221 - 2009 Need HELP please "Battery Not Charged"
Hello i got my car week a go (W221 2009 4Matik) from first day on my screen was Red message "Battery Not Charged" couple my friend told me is AUX battery but problem is my car have only One battery in front is nothing in the trunk where is suppose to be battery is empty and no wire for battery so never been there a battery.
My front one is after market(not OEM Mercedes) something with 75AH this one also work good and hold power
also i take out small battery under dash check and this one is working good and it hold power
So my be you can suggest me which battery is good for my car or what is the problem.
i have no problem with start and all working good
also my steering wheel buttons on left side don't work also from begin. i though is because red message but now i thing is not

any advices ? or HELP? Please Thank YOU
I have MB STAR if you need something i can give to you quick test on STAR don't give me any error

Last edited by victorgraur; Mar 24, 2015 at 10:39 PM.
If everything inside your car works fine....and your keyless go is always working fine along with interior lighting when the car is not started, then the error is likely referencing the battery in your key....which might need replacing soon.
This is screen
If everything inside your car works fine....and your keyless go is always working fine along with interior lighting when the car is not started, then the error is likely referencing the battery in your key....which might need replacing soon.
i check my car also dealer say my car have only one battery, also today i got OEM battery ordered by my VIN number, and same thing

also i check true MB STAR buttons on the steering wheel and all are working but i cant do nothing on the screen its show me only what you can see on picture

Last edited by victorgraur; Mar 25, 2015 at 09:26 PM.
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and no answer from them if they fix it.https://mbworld.org/forums/s-class-w...ml#post6377694
All 2010+ models have only one battery in the front now? Did not know that...
thats news to me. i thought they all had 2 batteries. Even the facelift models.
https://mbworld.org/forums/attachmen...x59a271038.pdf
After Facelift then come with one battery (don't know about all) my for shore and it OEM battery 95AH 850 CC. This is original data.
2010 221 216 MBUSA released service campaign 201201003 to update IC software due to communication issues. Have dealer check VMI (vehicle master inquiry) to see if update applies to your VIN and confirm it was installed if not, update is free - see attachment.











