Servus beinand, I have a W123 300D Bj 1982 with automatic transmission and have overtaken the front brakes there. In other words, new pads, new discs and the brake calipers (ATE) equipped with new seals, dust sleeve and heat shield. This all went well so far, the brakes are mounted and the wheels also rotate. Now I have the problem that after the venting of the brake system (ventilation by pedal, rear right, rear left, front right, front left) the brake pedal s I thought I scraped the main brake cylinder and therefore installed a new one. But the problem remains the same. I’ve probably ventilated 5 times, but there’s no improvement. What I noticed, in my opinion, when the brake pedal is pedaled, very little brake fluid gets through. Bubbles haven’t been seen for a long time. What can it be about, that no pressure is built up? and no brake fluid from the storage tank and I can’t see any fluid leak on the pipes and saddles, so I assume that the system is tight. Thank you for your help.