Weird Electrical Issues
Thread Starter
Junior Member
Joined: Feb 2025
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Weird Electrical Issues
these are my issues
1. When i sit in the car i get the yellow battery sign “start engine”
2. my command screen said “start engine or command will turn on in 3 minutes”. After that command said “command will turn off in 10 seconds” and it completely turned off wouldn’t turn back on until i turned the car off and on.
3. My radar detector plugged into the 12v turned off and wouldn’t turn back on until i turned the car off and on
4. my sunroof tilts open itself after leaving and locking the car.
5. When using my windows they are glitchy sometimes, when i make it go up it’ll not use the auto up feature or it will go auto up then all the way down. just super glitchy
Benz replaced the Aux battery in march
Car Max replaced the main battery in January
I noticed the car was alright had some issues like sunroof opening up and the start engine with a yellow sign it got worse recently and when i plugged the radar in today the screen turned off, and i’ve never had that happen. The car had weird electrical issues since i bought it in december but it’s gotten worse.
I replaced my battery sensor yesterday OEM. Before the replacement my command system would never shut off on its own. My sunroof would also tilt open itself i can’t ever recreate it, does it when it chooses to. I haven’t checked fuses yet, but i’ve heard it could also be my front sam that could be the issue.
1. When i sit in the car i get the yellow battery sign “start engine”
2. my command screen said “start engine or command will turn on in 3 minutes”. After that command said “command will turn off in 10 seconds” and it completely turned off wouldn’t turn back on until i turned the car off and on.
3. My radar detector plugged into the 12v turned off and wouldn’t turn back on until i turned the car off and on
4. my sunroof tilts open itself after leaving and locking the car.
5. When using my windows they are glitchy sometimes, when i make it go up it’ll not use the auto up feature or it will go auto up then all the way down. just super glitchy
Benz replaced the Aux battery in march
Car Max replaced the main battery in January
I noticed the car was alright had some issues like sunroof opening up and the start engine with a yellow sign it got worse recently and when i plugged the radar in today the screen turned off, and i’ve never had that happen. The car had weird electrical issues since i bought it in december but it’s gotten worse.
I replaced my battery sensor yesterday OEM. Before the replacement my command system would never shut off on its own. My sunroof would also tilt open itself i can’t ever recreate it, does it when it chooses to. I haven’t checked fuses yet, but i’ve heard it could also be my front sam that could be the issue.
Out Of Control!!
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Do you trickle charge the main battery? Not saying this is the cause - just a first quick thought
example case:
https://mbworld.org/forums/w213-amg/...e-driving.html
example case:
https://mbworld.org/forums/w213-amg/...e-driving.html
Last edited by PeterUbers; Oct 2, 2025 at 09:56 PM.
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these are my issues
1. When i sit in the car i get the yellow battery sign “start engine”
2. my command screen said “start engine or command will turn on in 3 minutes”. After that command said “command will turn off in 10 seconds” and it completely turned off wouldn’t turn back on until i turned the car off and on.
3. My radar detector plugged into the 12v turned off and wouldn’t turn back on until i turned the car off and on
4. my sunroof tilts open itself after leaving and locking the car.
5. When using my windows they are glitchy sometimes, when i make it go up it’ll not use the auto up feature or it will go auto up then all the way down. just super glitchy
Benz replaced the Aux battery in march
Car Max replaced the main battery in January
I noticed the car was alright had some issues like sunroof opening up and the start engine with a yellow sign it got worse recently and when i plugged the radar in today the screen turned off, and i’ve never had that happen. The car had weird electrical issues since i bought it in december but it’s gotten worse.
I replaced my battery sensor yesterday OEM. Before the replacement my command system would never shut off on its own. My sunroof would also tilt open itself i can’t ever recreate it, does it when it chooses to. I haven’t checked fuses yet, but i’ve heard it could also be my front sam that could be the issue.
1. When i sit in the car i get the yellow battery sign “start engine”
2. my command screen said “start engine or command will turn on in 3 minutes”. After that command said “command will turn off in 10 seconds” and it completely turned off wouldn’t turn back on until i turned the car off and on.
3. My radar detector plugged into the 12v turned off and wouldn’t turn back on until i turned the car off and on
4. my sunroof tilts open itself after leaving and locking the car.
5. When using my windows they are glitchy sometimes, when i make it go up it’ll not use the auto up feature or it will go auto up then all the way down. just super glitchy
Benz replaced the Aux battery in march
Car Max replaced the main battery in January
I noticed the car was alright had some issues like sunroof opening up and the start engine with a yellow sign it got worse recently and when i plugged the radar in today the screen turned off, and i’ve never had that happen. The car had weird electrical issues since i bought it in december but it’s gotten worse.
I replaced my battery sensor yesterday OEM. Before the replacement my command system would never shut off on its own. My sunroof would also tilt open itself i can’t ever recreate it, does it when it chooses to. I haven’t checked fuses yet, but i’ve heard it could also be my front sam that could be the issue.
Do you trickle charge the main battery? Not saying this is the cause - just a first quick thought
example case:
https://mbworld.org/forums/w213-amg/...e-driving.html
example case:
https://mbworld.org/forums/w213-amg/...e-driving.html
OP, do you drive for like 60 minutes once a week on the highway if you don't trickle charge?
Thread Starter
Junior Member
Joined: Feb 2025
Posts: 46
Likes: 2
Do you trickle charge the main battery? Not saying this is the cause - just a first quick thought
example case:
https://mbworld.org/forums/w213-amg/...e-driving.html
example case:
https://mbworld.org/forums/w213-amg/...e-driving.html
Thread Starter
Junior Member
Joined: Feb 2025
Posts: 46
Likes: 2
I daily drive the car i put around 30 miles on the highway easily. I drive in comfort and sport plus both. Also I changed the battery sensor since I had a code for it, code went away. But before changing i would have symptoms such as sunroof opening up on its own once in a while(rarely happened before but became more frequent recently which caused me to change the battery sensor), and my auto start stop wouldn’t work. Now i see all of those issues, plus my 12v not working and command shutting off. I was wondering do I need to program the battery sensor through xentry, to let the car know there’s a new battery sensor or maybe reregister the battery. I plan on taking the car on monday to benz to show them maybe they can get it programmed
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
To the best of my knowledge you do not need to register your battery as I have to in a bmw.
have you checked all ground points/connections in the car for loose or corroded connections?
did this car see water ever?
have you checked all ground points/connections in the car for loose or corroded connections?
did this car see water ever?
Thread Starter
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No sir this car has never seen water, also these symptoms became a lot worse after I changed the Intelligent Battery Sensor two days ago. I was wondering maybe if the sensor itself needs to be programmed or maybe registering the battery again? The car sunroof used to open up back in january because an old main battery. Auxiliary battery has been changed too. If the car had seen water before my ownership, where would you think it would be and is it fixable? Would that be an issue with fuses?
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Out Of Control!!
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
No sir this car has never seen water, also these symptoms became a lot worse after I changed the Intelligent Battery Sensor two days ago. I was wondering maybe if the sensor itself needs to be programmed or maybe registering the battery again? The car sunroof used to open up back in january because an old main battery. Auxiliary battery has been changed too. If the car had seen water before my ownership, where would you think it would be and is it fixable? Would that be an issue with fuses?
water ... no way to know what corroded or oxidized ... what is the dealership will to do in terms of diagnostics to help you with this?
i don't know if the battery sensor needs to be programmed
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Thread Starter
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I talked to the dealership they said they would do a diagnostic on the car for 235, assuming that i don’t do the work with them. But they will check out the car see if any codes show up, basically take a look at the car in general. they said it doesn’t need programming so the issue is definitely something else. I’m really hoping this can be fixed money is tight right now lol. I feel like it’s a voltage thing since the command is shutting off after the car is on and turns back on after shutting the car off and on. same with the 12v socket, turns on in the beginning then turns off. I don’t think fuse is an issue or anything because water damage is water damage always gonna have an issue and nothing has happened recently. I guess i’ll let benz check it out hopefully it’s a super simple fix maybe xentry can find out what’s exactly wrong immediately. Let’s see though pray for my car lol!
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I daily drive the car i put around 30 miles on the highway easily. I drive in comfort and sport plus both. Also I changed the battery sensor since I had a code for it, code went away. But before changing i would have symptoms such as sunroof opening up on its own once in a while(rarely happened before but became more frequent recently which caused me to change the battery sensor), and my auto start stop wouldn’t work. Now i see all of those issues, plus my 12v not working and command shutting off. I was wondering do I need to program the battery sensor through xentry, to let the car know there’s a new battery sensor or maybe reregister the battery. I plan on taking the car on monday to benz to show them maybe they can get it programmed
Thread Starter
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I am not disregarding the possibility of a bad/defective replacement battery you have because the symptoms does seem like it a bad battery although other forum members mentioning water ingress damaging the electricals being another possible cause. Sorry that I wasn't able to help out.
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From: Los Angeles
2020 E53 AMG Sedan
on every mercedes i have owned or worked with, a bad battery causes the weirdest issues you can imagine and it's always went away with a new one. you could probably buy a new battery for about that diagnostic cost and if it doesn't sort it just return it
Thread Starter
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Thread Starter
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Joined: Feb 2025
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I am not disregarding the possibility of a bad/defective replacement battery you have because the symptoms does seem like it a bad battery although other forum members mentioning water ingress damaging the electricals being another possible cause. Sorry that I wasn't able to help out.
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Out Of Control!!
Joined: Jun 2004
Posts: 13,799
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Member
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From: Los Angeles
2020 E53 AMG Sedan
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Thank you for your kind words. I try my best as a retired personnel. Although admittedly I do get things wrong at times and I note down the corrected information to answer a similar question with the updated and corrected information I come across later. It is like a student at school again. Drive safe 
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Thank you for your kind words. I try my best as a retired personnel. Although admittedly I do get things wrong at times and I note down the corrected information to answer a similar question with the updated and corrected information I come across later. It is like a student at school again. Drive safe
