2018 Audi Q8 4x4 auto service brake testing procedure

Like most 4x4 Audis , which have a on demand active coupler fitted that can tolerate RBT conditions .

With the vehicle in the rollers front axle

1 engine off ,ignition on
2 ensure any hill assist is turned off and apply the park brake
3 run rollers together or single and apply the footbrake and note the readings
4 you may have to chock the rear wheels as the brake efforts are very strong

Rear axle

Same procedure As front axle without applying the park brake of course .