My 2011 A5 was supposed to be ready today to pick up. I called the dealership to check if it was still going to be ready by 5pm and they said "maybe" - they would have to finish a couple things and call me back.

The guy said because they changed the brakes (I had the rear calipers changed due to some cosmetic problems) that their guy was still busy doing programming for the odometer and stuff after he finished the road test?

What would need to be programmed because a mechanical part was changed?

Help me out here?