HELP Sprinter Battery

OK, #1
Yellow ESP, ABS, Tire and Red brake light on = EBV has been deactivated due to low voltage. Rear wheels could lock up. Consult dealer. I had a dead battery but the light remains on.

#2 Just the red brake light on = Insufficient brake fluid in reservoir. DO NOT add fluid and consult Dealer.
Since the battery is charged I imagine it is related to #2.
I'm 60-70 miles from a Dealer. Is there a way for my to solve this?
Thanks, Marvin

UPDATE--I disconnected the battery 3-4 days ago and today got 12.87 volts with my meter. I haven't re-connected the battery to see if it cranks and runs.
I wasn't aware of the parasitic draw nor was I aware of the battery disconnect switch.

I'll check out the E-brake switch.
Any other thoughts/suggestions will be appreciated.
Marvin
PS, I will also check the owners manual for the light meanings.

If you have the word BRAKE showing, on the earlier Sprinters, that means the fluid level is low. The emergency/parking brake warning light is different. Read the owners manual.

You have a battery ground disconnect up above the accelerator pedal, under the dash, when storing the RV for more than a couple of days, disconnect this, as the NCV3 Sprinters such as yours, are very prone to killing the chassis battery very quickly, lots of vampire draw in these vehicles.

Charles

MB puts E brake switch right at the release lever. That is where I would start.

Thanks all, I will try your suggestions.

Yes it's the red brake light to alert the emergency brake is on. It will NOT go off with E brake released.
Marvin

pull the negative/ground cable on the battery
charge the battery
let it set for a couple of days and check it

all of a sudden it goes dead, and then dead again after charging
sounds like it might be a bad cell in the battery

low voltage on the vehicle CPU can create false error codes

Battery Disconnect is USUALLY only related to your Coach/House Battery. It's there to keep things that are on full time, such as LPG and CO detectors, from running that battery down in storage. At least on our coach, the House Batter CAN be Off while the shore tie is plugged in or generator is running. Is this "Brake" light a warning light on your instrument panel? Same as the light that stays on till you release the parking brake? On some vehicles, there's a Front/Rear equalizing valve, and that light comes on if a leak or something else has caused unequal pressures between front and rear.

Have you plugged something in to your OBD2 test port, or one of the "Power Outlets" and left it in?

Sorry, I can't post pictures now.
Marvin

I'll take a picture---Brake is RED-Engine is yellow.
Marvin

Can you post a picture of the mentioned lights?
I am very familiar with MB sedans, but Sprinter is a bit different animal.
MB has separate light for glow plugs, while engine symbol = CEL means engine/emission code.
Yellow brake light on cluster is pad sensor, red brake light means something bad with the system.
Standard OBD scanner should read CEL code, while reading Mercedes specific codes require very expensive scanners.