Rear Wiper

[bigfoot125]

Hi there

a few questions re this model

how many mpg will this do

how do you check the miles on clock,it seems to be a button to reset counter and the mileage shows 2k, how can i see the actual total miles

and finally the biggest issue, rear wiper comes on without me using the front wiper switch, started yesterday and goes off every 20 seconds, is this a faulty connection

any help is appreciated

thanks