1st Gen. 1 Series (2004-2013 | E81, E82, E87, E88)
Hi all,
At the MOT test centre, after the roller brake test was complete, I was surprised to see on the summary page that were readings for a "Secondary Brake". If I recall correctly, there were readings under 4 columns titled, in order, "Service Brake", "Secondary Brake", "Imbalance" and...