12V Battery Issue(s)
Thread Starter
Junior Member
Joined: Aug 2023
Posts: 36
Likes: 10
From: Ohio & South Carolina
EQE SUV 350 4Matic and 2024 Tesla MX LR
12V Battery Issue(s)
Last Saturday my wife took our 2023 EQE SUV to Lowes. When she came back to the car and tried to start it she saw a 12V battery message saying that the battery was low. Almost immediately a series of messages flashed saying that various safety systems would not be available.
I drove to her location and started the car. I saw the same messages. We called the MB dealership and told them what had happened. We drove the car to the dealership and left it there over the weekend. Today I got a text from the dealership service department informing us that after they too saw the 12V battery message they "updated 9 separate control modules to optimize energy flow and charging ." They subsequently "went through several drive - park cycles and will now "put the car to sleep for an overnight park cycle."
So I'm happy with the update text from the dealership but unhappy that this relatively new car with low mileage (8,016 miles) is having electrical system issues.
Has anyone else had this problem?
I drove to her location and started the car. I saw the same messages. We called the MB dealership and told them what had happened. We drove the car to the dealership and left it there over the weekend. Today I got a text from the dealership service department informing us that after they too saw the 12V battery message they "updated 9 separate control modules to optimize energy flow and charging ." They subsequently "went through several drive - park cycles and will now "put the car to sleep for an overnight park cycle."
So I'm happy with the update text from the dealership but unhappy that this relatively new car with low mileage (8,016 miles) is having electrical system issues.
Has anyone else had this problem?
MBWorld God!
Joined: Dec 2019
Posts: 32,375
Likes: 6,327
Last Saturday my wife took our 2023 EQE SUV to Lowes. When she came back to the car and tried to start it she saw a 12V battery message saying that the battery was low. Almost immediately a series of messages flashed saying that various safety systems would not be available.
I drove to her location and started the car. I saw the same messages. We called the MB dealership and told them what had happened. We drove the car to the dealership and left it there over the weekend. Today I got a text from the dealership service department informing us that after they too saw the 12V battery message they "updated 9 separate control modules to optimize energy flow and charging ." They subsequently "went through several drive - park cycles and will now "put the car to sleep for an overnight park cycle."
So I'm happy with the update text from the dealership but unhappy that this relatively new car with low mileage (8,016 miles) is having electrical system issues.
Has anyone else had this problem?
I drove to her location and started the car. I saw the same messages. We called the MB dealership and told them what had happened. We drove the car to the dealership and left it there over the weekend. Today I got a text from the dealership service department informing us that after they too saw the 12V battery message they "updated 9 separate control modules to optimize energy flow and charging ." They subsequently "went through several drive - park cycles and will now "put the car to sleep for an overnight park cycle."
So I'm happy with the update text from the dealership but unhappy that this relatively new car with low mileage (8,016 miles) is having electrical system issues.
Has anyone else had this problem?
Senior Member
Joined: Mar 2023
Posts: 368
Likes: 136
EQE350 SUV 4MATIC
It is a common failing and there is a recall that will likely apply the same updates that you got. It is expected to eliminate these erroneous warnings and the car should be fine going forward.
The 12V battery is recharged when it goes low. It does not matter if the car is turned on or left for months.
Ps. and the trick is to lock the car and leave it for about 5-10 minutes to allow the systems to reset themselves.
The 12V battery is recharged when it goes low. It does not matter if the car is turned on or left for months.
Ps. and the trick is to lock the car and leave it for about 5-10 minutes to allow the systems to reset themselves.
Last edited by LastOne; Jul 1, 2024 at 03:59 PM.
