Hi guys i have a 112 cdi vito with a big stereo in it and i'm runing 3 optima batteries in it the other day my main battery which the car runs of died i charged it and it was holding 12.5 volts i went too start my car and evrything was fine all the accesories worked and so on but when i went to crank the car over i had a start error displayed on my dashboard and the car won't crank over i have tried evrything from a new battery to jump starts and still the same thing.

if anyone has had the same problem or knows a fix please let me know as i'm stuck without my van thankzs for your help guys