Help me one day i left my e250 on and it just went dead i thought that i could just charged it but it keeps saying battery too low system shut down please help.

What happens is, you have a battery and an alternator. The alternator charges the battery when the engine is running. It can only put out so many amps at 12 volts. A/C compressor runs off the engine, but the clutch for it is electric, and the blower fan is electric. When these are running, unless the car engine is running at above idle RPM's, your alternator may not be actually putting out enough amps to run the A/C AND charge the battery. So it is possible for the battery to go dead, especially if you start the car more than a couple times with out letting the battery charge. It happened to a friend of mine. He delivered newspapers, and it was a hot summer day. His A/C was on, plus, his car had 2 electric fans for the radiator. He was only idling along delivering his papers, and at one point he shut his car off. When he went to re-start, it was dead. He called me and I gave him a jump start, and told him to go for a ride down the expressway, to charge his battery. You see the A/C took say 30 amps, then each cooling fan for his radiator took say 20 amps a piece, then add in the stereo, and the power it takes to fire the spark plugs, and there wasn't enough left to charge the battery. Most cars these days only have 100 amp alternators. Older cars have less

Have the vehicle taken to one of many places that will test the Alternator output etc--narrow it down first without replacing that.

Voltage may drop enough to prevent starting without triggering the low voltage issue.

Have you replaced the battery? UPS batteries typically don't last longer than 2-3 years.

I would replace the battery and see if that helps with this problem

did u try connecting it to your computer like i do mine

I have a e250 also and it white screened. I could'nt shut it off. I just left it on overnight and 1/2 of the next day until the battery went dead. Then pluged it in. It Worked!!!!

noticed the oil needed to be changed. It started back up and ran fine for a day then broke down again had to call a tow truck to get home. I changed the oil today with the recommended oil and now its completely dead. New oil new battery new spark plugs, new coolant and a full tank of gas and its worse than when i got it 2 months ago. Don't know what to do anymore. Help me out friends. Thanks. ,Completely dead? Do the lights come on with the key? If not, Then you either have a blown fuse or bad battery connection. A loose connection will cause problems like you describe. New battery or not, I would remove the cables, reinstall to make sure. Is the battery charged? Maybe you have a bad charging system or fuse. A 2006 shouldn't have needed a new battery unless you (or someone lese) left the lights on and totally drained it. My last battery lasted 7 years. Check the electrolyte level in the battery if it isn't a sealed one. Add distilled water if it is low.,,,

does your battery have one of those charge indicator panels on bottom?

also, it's possible that the connection from battery to the internals is shot..if that's the case, then you're looking at a major motherboard swap

alright just take the battery out and put it back in and turn on ur mp3 player.
it takes a little power to take the battery cover off though so dont fell stupid if ur using all ur energy.

if you plug it in to the computer mabe the drive cant charge it in some computers some drives dont charge the mp3s it happened to me but try to connect it to different arias and if that doesnt work buy the wall charger hope it helps.