Got the Mille out today only to find that the rear brake pedal is going all the way down and nothing is happening. After bleeding the system for a while using the methods described on this forum I managed to get the pedal back but another problem arose. If I push the pedal down I get pressure then get a hiss and the pressure drops and the pedal goes right down. Almost like the master cylinder can't hold the required pressure. After a call to the dealer to price up a master cylinder I picked myself up off the floor and thought I'd ask on here and ideas before I burn it.