Mercedes 48v issues 2021 forum. I’m glad it’s leased, not purchased.

Mercedes 48v issues 2021 forum I opened the 48v battery and charged it with 48 v charger and now it shows 48v but terminal 40 doesn't provide power out to the ISG/ car does NOT start. This defect is said to affect 2019-2021 model year Mercedes-Benz vehicles including GT-Class, GLS-Class, GLC-Class, C-Class, CLS-Class, E-Class, and GLE-class M-B hybrids. Jul 24, 2018 · Got the car in March 2019, problems started in October 2019. Dec 5, 2021 · Towed the car over to the local dealership. Mar 17, 2024 · 2021 GLS 450 Mercedes Benz within several days of purchasing in late Fall 2021, while in motion at 65MPH or more, the vehicle suddenly flashed all kinds of malfunction warnings (the entire dashboard was lit up w every system “warning”) including 48V battery code, within seconds the car shut down while driving on the highway, no power steering, no brakes, no anything – nearly lost our Feb 2, 2014 · E63 AMG Things I would look for with this car. Jul 26, 2023 · Mercedes-Benz has even issued a technical service bulletin that addresses the 48V on-board electrical system problem. A new battery was shipped from Mercedes. org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. 12v is still fairly important , even for starting the engine. I’m glad it’s leased, not purchased. Sep 23, 2019 · BenzWorld. A couple of months after taking delivery my car showed a red “12 volt battery not charging error” message. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! There have been some issues with the 48v battery but I think the prevalence is overweighted on forums. I replaced the pyrofuse, replaced 12v battery. 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. Oct 18, 2022 · Dealer just diagnosed the problem from examining fault codes. 6 watt fuel pump and May 19, 2024 · GLC Class (X254) - Bad user experiences with issues with my 1st MBUX updates - Yesterday, Mercedes 2024 GLC 300 4matic SUV's MBUX said an update available was available. Not have any ways for repair?Only replace? Jun 9, 2020 · New to the forum and I need some community assistance. Aug 7, 2024 · Today, more than ever, there are ongoing software updates to fix issues, and these updates are done after the OEM has oftentimes worked with multiple suppliers because coding changes can affect multiple controllers in the car. June 28, 2021 — A Mercedes-Benz GLE 450 class action lawsuit alleges the SUVs suffer from problems Sep 20, 2022 · The Mercedes technical documents say that you cannot charge the 48v directly, so I suspect that when you connect to the jump points it goes through a control box sat on top of the 48v, that directs the flow to the 12v in the boot floor and then it uses that to send converted current between the 48v and 12v. My local Mercedes service manager tells me the Mercedes "fix" is to take a "sunday drive", or use a trickle charger. 3rd visit: replace the battery May 7, 2024 · I've had the same commute for over 30 years, and owned Chevy, Ford, BWM, and have never experienced this issue. I have a new 2020 MB GLB250 4Matic. I do repair those batteries for customers by just opening up, digging into the circuit boards, and refreshing some EEPROM files. This is worrisome for the future. 4 watts. The car simultaneously shut off, and I couldn’t restart it for about 20 secs. It has a relay that turns off the battery when the voltage drops. Came back from Europe, COVID started. Aug 20, 2024 · Once the 48v battery reaches +/- 18v, it will be disabled by the Battery Management System (BMS). What is your experience with these 48v systems (good or bad)? I'm seeing some reports on a fix being a computer reflash/update, and others replacing the 48v battery. Also, I see that a 12v charger might charge 48v through a converter, but no Jun 28, 2021 · Mercedes-Benz GLE 450 owner says th 48-volt batteries cause failures to start the vehicles. . Lawsuit List Most Popular Oct 17, 2020 · Hi, I had the same problem with 2016 GLE 450 AMG, (bought new from the dealer) The first week I received it the car would completely shutdown I would have to open the door in order to restart it, for 4 years I had nothing but problem after problem, mostly electrical. Fall 2020, as soon as it's colder, the problem starts again. Feb 16, 2024 · I’m in the market for a used E450 All Terrain, likely 2021 model year, and there are currently at least 2 listed for sale with lemon titles because they’ve been repurchased (and apparently repaired) by Mercedes because of “battery issues. So, if we take that (required) 57. I delayed it since I wasn't ready since it might cause problems. I ignored it, but did stop when various mercedes-Benz STARTUNED septemBer 2021 5 hI h enerGY At 48V, that 2. 110 being sold throughout the U. Gave up. ” Apr 5, 2021 · (04-06-2021, 05:34 PM) fanatrally Wrote: (04-06-2021, 02:44 PM) deimonk Wrote: Replacing the 48v battery will solve the problem. Dec 24, 2021 · The defect causes vehicles to shutoff, overheat, go into limp home mode, or lose acceleration at highway speeds. Mar 5, 2024 · I have a 2021 GLE 53 with rear accident. 1. Therefore, introducing outside coding could cause issues in the long-term. It seems to be the now-common problem of the faulty 48 volt battery needing replacement. saying (what I'm looking into a GLS and notice there are some reliability issues with the 48v mild hybrid system. 48v battery is main power source for starting/stopping your engine at stop lights, etc. Jan 31, 2022 · Hello all, I’ve an ongoing problem with a 2021 model C-Class - so I thought I’d ask if anybody else has seen or heard of anything similar. ) The very big issue is the engines head bolt issue. In 2 years you will know for sure whether it's been permanently solved, and if so - I would say it's as reliable as any other Dec 8, 2023 · I have a 2021 GLC300 with 48v mild hybrid system and I do read the forums regularly but cannot recall too many posts about problems with this system but as has been said it is relatively new. It's on current recall but this is after I had to replace mine on a 2yo GLS450 in March for $5k. Jan 5, 2021 · 4 months and 3,000 miles into my 2021 GLE53 AMG. Also, 48-volt batteries in tandem with 12-volt batteries on the same car and dealerships without knowing how to remedy the failure of cars with new complicated computer relationships. 5 Ohm load running at the same 4. This is Mercedes' new "hybrid" design, supposed to be more fuel efficient. The BMS cannot be reset or reprogrammed with conventional scan tools. First time in 40 years ,have had a bad one,so best of luck in your next purchase👍😇 Appears MB has zero idea how to deal with it. (Dec 2019) Problem stared again in late Feb 2020. Aug 7, 2021 · (08-08-2021, 12:35 AM) A2ua Wrote: charge with terminals under bonnet as usual with 12V charger. Initially, it was mentioned that the sensor module of the hybrid/high-voltage battery had a malfunction, it was suspected to be an internal electric fault. One describes multiple defects and another focuses on a vehicle speed control problem. Another relates to a recall that affects the 2021 E-Class backup camera. 3 minor issues: 1) driver side headliner microphone stopped working, resulting in having to shout into the passenger side headliner microphone in order to be heard on a phone call, or using "hey mercedes", 2) audio volume adjuster does not gradually raise/lower volume, instead it jumps several levels with each turn of the adjuster, 3) the Jul 2, 2023 · Other Cars - Mercedes 12v battery critical - This is a 2021 with 48v system --- I thought it no longer had a 12v battery and just stepped down the 48v for a few legacy 12v systems. Apparently I was wrong. I was hoping it would fix the lack of You forgot your phone. does not strike me as a big problem considering how many cars have this system. 1st visit: there is nothing wrong (Nov 2019) 2nd visit: we'll replace the faulty battery. Jan 24, 2021 · Comments of the 2021 years have reports of dealerships unable to diagnose and resolve issues. I’ve read about this battery issue in several forums. My E450 is only four months old with 3100 miles. M156 head bolt problems - Page 16 - MBWorld. They quietly released an official recall in February which was a software update that seems to have solved the issue. What Some Owners are Saying About Their 48V Battery Problems. 8 amps would try to consume 230. org Forums Jun 22, 2021 · A class action alleges Mercedes-Benz was aware that the 2021 450 GLE suffered from an electrical system defect yet did not disclose the problem to drivers prior to sale. K. Does anyone else have a Mercedes sitting a dealer waiting for a 48V battery system? My 2021 GLE450 (which has been problem after problem, even outside of the 48v issues) has been parked at the dealer for a month, I was told it would be ready 9AM the next day on Oct 17, then I was told 5-8 business days, then "a couple weeks" then "end of Apr 28, 2023 · Also affected by the 48V battery problem are model year 2020 Mercedes SUVs. Mar 19, 2024 · How awful,the auxiliary battery presented problems in first 3 weeks on 2nd shut down I refused to take back car, now have a brand new one and never sit in it with anything running ,or reading lightnon Nada,like you lost all faith in brand ,but My local dealer Bolands were meriful and replaced it. And don't forget about the thermal paste. Been severely disappointed with Mercedes USA Corporate, Park Place Mercedes in Dallas & Autobohn Mercedes in Grapevine. dc/dc converter is glued to 48V battery Oh I did try this but did nothing, I can try again but apparently they have a relay that shuts the battery down if it gets low, it's ment to be inside the battery but I have no idea, daxxer can do it but not been online for a while. Mar 21, 2024 · The recall affects 116,000 2021–2024 GLE and GLS SUVs from Mercedes-Benz, Mercedes-AMG, and Mercedes-Maybach to fix an issue with a 48-volt ground connection that could come loose. Since new there has been an annoying audio sound that seems like it is coming from the front speakers or possibly the driver-aid electronic assembly at the top of the windshield. ozprewz qxgnr iolnaep jcllmt vvr fvxj jcvqb xfcu ykzfhy dflgvy