We have a 1year old Marco Polo , the control panel showed 5.7 volts yesterday,so non of the camper electrics worked, no roof ,no fridge etc.I looked at the battery under the passenger seat and it is a "starter battery" I've always believed that in a camper ,caravan ,motor home,the battery that runs the interior fridge ,lights etc. Should be a "leisure battery "which I understand is different to a starter battery,so does anyone have any ideas why MBhave fitted 2starter batteries in the Marco Polo or is it just mine?