Hi can anybody help iv a 2002 130 tdi passat iv notice the last fe months some times when i would brake the pedal would go hard and i would have to pull up the hand brake to stop the car then after half hour or so the pedal would be ok again and braking back to normal but 3 or 4 weeks later it would happen again this has been going on for a while no iv asked the garage about the problem but nobody has a clue whats wrong iv bled the brakes but there is't any air trapped can someone help please im so nervous driving the car it could happen at anytime