I have a scudo 07 van and today its picked up a couple of odd faults, I have looked on google with no luck and contacted 4 mechs and they haven't a clue, so I'm hoping you guys might have come across it...

I know its sounds weird but when I got into the van a voice said low battery.. at first I thought it was the sat nav of camera so I put them in the back, then the voice said it again, so I bought a new battery and low and behold the voice again "low battery" the passenger window is also going down on its own and wont go back up unless I turn the ign off wait 5mins then now and again goes up.

what I have done so far is:-
changed the battery
tested the alternator (which is fine)
new battery in the key thob
swore at it a lot!

please help lol (no joke.. no ghost..)