I am in the process of helping a friend who has a 92 400E also, and is trying to install stainless steel brake lines. He ordered them from Bekkers and when he went to thread the male end into the caliper, it felt as though the bottom of the male end did not touch the inside bottom of the caliper. Doesn't the male end need to come in contact with the inside bottom of the caliper in order to seal so there is no leak? It appears as though the threads are correct, but the male end doesn't seem to be long enough.
Should we hold off installation and try and get another pair or is this how they all match up? Any ideas on another supplier of ss brake lines?
Any immediate feedback is appreciated, as the car is in parts!