any owners run into standby mode not coming up and getting this message, even when battery is fully charged (at least that's what the mobile app states)?

 

Every time I have tried to use it. Hopefully someone has overcome this issue and can report.

 

Last week I drove approximately 130 miles at speeds from 65-85 mph and I still get that message. Shortly after purchase (2024 S580) I could get it to say I could have 5-6 weeks in standby mode but that was months ago. Lately it has been the above message all the time even as you said with the battery fully charged. I bought a Faraday box to keep the fobs in but that has not made a difference. I have no had my first maintenance appointment yet. I will mention this and maybe something will be found.

 

Try checking the battery health in the Mercedes Me app

 

u mean this?
if so...ya... still doesn't allow standby mode🤦🏼‍♂️

 

This https://mbworld.org/forums/c-class-w...ml#post9169443

but... See if this helps https://mbworld.org/forums/c-class-w...ode-issue.html
https://mbworld.org/forums/c-class-w...operative.html

 

Sorry for the confusion what model year is your W223 S-Class? The battery state of charge might not had been introduced until 2024 or 2025 model year MBs.

 

MY22.
seen those links before... still doesn't explain the weird issue.
hoping others who have experienced the same may have found the cause+solution🤞

 

2022 won't state the health of the 12V battery. If confirmed the battery state of charge is good, then it could still be a bad battery because that actual health could be bad. For example, in one of the screenshots it shows the battery state of charge is fill but state of health is bad. If so might need a warranty replacement. That said, a software problem might also be the cause.

 

ya.... here's what's really wonky...the 12V was just recently replaced last week!
standby didn't work before or after replacement🤦🏼‍♂️

 

Sorry to hear that : (

 

I have found I have to put it on a trickle charger the night before, before I can get the standby mode to work even though Mercedes Me shows it as "Charged", but apparently not enough. Then I get message it will hold a charge for 11-13 weeks. I have a 2023 S580.

 

Thanks for chiming in, worth it for OP to try.

 

My ‘21 S580 had standby mode issues until the dealer diagnosed a battery current fault (sort of like a minor short circuit) which they called a “unintended current flow” and replaced the battery. It took 3 visits for them to figure that out, but they did. Their scan tool was not picking up any codes. The tech pulled the battery and put it on some type of advanced battery tester—not your standard Harbor Freight battery tester.

Since that time, all my standby mode “battery charge insufficient issues” have disappeared. Now if I’m parked for a while running accessories, etc. and happen to draw the battery down to the level where Mercedes Me indicates a “partially charged” battery, when I then drive the car for 15-20 minutes home that message goes away and I can activate standby mode for 18+ weeks.

I could never understand why forum members always seem to have to charge their battery. Mine is now always charged (and stays that way) since the battery was replaced. I do drive the car most every day, but usually less than 15 miles and on side roads.

I totally understand why dealers hook up a battery charger, since they always have the doors open with all the interior lighting on and the ignition likely on as well—that will kill a battery fast. But I’ve left my car for 2 weeks (since the new battery was installed) not in standby mode, and returned to Mercedes Me reporting fully charged and everything seems fine.

 

Always a possibility of a bad battery but very unlikely unless it has been abused.

Just like @Mbw2468% said, the trickle charger is the key to getting into standby mode. Put it on overnight to get the battery fully charged.

The MercedesMe app is great but the battery indication is really only going to tell you when the battery is low enough the car is concerned it might not be able to crank the engine over fast enough. If it's not at that low critical level, it will say your good to go even though the battery is not FULL.

 

Or when the vehicle is being left applying a tint, battery will drain quickly.

I wouldn't say it is impossible for a bad battery especially during those times cars were sitting at lots being unsold and so the battery was discharged to the point it caused physical damage, or the battery was defective in the first place. I mean, I did come across threads of bad batteries of newly delivered MBs from other models a few months back so it is not out of the question.

 

what's wonky is that my battery was recently (last week!) replaced...it was deemed faulty. and before it was replaced it wouldn't go into standby mode...same prompt would show.
so they replaced the battery..i drive it home (mobile app shows fully charged battery)...went to standby mode on mbux...same thing, no go.
fresh battery...fully charged...still same bullsh*t...wtf

mind u, the entire reason why i asked warranty to replace the battery was cuz the app would constantly show battery "critically low"...even when i double click the remote to stop the signal.
i would drive the car to fully charge or partially charge...only for it to go critically low in a matter of days if car undriven.
so the dealership deemed the battery faulty and replaced...and i had high hopes that the constant draining would be resolved, and standby mode would be accessible (so that i could further deter any unnecessary drain).
further update...app showed battery fully charged...now partially charged. was undriven since i brought i home few days ago on a brand new battery.

 

I don't care what battery it is or where you live, but if you buy a NEW battery off the shelf, it is charged but NOT FULLY CHARGED.
You can install it in your vehicle and drive for hours and it will still not be technically FULLY CHARGED.
Until you take that NEW charged battery home and put it on a charger for minimum 6 hours (in or out of the vehicle), it is not going to be FULLY CHARGED.
The vehicle internal computer is making the decision as to the state of charge of your battery. The MercedesMe app is not a player in that decision.

 

believe this to be true... at the very least in my case.
dealership installed new battery...app said fully charged... but still not showing standby mode.
after 2 days of driving, battery seems to hold amperage better... standby mode now activated!

I'm assuming this was the problem with the original battery, that was causing it to go into partially charged and/or critically low in less than a week after fully charging... and therefore caused the internal computer from allowing standby mode.

now with new battery it's able to hold the amperage... all good with standby... for now🤞

 

Great! Glad to hear you finally got that sorted out and the car is satisfied with the charge rate of your new battery.

Hopefully other forum members will find this string and learn about this issue as it has popped up as a question here before.

 

It has been said that MB does not fully charge the battery, ever. It charges it to 80% and the app will say fully charge, only a trickle charger will fully charge it. I don't know how accurate is this information or if it was verified and/or the reason behind not fully charging it if true.

 

Of the 30k post from God, this has to be one of the best.

Yes, I took some liberties to help but maybe you should make that statement your forum signature.

 

Thank you for your reply. I do apologize that I did not understand what you are trying to say.

I wrote my previous post based on the following information although I might had understood them incorrectly.

If I understand it correctly (although since you questioned me, I probably got it wrong) the alternator on MB will only charge the vehicle to less than 100% for emission reasons.

This is controlled by the ALT-LIN, it might also be responsible for the COMAND is shutting down messages after keeping the radio on for a short period of time, battery can also drain on idling, my disclaimer on the previous post is because the information might not be applicable or fully accurate concerning the W223 since it has a 48V mild hybrid battery that it also needs to be charged, it also runs mbux. Some W223 might also have a lithium battery stated in the operator's manual, forum members were discussing this in AGM or Lithium thread in the W223 sub-forum.

Sorry for any confusion this may had caused.
https://mbworld.org/forums/e-class-w...ml#post9093533
https://mbworld.org/forums/w212-amg/...ml#post9086071
https://mbworld.org/forums/e-class-w...d-timeout.html
https://mbworld.org/forums/general-m...ml#post8647566
They call it yoyo charging.

Happy to stand corrected if it is the case, I appreciate the learning opportunity.

 

Not being critical of you. Just poking a little fun at the disclaimer you pushed out.

 

It is Thanksgiving in Canada please allow me to say happy Thanksgiving.