Mercedes 48V Battery Problems

Mercedes 48 Volt Battery Problems? Here’s What You Need to Know.

Imagine you’re headed out the door to an important meeting but your new car won’t start. That’s exactly what happened to one woman in New York City recently when she parked her Mercedes-Benz CLS without any lights or electronics on. After several hours the 48 volt battery had been drained completely! Does this 48 volt battery problem sound familiar? If so, read on.

If you own a Mercedes and have been experiencing 48 volt battery problems, you’re not alone. A lot of other drivers have been dealing with issues related to the battery, such as unable to start the car and even shutting off while in motion. Unfortunately there doesn’t seem to be a fix for it just yet. In this post we’ll provide the current information about the problem, and also symptoms to look out for. So if you own a Mercedes and are having 48V battery problems, here’s what you need to know.

What are the Symptoms of Mercedes 48V Battery Problems?

There are several different reported issues with the 48 volt battery system owners need to be aware of. However, the most common are no starts and vehicles shutting off. Owners report that these problems occur randomly, even when the car is brand new with less than 50 miles. More concerning, these vehicles cannot be jump started requiring a tow to the dealership.

Additionally, vehicles that are towed to the dealership often sit for days while mechanics try to diagnose the problem. Dealerships will often cite problems with the 48V mild hybrid system are extremely rare, despite complaints on the popular Mercedes forum mbworld.org. Unfortunately, some vehicle owners are stuck with paying for diagnostics, software updates and even battery replacements. Often times the problems associated with the 48V battery return not long after being serviced.

What Are the Warning Signs of 48V Battery Problems?

Owners report that early warning signs of battery problems include warning lights or an error code on the dashboard. Some owners have even cautioned extended use of the MB app citing potential cause of additional battery drain.

Mercedes 48V Battery Problems
Owners often report warning messages when the 48V battery malfunctions

Which Mercedes Models Are Affected?

Mercedes-Benz has been experiencing an increase in the number of complaints with their 48V battery system. At this moment, problems are being reported with the following models: E-class, CLS-class and GLE/GLS-class model year 2019 and up for the sedans. Also affected by the 48V battery problem are model year 2020 Mercedes SUVs.

What Some Owners are Saying About Their 48V Battery Problems

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.

mbworld.org

Just happened to me today. Car gave me the 48v battery warning and then popped another alert that said turn engine off (overheating warning) luckily I really close to home. Getting it towed in morning. I will update when I learn more.

mbworld.org

Fortunately, both of my failures have occurred while the vehicle was at home, but I suppose it could have happened anywhere. Other members have reported failures while one the road. One person mentioned that the problem occurred while in a high speed lane on the highway and he felt fortunate to be able to get the car to the shoulder. It concerned me enough that I changed my plans for a road trip and opted to fly instead.

mbworld.org

Experiencing Problems with your Mercedes 48 Volt Battery?

If you are experiencing problems with your 48V battery we want to know. Please tell us about your 48V battery complaint. We will continue to follow this situation and share updates to this post as more information becomes available. Please consider subscribing below.

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Christopher

View posts by Christopher
Loves anything with a motor and wheels. Christopher is an internet technology and automotive expert. When he's not at the local autocross event, he can often be found working on one of his cars. He loves nothing more than taking something apart and putting it back together again–better than before.

2 Comments

  1. Avatar
    RolfApril 5, 2022

    Was at restaurant & afterwards E450 did not start and then died. Had to leave & next morning a Mercedes courtesy booster car told me immediately that a tow to dealer needed. Said he has seen several other cases recently all due to 48 volt system. Dealer said it likely was the 48 volt battery but they needed Mercedes HO permission to fix. Took several days. – No problems since but ???

    Reply
  2. Avatar
    Badrideen BadrideenMay 19, 2022

    I had the same problem
    My new Mercedes Benz c200 2022
    Just not more than 1900km
    Got this issue yesterday
    Battery 48v problem and engine won’t start

    Reply

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