Hello we have a classic car, Daimer 710 year 1968 with which the foot brake pedal unfortunately into the empty kick. It everything worked wonderfully, was in May 2018 at the TÜV without defects, drove the whole summer imm again. Last drive was even with trailer incl two-circuit brake system on the trailer. Then he stood a week in the garage and when I wanted to drive again, the foot brake did not work any more. There are 8 bar air on the system and the hand brake works without problems. ß someone what it is? Thank you very much