Has anyone had any 48 volt battery issues on the 2023 MY C43 Sedans?

A little backstory I was driving my car and then the battery light came on then a minute later the check engine light came on and told me to stop immediately. Subsequently, my dash became a Christmas tree and all the lights came on indicating things being disabled, ie traction control, steering assist, forward collision, etc. I was like wow this is pretty exciting for just a low battery. I know Mercedeses trip out when the battery fails and you get a check engine light as it happened on my last 43, but the Christmas tree was unexpected and uncalled for lol. Anyway, nbd because it's just a battery right? WRONG. Got it towed to the dealer and they finally told me that it isn't the battery specifically. I am for some reason "very intermittently" not getting voltage.

Is this a consistent problem with the 23 model? If so, what is the common issue / solution? If not, I know it could be anything, but what do you think is likely the problem?

This car is so garbage, my god...I compromised to get this car and now this comprimisation (not a word) was not even worth it. Downgraded from a V6 (my 19 C43 Coupe) to a 4 hybrid, and downgraded from a coupe to a sedan (now I feel like an Uber driver). That being said, I love the interior even though some people call it cheap. I don't think its cheap. I love the intelligent light system or whatever its called. The gimmicky picture when locking/unloocking/ and starting up is cool and the lights turning in the direction you turn is cool. The 20" wheels are really nice too.

One major positive though is I have had 0 tire / rim problems in 8 months of ownership. Knock on wood. My 2019 I went through about 12 tires and 1 rim...all without the wheel and tire warranty. Boy have learned my lesson...

Other issues I've had, the infotainment system crashing, freezing, resetting randomly. I know many others had that issue too, but this is still trash. Finally after 3 trips (I think) to the dealer it has been running proper since November. And the other issue I had was the AC control panel on the back had a click and didn't feel natural when pressing on it. They replaced that and it doesn't seem fixed. I'm not going to try to get that fixed at this point, whoever rides with me can suffer lol. I just want to have my car. I don't care if its under warranty and free to fix. For 1 my service center sucks and never have loaners, 2 if i get a loaner it is an even more garbage car, 3 I am paying for a car that I am not driving. Insane. The moment it falls in to lemon law criteria, sayonara! I'll get the 1st year model run of the CLE to suffer with all the 1st year problems it has haaaaaaaaaaaaaaaaaaaaaaaaa.


TLDR: I have a 48 voltage battery issue on my 2023 MY C43 Sedan, it is not the battery itself, what could the problem be? This car is a POS.

 

Lemons will happen mate.

my 2023 hasn't had any issues as I'm approaching 10k miles.

 

Might be related to recent recall:

 

Does anybody got such a note from the service to take the car back for such replacement?

 

I Have a 2024 c43 and all the lights lite up like you stated. Getting text from my app that battery is low. Mb stated from what they know it is the cable was twisted from factory. They replace the cable and sensor. I believe it’s still happening . Battery low again. Something is draining it. Have to bring it back. Any suggestions.

 

I’ve just got my car back from the dealer for this exact issue. There isn’t an issue with the 48v battery. The problem is software. The fixes have been written and are currently nearing the end of testing. My dealer’s workshop manager made some calls and managed to get MB to release it early to him before it’s live. He said to expect a recall soon. They are for pretty much every electrical system on the car.

 

Yeah but the only problem with lemon law is it’s very protecting of the dealers/manufacturers in the fact that you have to go to major extremes for it to be a lemon. For example: be at the dealer for 60 days (or however many days it is) for the SAME issue. If it can be a collective amount of days for multiple different issues it would be much easier to qualify.

Luckily my car has been better since my last visit. Still not perfect but 10x better.

 

I don’t have any suggestions but I’d call around dealers and ask if they’ve experienced this. Of course they will say “we can’t fully diagnose something without you bringing it in” but some dealers may have run into this problem 10s of times and can give you some suggestions on what to tell your dealer.

 

Thank God there will be a recall. My car has been a lot better in recent times but I still have some minor issues. Can’t wait for the recall.

 

[QUOTE=shadi150;9006608]I don’t have any suggestions but I’d call around dealers and ask if they’ve experienced this. Of course they will say “we can’t fully diagnose something without you bringing it in” but some dealers may have run into this problem 10s of times and can give you some suggestions on what to tell your dealer

Thank you . I will give this information to them and I will let you know.

 

My wife's car has had the same issues and more....(We have received multiple battery critical alerts, all of which the dealer stated the battery is fine)

1. Transmission adaptation was accomplished by 2 different dealers, resulting in very little improvement. They both claimed the transmission is working as designed.
2. Had the steering column clunking sound repaired by 2 different dealers, had to recently return for a 3rd attempt.
3. Passenger side airbag warning, required 2 attempts to repair. First attempt dealer spliced a wiring harness and re-routed a wire clamp. Picked up vehicle the following day and the valet driver noticed the airbag light lit (same warning), as a result, I had to leave the car again.
4. 5 days later, stopped at the store. When I attempted to leave, car wouldn't start and the instrument panel lit up light a X-Mas tree. Called for a tow, wife came with the other car key and vehicle started, but a collision warning light was illuminated.
5. Dealer performed a lengthy software update, replaced the steering column linkage, and fixed a ratel in the drivers side door panel. Wife picked up car and noticed the seat memory setting wasn't making the audible completed signal /sound through the stereo, returned back to the service bay to drop if off.
6. Vehicle at the dealer for the weekend, received another battery critical alert from Mercedes me connect.

 

So I found the following out about a week ago after another battery and engine light. Firstly, nothing was wrong with the battery. For the engine light, and I quote "this is a known issue by Mercedes and there is no fix. It is code related and they are working to get it fixed. No estimated timeframe for the fix. Continue to drive your car when you get a check engine light as the light will disappear by itself. Unless you feel something wrong like the car is jerking then continue driving." I paraphrased a little because I can't remember exactly what was said. But some of this verbiage is written on the invoice.

How do you just drive on an engine light lol??? Not all engine lights can be felt when something is wrong. Of course he said this because he really had nothing else he can say. I moved back to the city with a very competent dealer and I am confident in them. Trust me over the 5 years of owning Mercedeses and going to 3 different dealers, this one I'm at now is far more superior and its laughably noticable how much better they are, so I trust them.

All this being said, I've documented everything and sent it off to my attorney. Apparently since I've had various different issues my car isn't technically a lemon, but we will file a DTPA claim. 1 year and 2 months of ownership and I've had 5 check engine lights, among other issues (infotainment crashing, quality issues, etc). I just sent him the details, so maybe 5 engine lights is a lemon although it got triggered for different issues.

Unless Mercedes somehow see's this and gives me my money back then I will obviously proceed with the claim. RIP to my 2019 C43 coupe, that one was perfect. Virtually no issues. This new hybrid powertrain is yuck quality wise.

 

Was wondering if those with the 48v warnings can share if there has been resolutions? I just picked up a 2024 C43 and it’s been back at the dealer for 3 times already. Always the same problem: 48v warning followed by check engine light. Have had the car for 3 weeks and been in the shop for 10 days.

 

From what I read, it is either replacement of the battery or software updates or both that solved it.

 

I think it’s an up date issue. They did replace the cable. But don’t think that was the issue. Haven’t really had a problem again.

 

There you go OP, a software issue or a cable.

 

Take a look at my post from yesterday, 12/11/24. The latest problem is possibly the Power Train Control Unit software which is a known issue with Mercedes. They are working on a software update with no ETA for release...unacceptable! The software update for the transmission is now available after owning our car for 1.5 years.

 

Since I posted about the software update in July I’ve driven 6,000 miles and the problems haven’t reoccurred. In the first 4,000 miles it was occurring at least once a fortnight.

Pester your dealer, there are software fixes available from MB.

 

Same issues and same responses/resolutions. Garbage car. Love the car though, just hate the problems. What’s funny is I bought this car as a transitory car and was going to get a big boy Mercedes (CLE63) when it comes out. Now I don’t think I’ll get it nor will I get my wife a Mercedes. It’s insane bc MBUSA is numb to the complaints I guess.

 

Same feeling...This is my fourth and last Mercedes. Unfortunately, I am upside down on this one, after investing 10K in a full XPEL wrap, 5 year ceramic, tint and its Depreciation.

 

I asked this before when forum members commented this but what will you end up getting as an alternative to MB? Everyone have different preferences so naturally I expect different answers.

 

I have a Porsche Caymen 718 S and it's been great and had a great experience with my BMW 3-series as well. Father-in-law and brother-in-law both own Porsche as well...no issues. So, will be looking at Porsche, BMW, and Lexus to start.

 

I see. Thanks for your reply.

 

I’m so glad I only got the front PPF’d. It’s still wasted money but at least it’s not the full car that got PPF’d. I also have ceramic tint. Also, lucky I paid it off. I had a lot of equity from my trade in, 2019 C43. Depreciation is insane though. Car was $78k sticker. Owned it for a year and a half and now it’s like $44k. 43% depreciation. Makes sense though bc it’s trashhhhh. LMFAO. Second and last Mercedes.

 

New Audi RS5, just don’t know when it’s gonna be announced.

Other option that I really like is a 911 base, fully spec’d out with the Aero Package and everything. My only issue is it’s a base so I don’t really know.

Lastly is an M4, I don’t mind this option at all but it’s been out for a while and due for a refresh. So I’m late on the curve.

My budget is less than $150k sticker for this next round. CLE is what I really wanted, but we all know Merc is turd.