to avoid the EQS for any possible battery "problem".They are very, very rare. More common have been issues with MBux going batty but those usually fix themselves with a restart after a few minutes or overnight. In general aside from some teething issues the cars have been very very reliable. The majority of problems have been the usual annoyances with any car with a myriad of doodads, a light that pops up when it shouldnt, clunky door handles, difficulty with charging stations and so on.
The big question is if you are buying a fully baked product or some science experiment that your worried if its going to leave you stranded or blow up. The resounding answer is that the EQS seems to be better put together than pretty much any other EV or ICE car in the fist year of production on the market.
Last edited by c4004matic; 09-28-2022 at 09:15 PM.
2023 Urus Performante - 2021 Ferrari Roma - 2017 Ferrari 488 GTB - 2022 GLE 63 S Coupe
Originally Posted by jplr0228
Seeing these battery issues has me thinking how the wife will respond if a brand new EQS is bricked for any battery reason......and if it happens while driving...oh boy. This EQS proponent will never hear the end of it! I think this year it will be a good idea to let her choose the car (it will another ICE S Class). Give MB 3-4 years to minimize these types of occurrences.
Exactly. Sorry to hear about these issues but I'm not surprised. I would never buy one of these on a first year run. Too many issues such at this are bound to happen and I won't be the guinea pig. Later down the road perhaps once a track record of reliability has been established. Love my 2022 GLE 63S Coupe for now.
Exactly. Sorry to hear about these issues but I'm not surprised. I would never buy one of these on a first year run. Too many issues such at this are bound to happen and I won't be the guinea pig. Later down the road perhaps once a track record of reliability has been established. Love my 2022 GLE 63S Coupe for now.
Bogus concern, its like saynig that you would pass on an AMG because somewhere someone had their new engine blew up or caught fire , which is known to have happened more than once with the 8 cylinder 4.0 liter hybrid.in all new AMG cars.. There have been virtually none bricking issues with the EQS. In fact MB has been very proactive with recalls on the vehicle.
Exactly. Sorry to hear about these issues but I'm not surprised. I would never buy one of these on a first year run. Too many issues such at this are bound to happen and I won't be the guinea pig. Later down the road perhaps once a track record of reliability has been established. Love my 2022 GLE 63S Coupe for now.
Same story with the 167. Mega-flop on the 48V system introduction and unknown reliability on the four banger which is descended from an engine with a known problem for cracking pistons.
I am a 167 buyer if the 48V system is discontinued, but I don't think that will happen.
First year or two of a new MB product = strong "do not buy" rating.
04-11-2022, 09:31 AM
Resolution Update 4/11/22
