CLS Coupe (C257) Discuss the CLS Coupe

48 volt battery problem

Old Aug 26, 2021 | 01:06 PM
  #76  
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Originally Posted by Longroof45
Thanks. You're a great source of information and that is good advice. While I'm skeptical that MB would jump at the chance to install yet a fourth 48v battery in my four-month old E450 wagon absent an official recall, it certainly doesn't hurt to ask. So far so good with battery #3, but I still have real trust issues when it comes to taking it on a 2,400 mile trip in the dead of winter with my wife and dog in tow.
No problem : ) I don't work for Mercedes but I know a few friends that do and other friends that own Mercedes and AMG vehicles from many different classes of MB's lineup. So we are all car enthusiasts and I am passionate about Mercedes the brand itself. I like to learn about things that has to do with this brand and share such information with others in hopes of helping them out. I am happy that this forum exists and that lots of enthusiasts and engineers here are willing to help people out. I learned a lot here too as a member which I am grateful for.

I am grateful for the help I received as well as most of the time, the enthusiasts and engineers on the forums know our cars much better than the technicians at the dealership. Forum members too have greater awareness of service bulletins/Xentry Tips that help solve issues my car had. Without this information, the technicians will spend hours to identify an issue and if they give up because they couldn't find it, they will say it is normal. So I want to say thank you as well for those who are actively helping others on the forum.

I am glad you found the information I provided you helpful. Honestly, I would ask your dealership anyways but I also want you to not worry too much about it, don't let it stress you too much. After all, you paid all this money to get this car as a reward for your hard work, you should enjoy it instead of worrying about what might break after. I have a friend (on this forum) that had a problematic car which when he got rid of it, I was in full relief and I congratulated him now that he no longer has to deal with it.

Good luck with your car and please do enjoy your trip!
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Old Sep 7, 2021 | 02:13 AM
  #77  
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Looks like this problem hasn't been resolved in the w223. My car starts and runs after sitting for several minutes but dies after a few seconds. Getting it towed in the morning.
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Old Sep 7, 2021 | 08:18 AM
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Originally Posted by ColeBlooded
Looks like this problem hasn't been resolved in the w223. My car starts and runs after sitting for several minutes but dies after a few seconds. Getting it towed in the morning.
Very disappointed to hear, this problem started I don't know, late 2019? or early 2020 for MY20 (and possibly even MY19 GLE?) and yet today owners are still having this issue.
I wish you good luck in getting this fixed as soon as possible so you can enjoy your vehicle.
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Old Sep 7, 2021 | 08:18 AM
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Originally Posted by Robert Junior
My dealer won’t just replace the battery. They said it’s much more involved to fix the problem.
It’s now been 15 days they’ve had my car.
Does Mercedes ever buy back cars? I got the car in Oct 2018 (2019 model year). Only has 20,000 miles.
Yes, the precedent for MB to buy back vehicles exists. The search function on this site will bring up examples.

Sorry to hear MB hasn’t gotten their act together yet for the W223 launch.

Last edited by chassis; Sep 7, 2021 at 10:07 AM.
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Old Sep 7, 2021 | 09:29 AM
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Originally Posted by ColeBlooded
Looks like this problem hasn't been resolved in the w223. My car starts and runs after sitting for several minutes but dies after a few seconds. Getting it towed in the morning.
So sorry to hear this. Your symptoms sound a little different from many one this thread in that you have been able to actually start your car. Did you receive any alerts about the 48v or 12v battery?
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Old Sep 7, 2021 | 09:31 AM
  #81  
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Edit - Sorry, "different from many on this thread".
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Old Sep 7, 2021 | 10:17 AM
  #82  
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Originally Posted by Longroof45
So sorry to hear this. Your symptoms sound a little different from many one this thread in that you have been able to actually start your car. Did you receive any alerts about the 48v or 12v battery?
No alerts. App says battery is "partially charged". Currently waiting on a tow as a type.
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Old Sep 7, 2021 | 10:44 AM
  #83  
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Well my E200 Coupe Facelift MY 2020 broke down in february after 2 days of delivery with only 4 miles on it. I literally didnt even get to drive it at all and it's been sitting in the dealer since. Every time they push back the date of receiving the new 48V battery and the latest date is for the 15th of october and they are saying it could still be pushed back for a 4th time ....
Last time I will buy a mercedes for sure.
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Old Sep 7, 2021 | 10:56 AM
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Originally Posted by Neapolis
Well my E200 Coupe Facelift MY 2020 broke down in february after 2 days of delivery with only 4 miles on it. I literally didnt even get to drive it at all and it's been sitting in the dealer since. Every time they push back the date of receiving the new 48V battery and the latest date is for the 15th of october and they are saying it could still be pushed back for a 4th time ....
Last time I will buy a mercedes for sure.
I wouldn't go as far as not buying a Mercedes but at least wait till they solve the 48V battery issues. Anyways, good luck and hopefully things turns out in your favour.

Last edited by W205C43PFL; Sep 7, 2021 at 12:59 PM.
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Old Sep 7, 2021 | 11:49 AM
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Originally Posted by Neapolis
Well my E200 Coupe Facelift MY 2020 broke down in february after 2 days of delivery with only 4 miles on it. I literally didnt even get to drive it at all and it's been sitting in the dealer since. Every time they push back the date of receiving the new 48V battery and the latest date is for the 15th of october and they are saying it could still be pushed back for a 4th time ....
Last time I will buy a mercedes for sure.
That's crazy. I had my replacement batteries within a week. Where are you located?
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Old Sep 7, 2021 | 12:48 PM
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Old Sep 7, 2021 | 12:52 PM
  #87  
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Originally Posted by ColeBlooded


Sigh. Hopefully the car realizes where is the real home (your driveway) soon.
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Old Sep 7, 2021 | 12:56 PM
  #88  
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Painful to look at.
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Old Sep 7, 2021 | 01:00 PM
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I'm just now getting the battery critical message after the car was towed lol
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Old Sep 7, 2021 | 01:10 PM
  #90  
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Originally Posted by ColeBlooded
I'm just now getting the battery critical message after the car was towed lol
Forgot to ask, when the engine turned off automatically after starting for a few seconds could it be because the 12V battery was discharged too much to convert voltage to charge the 48V battery. Question is did you try jump starting the 12V battery?
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Old Sep 7, 2021 | 01:11 PM
  #91  
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Originally Posted by Longroof45
Painful to look at.
On the positive side, I hope you enjoyed that trip that you planned and had zero issues.

Last edited by W205C43PFL; Sep 7, 2021 at 01:14 PM.
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Old Sep 7, 2021 | 01:19 PM
  #92  
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Originally Posted by W205C43PFL
Forgot to ask, when the engine turned off automatically after starting for a few seconds could it be because the 12V battery was discharged too much to convert voltage to charge the 48V battery. Question is did you try jump starting the 12V battery?
Good question. I didn't try to jump it. There's a shelf above my hood so i would've had to push it out the garage in order to open the hood. A big hassle with no help lol
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Old Sep 7, 2021 | 01:20 PM
  #93  
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Originally Posted by ColeBlooded
Good question. I didn't try to jump it. There's a shelf above my hood so i would've had to push it out the garage in order to open the hood. A big hassle with no help lol
I see. I guess the decision of letting the tow truck guy do it was wise. But..... how come the tow truck driver didn't try jump starting either?
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Old Sep 7, 2021 | 02:23 PM
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Originally Posted by W205C43PFL
On the positive side, I hope you enjoyed that trip that you planned and had zero issues.
Thanks for asking. I haven't take the trip yet but I'm now over 2,300 miles and everything is still looking good. I know I'm not necessarily out of the woods but I'm breathing a little easier.
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Old Sep 7, 2021 | 03:24 PM
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Originally Posted by Longroof45
Thanks for asking. I haven't take the trip yet but I'm now over 2,300 miles and everything is still looking good. I know I'm not necessarily out of the woods but I'm breathing a little easier.
Yup, everything should be alright.
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Old Sep 7, 2021 | 05:18 PM
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So i called service department to tell them the car was enroute. They say there's no need. An advisor will call me when they find out something. I call the dealer 3 times and they don't know where the car is and it's not in the tow log. I keep getting the, we'll call you back when we find out what's going on".
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Old Sep 7, 2021 | 06:30 PM
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Originally Posted by ColeBlooded
So i called service department to tell them the car was enroute. They say there's no need. An advisor will call me when they find out something. I call the dealer 3 times and they don't know where the car is and it's not in the tow log. I keep getting the, we'll call you back when we find out what's going on".
Sigh....
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Old Sep 7, 2021 | 06:42 PM
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Well put . . . sigh.
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Old Sep 7, 2021 | 06:55 PM
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Originally Posted by ColeBlooded
So i called service department to tell them the car was enroute. They say there's no need. An advisor will call me when they find out something. I call the dealer 3 times and they don't know where the car is and it's not in the tow log. I keep getting the, we'll call you back when we find out what's going on".
Forgot to ask, did you check Mercedes Me and see if you can locate the car on your phone or is the 12V battery depleted and not even connecting to MB's servers anymore?
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Old Sep 7, 2021 | 07:00 PM
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Originally Posted by W205C43PFL
Forgot to ask, did you check Mercedes Me and see if you can locate the car on your phone or is the 12V battery depleted and not even connecting to MB's servers anymore?
Yea i saw it was there so kinda stupid they couldn't find it. They finally got eyes on my car after 5 hours. Said they've been backed up. They will update me by tomorrow evening about the diagnosis.
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