The car on the ramp on the rev counter when you turn the ignition on is giving you the mileage until its next service. My
mcs does this everytime I start the car then reverts back to mph reading on starting the car, its a reference point for servicing as the dealers will only service the car with less than 1000 miles to go or -1000 miles over the set mileage, the high battery discharge light I dont know.