I just received your vms 120 and am curious as to why the mileage on the vms and the coach do not match up.. the coach shows 4500 miles and the vms shows 3700... the day of the week on the calendar will not match with with the screen shows.. when I set the date/ day I say Tuesday but it shows Wenesday. also I am not getting an oil tempurature reading on the vms.. is this normal.. this is in a 06 Knight with a 330cummings thanks Tim