"Charge battery" show on multifunction display. please advise.
I have some problem on my W221 S500. The multifuction display always show the message "Charge Battery" and I could not remove this message. I did change the battery but the message still show then I check the voltage on the battery while the engine is running. The battery voltage is 14V. Now I think the battery and alternator is ok. Could you please advise where should I check for this problem?
I bring my car to check with the Star Diagnostic, there is no error code on the engine and also the ICS.
Please see more detail on the attached pictures.
Thanks for your support.
Korrwit
for the older models, where it lives in the trunk behind the largest vertical panel .
Have you driven it for a while to charge it ?Looking at the odometer your car is almost brand new??
Last edited by marthyh; May 7, 2013 at 12:06 PM.
for the older models, where it lives in the trunk behind the largest vertical panel .
Have you driven it for a while to charge it ?Looking at the odometer your car is almost brand new??
PS. on the space between trunk and rear seat, there is no battery and battery cable. I will get the picture today and post again.
PS2. My friend's car : S350 W221. This car also does not have this consumer battery. Is it possible that it is in another place?
Last edited by korrawitt; May 7, 2013 at 08:39 PM.
You'll have to attach a photo of the trunk panel that you removed. There is actually 3 batteries in the W221. Starter, Consumer and a 3rd battery under the driver side dash.
I've attached a photo for you, again, this is from another member who supplied the jpeg.
Don't charge it by driving around. Get a good battery charger instead (I use a CTEK brand, same one that MB sells, just without the MB "sticker" on the charger)..
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"You can charge your trunk battery by hooking it up under the hood.
On the passenger side just left of the starter battery there is a black plastic box. Remove the cover and you will see the power points for the rear trunk mounted battery. The tall terminal, the one near the front, is the positive terminal. Connect your positive lead there and hook the negative lead to the negative terminal on the starter battery. If you want to charge the starter battery just move your positive lead six inches to the positive battery terminal. Hope this make sense."
See photo.. hope that helps you
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You'll have to attach a photo of the trunk panel that you removed. There is actually 3 batteries in the W221. Starter, Consumer and a 3rd battery under the driver side dash.
I've attached a photo for you, again, this is from another member who supplied the jpeg.
Don't charge it by driving around. Get a good battery charger instead (I use a CTEK brand, same one that MB sells, just without the MB "sticker" on the charger)..
Is it possible that the problem is from the battery under the driver side dash?
"You can charge your trunk battery by hooking it up under the hood.
On the passenger side just left of the starter battery there is a black plastic box. Remove the cover and you will see the power points for the rear trunk mounted battery. The tall terminal, the one near the front, is the positive terminal. Connect your positive lead there and hook the negative lead to the negative terminal on the starter battery. If you want to charge the starter battery just move your positive lead six inches to the positive battery terminal. Hope this make sense."
See photo.. hope that helps you


Have you had the car diagnosed?
Does the alternator really charge the battery?
Do you have a multi-meter? I'm curious if there is any voltage from those two terminals you clipped onto.
Popo here... Has a good point comand should not work if your vehicle is turned off and you don't have a consumer battery.
Hope you figured it out..!
You mentioned your car is still new, then send it to the dealership where you bought it, either demand for a change unit or have the trouble diagnose and rectify by the dealer
Last edited by cool_lagoon; May 26, 2013 at 03:46 AM.
i'm sure your still covered by warranty
i met same chatge battery and battery not charged problems. can not remove that and left buttons on steering wheels can not help with that,
Even local benz official dealer service can not find the reason.
Pls anybody help me

Check the alternator too.
Please any help???
It's red Message "battery not charged"
And after disconnected battery for 30 min I have white message "Charge battery"
In my case it's brand new battery from mercedes.
Must be programmed to the car
I have some problem on my W221 S500. The multifuction display always show the message "Charge Battery" and I could not remove this message. I did change the battery but the message still show then I check the voltage on the battery while the engine is running. The battery voltage is 14V. Now I think the battery and alternator is ok. Could you please advise where should I check for this problem?
I bring my car to check with the Star Diagnostic, there is no error code on the engine and also the ICS.
Please see more detail on the attached pictures.
Thanks for your support.
Korrwit
"You can charge your trunk battery by hooking it up under the hood.
On the passenger side just left of the starter battery there is a black plastic box. Remove the cover and you will see the power points for the rear trunk mounted battery. The tall terminal, the one near the front, is the positive terminal. Connect your positive lead there and hook the negative lead to the negative terminal on the starter battery. If you want to charge the starter battery just move your positive lead six inches to the positive battery terminal. Hope this make sense."
See photo.. hope that helps you

Your post came in very useful.




