Hello everyone, I hope again for your expert opinion. Unfortunately, with the present error, my KfZ-ler can not help me great further, because the error is probably not reproducible and probably absolutely performance effective with him in the works on the brake test stand does not occur. It is also a little difficult to explain. So: I had the brake lines remake by him a month ago, after a line after a full braking at a rusted place ” Since the repair I have the feeling that the brake pedal can be kicked much easier and the braking effect also occurs much later and in my feeling it could be “sufficient” but everything is far from optimal. Every now and then (about 50km) it makes a short beating/knocking noise from the direction of the rear axle and then the braking effect and the pedal resistance and distance is just as much as before the braking system fails. After a few km k I can push the pedal back to the ground without much resistance. Since the KfZ-ler probably doesn’t recognize the error or not perceive it as such, I would like to know from you whether you have an experience, what that could be and how I can fix it. Maybe I can also point him to the error so that he knows what he needs to look at. MfG and many thanks in advance Chris