BMW 535D
few days ago i was driving along the motorway and my brakes completely went, no pressure in the pedal, foot went to the floor, no braking whatsoever
so i took it to local garage and they said needed new rear calipers, discs, pads etc cos id lost a pad somewhere and the piston had popped out and was grinding against the disc so air had got into the system.
so ive just had 2 new calipers, 2 new discs, pads, flexi hoses and the likes and my pedal still feels very spongy like theres very little pressure behind it.
the garage have checked my master cylinder and drained the system and they say thats ok, doesnt need a new one
the bloke reckons i should choc my brake pedal down and leave it for the nite to make sure all the air escapes from the system
so ive wedged it down and am leaving it for the nite.
but if this doesnt solve it what could it be?