Mercedes 48v issues 2021 forum. Apparently I was wrong.

Mercedes 48v issues 2021 forum My local Mercedes service manager tells me the Mercedes "fix" is to take a "sunday drive", or use a trickle charger. Mar 5, 2024 · I have a 2021 GLE 53 with rear accident. 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. A low battery can cause all kinds of problems. Jun 9, 2020 · New to the forum and I need some community assistance. A new battery was shipped from Mercedes. This is worrisome for the future. should be about 35-55V, but car batt only show about 3,9V when I have real data again from car, I will post again. 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. does not strike me as a big problem considering how many cars have this system. I have about 4500km on it so far and have many of the same issues you have raised. Short runs in the car (lockdown rules) fixed the problem for a day at most before they all returned I bought a CTEK MXS-5 and connected it up. 3rd visit: replace the battery 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. It's on current recall but this is after I had to replace mine on a 2yo GLS450 in March for $5k. I hope this helps. 48v battery is main power source for starting/stopping your engine at stop lights, etc. While boasting hybrid drivetrains and complete plug-in hybrid models and being packed with electronics and features, the Mercedes GLC Problems are seemingly high. So I would assume that it still somehow gets charged, but perhaps does not enable 48v circuit in the engine compartment near the SGR and through the visual purple lines seen in the engine compartment. Mar 20, 2023 · (03-20-2023, 01:38 PM) Eng. could have been some Jan 7, 2021 · Hello Forum! We leased a 2021 GLA 250 and have had a number of issues and disappointments with it. Another relates to a recall that affects the 2021 E-Class backup camera. Jan 5, 2021 · 4 months and 3,000 miles into my 2021 GLE53 AMG. Make sure it’s the Mercedes warranty not some third party one. I have a GLE 580 and love it. . May 16, 2024 · A forum community dedicated to Mercedes GLE owners and enthusiasts. The web suggested the alarm problem was due to the battery. They quietly released an official recall in February which was a software update that seems to have solved the issue. Jul 31, 2023 · I’m a big fan of IL6 engines so I’d really like the E53 the only thing holding me back is the added complexity of the starter generator 48V hybrid system, if it proves reliable (introduced in 2019) I’ll probably bite the bullet and buy one next year unless a really well looked after E43 turns up (only made 2017-18) Feb 14, 2023 · The Mercedes GLC is the successor of the GLK and competes in the compact luxury crossover segment, and is also seen as a mid-size SUV. The display built up to Stage 3 then appeared to stall. (Dec 2019) Problem stared again in late Feb 2020. It has a relay that turns off the battery when the voltage drops. Not have any ways for repair?Only replace? 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. Home. One describes multiple defects and another focuses on a vehicle speed control problem. ” Jul 26, 2023 · Mercedes-Benz has even issued a technical service bulletin that addresses the 48V on-board electrical system problem. In this The 2021 also has their new inline 6 engine whereas the 2020 has the older M276 although you get a boost in HP over the 2018 model. 01: 48V Battery Benefits By using a 48-volt electrical system in new Mercedes-Benz vehicles, the car can be powered solely on the electrical system battery instead of using the drivetrain batteries. So, if we take that (required) 57. 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. Came back from Europe, COVID started. Jul 3, 2023 · 2021 - : S350D, S400, S450, S480, S500, S580, S580E, S500 Maybach, S680 Maybach Jan 5, 2022 · Sorry for the late reply, been busy. Aws Wrote: what are the faults in Xentry? Hi, thanks for reply me, too much sorry I lost all picture I take when diagnose with xentry. Oct 18, 2022 · Dealer just diagnosed the problem from examining fault codes. As such, it is not acceptable whatsoever to publish any software that is bound by any legal restriction. I replaced the pyrofuse, replaced 12v battery. Aug 1, 2023 · In early July, a plethora of Mercedes-Benz passenger models, including 2021-2023 GLC 300s, 2021-2023 GLC 43s, and 2021 AMG GLC 63 models, were hit with a recall over a fuel pump problem. Then it sat in my garage for about three weeks (I was out of town). I’d say go gas personally. Jun 3, 2023 · Maybe it is connected to online services, alarm system, 360 degree feature or whatever. In 2020, with the facelift, MB switched the 450 to the M256 and introduced 48V with that too. Feb 19, 2024 · Mercedes Needs To Fix 48v Connection On Several Models Over Fire Risk. 1st visit: there is nothing wrong (Nov 2019) 2nd visit: we'll replace the faulty battery. Mar 31, 2022 · 2021 AMG GLE 53 Custom Wheel to 23" and Tire Choice. Just the way the car starts when you jump in, due to the 48V motor spinning it up, it's kinda neat. Wanted to post here and see if anyone has had similar experiences or if we have just been unlucky. I’m glad it’s leased, not purchased. Towed to dealer and they mentioned it is a defective main battery. Well, maybe for the cars that have auto/start stop issues, largely the SUV’s… some have 48v system issues, especially the GT’s… another car I just worked on last week had a once in every 8,000 mile problem that said: “do not shift gears”. 12v is still fairly important , even for starting the engine. Jul 24, 2018 · Got the car in March 2019, problems started in October 2019. I ignored it, but did stop when various 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. mercedes-Benz STARTUNED septemBer 2021 5 hI h enerGY At 48V, that 2. Therefore, introducing outside coding could cause issues in the long-term. When the hood is open the 48v system is naturally deactivated. 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 is Mercedes' new "hybrid" design, supposed to be more fuel efficient. I found CPO models near the same price as some non-MB dealer options, and ended up with a same 2020 model year as a CPO I was cross shopping, but the non-CPO car was registered later by 14 months and had a factory warranty LONGER than the CPO option. Mar 23, 2022 · The W167 chassis (GLE / GLS) has been riddled with 48V electrical system issues and the infamous 9-speed transmission jerkiness. saying (what 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. org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The one engine complaint that isn’t included in an electrical system problem, does relate to loss of power. 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. problem detect on N80 (if not wrong) in G1/3. What Some Owners are Saying About Their 48V Battery Problems. So, in effect, all these problems are related and there are a total of 11 altogether. 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 November", and then, when I picked up the loaner, "3,4, maybe 6 months". I was hoping it would fix the lack of You forgot your phone. 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. 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. The GLE 350 engine - key facts and specs. I have noticed the “clunk” when the car is down shifting when slowing to a stop. The car simultaneously shut off, and I couldn’t restart it for about 20 secs. ISG worked briefly Cruise Stop Start CSS only worked one day we took a run of 50 miles then neither worked for weeks. Oct 28, 2022 · Kia problems have been reported attributed to the 12V battery (example here) Kia Ceed 1. All other models got 48V in 2019 (still pre-facelift). Dec 24, 2021 · The defect causes vehicles to shutoff, overheat, go into limp home mode, or lose acceleration at highway speeds. The MB warranty literally just extends the factory coverage and mine was very cheap to add. 5 MHEV 2021 "Check 48V system" I'm guessing (hoping!) that a higher capacity 12V battery is fitted to Kia Ceed MHEVs than i20s, but the Hyundai/Kia 48V system is undoubtedly complex and complexity and reliability are often unhappy bedfellows. If you know the car is going to sit for ”extended periods of non-operation” (Mercedes manual) you should turn on the “standby mode” found in the multimedia system under settings>vehicle>open/close. Jan 24, 2021 · Comments of the 2021 years have reports of dealerships unable to diagnose and resolve issues. I almost created and posted a YouTube link for this but here's a few pics to show the process of disconnecting the 48v battery to charge your 12v in storage. Forums Apr 6, 2024 · 2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) General G20 Sedan / G22 Coupe / G26 Gran Coupe Discussions 2021 and up G22 M440i reliability/issues Pre-facelift E450 was the only variant that didn't get 48V mild hybrid in 2019/2020. That was a GLC 300. Shark450; Jul 1, 2022 Mercedes EQ Forum 7K members. Fall 2020, as soon as it's colder, the problem starts again. 8 amps would try to consume 230. 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. 4 watts. I delayed it since I wasn't ready since it might cause problems. Been severely disappointed with Mercedes USA Corporate, Park Place Mercedes in Dallas & Autobohn Mercedes in Grapevine. It seems to be the now-common problem of the faulty 48 volt battery needing replacement. The BMS cannot be reset or reprogrammed with conventional scan tools. "mild hybrid" seems to be for lack of a better term, like "partial 48V electrical system with energy recovery" or whatever else more descriptive, just don't work for marketing ;-) Sep 14, 2023 · Put 3000 miles on it with no problems whatsoever. Dec 7, 2020 · Once the 12v battery is seen as full, it will then start charging the 48v system. So I drove it. The contents of this forum are for experimental & educational purposes only. 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 Jun 10, 2021 · Hi All, Have a 2021 GLS450 with barely 4K miles (purchased in Jan2021), and car would not start this morning. 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. It's currently at the dealer for repairs on the issues below. Also, I see that a 12v charger might charge 48v through a converter, but no 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. 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. I selected the Car AGM option and waited. 2021. Feel free to share your classic Mercedes-Benz here! Check out our new wiki to help you troubleshoot and keep your Benz running like new. The 350 version of the Mercedes-Benz GLE will cost you about $60,000 and it's considered to be pretty affordable when it comes to Mercedes SUVs. 5 Ohm load running at the same 4. A few days ago I received an automatically generated email from Mercedes Me Connect telling me my battery charge status was “critical” and to drive the car for 30 to 60 minutes or connect a battery charger. Literally just had the car in a few months ago for a routine check/oil change and not a single warning. From a basic google search I’ve found it not just limited to the A6 but a whole bunch of other Audis (and Mercedes) that use the 48v battery system, including those in the screenshot I posted. 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. Jul 26, 2023 · We are looking at these problems together because 5 of the electrical system problems in NHTSA complaints link to engine problems. Every car just has a different problem, it’s really difficult to pin down. Sep 23, 2019 · BenzWorld. I have a new 2020 MB GLB250 4Matic. Member/s doing such will be membership revoked. Aug 23, 2023 · The most common problems:Camtronic problems, carbon buildup on intake valves, additional emission filter potential issues at high mileage. Aug 7, 2021 · (08-08-2021, 12:35 AM) A2ua Wrote: charge with terminals under bonnet as usual with 12V charger. My car is a 2021 E 450 All Terrain with approximately 6,700 miles, delivery Mercedes Dealer can't find the problem and and they also can't reproduce the failure because it has to be very hot weather. And don't forget about the thermal paste. 19 33K Oct 29, 2021 I previously drove a Hyundai Tucson and did many 8+ hour road Aug 20, 2021 · Bought a new UK model i20 Premium 48v mini hybrid at the end of June. Feb 19, 2023 · The Start/Stop finally delivers (I turn it off in my T6!). And the 48V battery system has been problematic for some folks. 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. It’s nicknamed the 160-lemon… I had a really tough time getting my MB wheels smoothly balanced over a 3 year period - which was unexpected. Apr 14, 2022 · Mercedes drivers who’ve had problems with the 48-volt batteries in their vehicles. Mar 9, 2021 · However the car always started and ran well. A couple of months after taking delivery my car showed a red “12 volt battery not charging error” message. Gave up. 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. They only have done some updates, now he has to wait for the next summer to check if it will happen again. 2022 GLE 450 suv with coolant issues. The battery charging in idrive is found under driving info, power flow to charge your 48v battery. 6 watt fuel pump and I'm looking into a GLS and notice there are some reliability issues with the 48v mild hybrid system. Everything that has to do with Mercedes Benz, Tuning and most importantly, keeping these cars on the road. 110 being sold throughout the U. Mar 7, 2022 · Here is the tutorial on repairing the Mercedes Benz 48 volt mild hybrid battery using CG100 Prog III or CG100X programmer. K. 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’ve read about this battery issue in several forums. Feb 9, 2024 · I have a 2023 “Facelift” version of the GLA250 with the 48v Mild Hybrid which was delivered in Oct-2023. E63 was the only model to never have 48V in all W213 model years. I do repair those batteries for customers by just opening up, digging into the circuit boards, and refreshing some EEPROM files. Mines a hybrid and have no issues at all but I’d also strongly recommend getting the extended warranty through Mercedes as well. These consist of the 2021-2023 CLS 450, 2021-2023 E 450, 2021-2023 E450 All-Terrain, 2021 AMG CLS 53, 2021-2023 AMG E53 Nov 23, 2022 · Another user on the forum had a complaint about a pulley making a lot of noise, and was effectively told to suck it by Mercedes after they couldn't fix the problem 2021 GLA 250 pulley noise AC sounds like it's not really a car issue, depending on the kind of environment you live in the filter can get dirty quickly. Aug 20, 2024 · Once the 48v battery reaches +/- 18v, it will be disabled by the Battery Management System (BMS). My E450 is only four months old with 3100 miles. in actual value there terminal 40 point is bellow from actual value. 1. Apparently I was wrong. The M276 is a pretty solid engine but the newer I6 is probably a little too new to tell yet but so far it doesn't sound like there's any issues with it. Typically happening from 3rd to 2nd but most notable from 2nd to 1st. Dec 5, 2021 · Towed the car over to the local dealership. Apr 1, 2024 · 2021-2024 Mercedes-Benz AMG GLE 63 S A 48-volt ground cable lug under the passenger seat may not be secured properly, resulting in the ground connection overheating. 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 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. Jun 5, 2022 · It may be that the reason the very latest (2025) Hyundai i20 models are no longer mild-hybrid is because of problems with the 12V + 48V system, but equally likely that choosing to downgrade the 'mechanical' specification and upgrade the 'tech' specification was a costing decision. 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. 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. feu yrnodj axdebw lgggmx jgox rpds mgzht uhgu iqtgb vdyx