48 volt battery problem
Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
Have you had a previous battery replacement, or just the one you're presently running on? I'm asking because I'm also running on a replacement 48v for just about a month now myself, without problem. I haven't seen any posts by anyone who's new replacement battery also failed, and I'm hoping that's a good sign.
Junior Member
Joined: Nov 2019
Posts: 54
Likes: 7
GLS
Same issue with 2020 450 GLS
Mine was at the dealer for 15days and all they did was remove the paint from the terminals!
mercedes did not even want to do that. They said they were told to clear the codes and try to replicate the problem and give it back to the owner to see if it happens again. I refused it! So. they were forced to something and did the paint terminals as their fix. I have owned Mercedes over the years and can’t explain them now. My other Mercedes is a s63 cabriolet. They need customer service to become customer service again and so focused on just selling cars!
mercedes did not even want to do that. They said they were told to clear the codes and try to replicate the problem and give it back to the owner to see if it happens again. I refused it! So. they were forced to something and did the paint terminals as their fix. I have owned Mercedes over the years and can’t explain them now. My other Mercedes is a s63 cabriolet. They need customer service to become customer service again and so focused on just selling cars!
Last edited by 9157; Jun 3, 2021 at 08:22 PM.
Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
Another 48V Battery Issue
My brand new (731 miles) All Terrain is sitting in the garage waiting for a flatbed to haul it in, for the second time in its short life. The dealer replaced the dead 48 volt battery at 191 miles, and I'm experiencing the same exact problem that I did then. The dashboard reads "Stop Vehicle - See Operator's Manual", and the MercedesMe app is showing the engine as "on", although it is completely dead other than some auxiliary electrical power, no doubt from the 12 volt battery. I love the car but this is getting old real fast. I know a lot of other people have experienced problems with the 48 volt battery; however, I haven't read any posts about someone having a second brand new battery problem in such a short time. Any ideas?
Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
My brand new (731 miles) All Terrain is sitting in the garage waiting for a flatbed to haul it in, for the second time in its short life. The dealer replaced the dead 48 volt battery at 191 miles, and I'm experiencing the same exact problem that I did then. The dashboard reads "Stop Vehicle - See Operator's Manual", and the MercedesMe app is showing the engine as "on", although it is completely dead other than some auxiliary electrical power, no doubt from the 12 volt battery. I love the car but this is getting old real fast. I know a lot of other people have experienced problems with the 48 volt battery; however, I haven't read any posts about someone having a second brand new battery problem in such a short time. Any ideas?
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
https://mbworld.org/forums/cls-coupe...ml#post8278527
Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
Thank you, konigstiger. I just printed out the bulletin you had posted earlier. No discussions so far. Still waiting for Roadside to come out to take the car in. They promised they would get on it first thing Monday morning.
Junior Member
Joined: Nov 2019
Posts: 54
Likes: 7
GLS
2020 GLS 48v malfunction
My dealer has this bulletin and opened a file with Mercedes. Mercedes Corp said to clear all codes and try and replicate the problem. Dealership had it 2 weeks and no codes. Mercedes said to give the vehicle back to the customer and see if it happens again! I refused to take it back and Mercedes said to sand the terminals; I questioned how this be the cause as the car has almost 24k miles! Dealer is between a rock and a hard place. They agreed with me, but Mercedes won’t authorize any more repairs until it happens again!
we love the car but our confidence with MB is in question. I can’t believe their lack of concern!
I am a long time customer and also have a S63 cabriolet. MB’s response make no sense. The dealer thinks MB doesn’t have a fix for this issue as it is across multiple product lines with this drive train.
we love the car but our confidence with MB is in question. I can’t believe their lack of concern!
I am a long time customer and also have a S63 cabriolet. MB’s response make no sense. The dealer thinks MB doesn’t have a fix for this issue as it is across multiple product lines with this drive train.
Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
That is really bad news. I'm about to take a 300 mile round trip and I shudder to think of this happening in the middle of nowhere. So far, both failures have occurred at my home. While that's certainly aggravating, at least we've been in safe harbor when it's occurred.
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Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
My question is has anyone else who's experienced an inability to start in one of the mild hybrids had a successful resolution from MB? Replacing the 48V battery did not solve my problem apparently.
Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
1. I've never had a problem while driving. In each case, my 2021 All Terrain just refused to start after being idle for a short period of time (3 hours the first time and overnight the second time.)
2. I have never received a "48 volt battery malfunction" message, even though after my fist engine failure, the dealer did in fact REPLACE the 48 volt battery." In both cases, however, I received the following message: "Stop Vehicle See Operator's Manual". Also, in the first case, my MercedesMe app showed "12 volt battery critical". In the latter case, MercedesMe showed "12 volt battery low". Also, iin the latter case I received a dashboard massage "12 V Battery See Operator's Manual". However, when Roadside tested the 12 volt battery, he said it was normal. Also, I have been monitoring the 12 volt battery regularly, and it was above 14 while driving, as the Roadside tech said it should be, even just before the last engine failure. So I am getting 13 volt battery messages even though the problem has apparently not been the 12 volt battery.
So the car has gone to the dealer on a flatbed twice in the first 731 miles (the first 4+ weeks) that I have owned it. The tech will do diagnostics tomorrow and I am really curious on what will turn up.
So the car has gone to the dealer on a flatbed twice in the first 731 miles (the first 4+ weeks) that I have owned it. The tech will do diagnostics tomorrow and I am really curious on what will turn up.
Junior Member
Joined: Nov 2019
Posts: 54
Likes: 7
GLS
Called MBUSA
I called MBUSA after receiving a survey on my last service.
They escalated my case for buy back review.
I told them all I want to to be assured they have a fix and they said this is all they could offer.
Maybe if enough of us do this it will result in a fix!
They escalated my case for buy back review.
I told them all I want to to be assured they have a fix and they said this is all they could offer.
Maybe if enough of us do this it will result in a fix!
Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
Bad 48V Battery Karma
I had been thinking that my problem is identical to all of those described in this thread; however, after reading the posts again, my situation is a little different:
1. I've never had a problem while driving. In each case, my 2021 All Terrain just refused to start after being idle for a short period of time (3 hours the first time and overnight the second time.)
1. I've never had a problem while driving. In each case, my 2021 All Terrain just refused to start after being idle for a short period of time (3 hours the first time and overnight the second time.)
2. I have never received a "48 volt battery malfunction" message, even though after my fist engine failure, the dealer did in fact REPLACE the 48 volt battery." In both cases, however, I received the following message: "Stop Vehicle See Operator's Manual". Also, in the first case, my MercedesMe app showed "12 volt battery critical". In the latter case, MercedesMe showed "12 volt battery low". Also, iin the latter case I received a dashboard massage "12 V Battery See Operator's Manual". However, when Roadside tested the 12 volt battery, he said it was normal. Also, I have been monitoring the 12 volt battery regularly, and it was above 14 while driving, as the Roadside tech said it should be, even just before the last engine failure. So I am getting 13 volt battery messages even though the problem has apparently not been the 12 volt battery.
So the car has gone to the dealer on a flatbed twice in the first 731 miles (the first 4+ weeks) that I have owned it. The tech will do diagnostics tomorrow and I am really curious on what will turn up.
So the car has gone to the dealer on a flatbed twice in the first 731 miles (the first 4+ weeks) that I have owned it. The tech will do diagnostics tomorrow and I am really curious on what will turn up.
While I'm beginning to think my 2021 All Terrain has a cloud over its head, I really do appreciate the fact that my dealer has been forthcoming about the problem, as others on this site have written that their dealers have tried all kinds of "fixes" before finally agreeing to replace the 48V battery. That may simply because MBUSA doesn't want to readily replace these them (I'm told they cost a few thousand dollars). Anyway, I'm hoping my dealer can find Battery #3 quickly, as I know that hasn't always been the car with some others who've posted on the subject, and I'm praying it is more reliable than the previous two. Any help here would be appreciated. Thanks!
Newbie
Joined: Jun 2021
Posts: 1
Likes: 0
2021 GLE 450
I am the new entrant to the 48V bad battery batch. Got the 2021 GLE450 last November (custom order) and got towed to the dealer yesterday and was told the 48V is dead. I sure hope this is not a recurring problem with this battery.
Newbie
Joined: Jun 2021
Posts: 4
Likes: 0
2020 CLS450
Last night while I was stopped to make a left turn in traffic, a message came up saying something about the the 48 volt battery. The car simultaneously shut off, and I couldn't restart it for about 20 secs. Then, the message disappeared and it started and has worked fine since. I just dropped it off at the dealer. Has anyone had a similar problem?
Newbie
Joined: Feb 2007
Posts: 2
Likes: 0
Same problem with my 2 month old CLS53. Car was in my garage and couldn't start and had to be towed to dealership. This was two weeks ago. Dealer tells me they are still waiting for parts. This is worrisome. btw I am in BC, Canada. Anyone in Canada with same problem?
Newbie
Joined: Jun 2021
Posts: 4
Likes: 0
2020 CLS450
48 volt issue
13 vehicles here in Las Vegas with that issue over a year old and no attempt to fix the vehicles. Note the attached service record and email.
Senior Member
Joined: May 2021
Posts: 338
Likes: 101
From: Shaker Heights, Ohio
2021 E450 All Terrain Wagon
Welcome to the club you don't want to belong to. If you go to post #40, you'll see that I'm now on my third 48 volt battery and the car barely has 1,100 miles on it. What I've learned from posts on this site and from some other research is that there's been a bad batch of 48 volt batteries coming out of Germany. I believe the part number for the problematic battery is Part No. 000-982-68-1 and, while I believe Mercedes has discontinued it, they are still supplying it to the dealers in the U.S. anyway. When my car was at the dealer after it wouldn't start the last time, I alerted them to the issue in hopes that they could make sure that my next battery was from a different batch, but they told me that I wold be getting whatever Mercedes sent them. So, once again, my car is running on Part No. 000-982-68-14, and my fingers and toes are crossed that this one won't be one of the bad ones.
Newbie
Joined: Jun 2021
Posts: 4
Likes: 3
2021 CLS 53
Finally got new battery installed today for my 2021 CLS53 that died in 2 weeks after delivery, been waiting about 2 months for new battery due to backorder. Will pickup tomorrow when ready and we'll see how it goes...
Newbie
Joined: Jun 2021
Posts: 4
Likes: 3
2021 CLS 53
I'm in Alberta.
