If i play with Sifa on on the BR 401 and i forget to press the sifa button in time i get a e brake and i cant release it any more.
To release any emergency brake application on the BR 401, you need to press the "HL füllen" ("fill BP") button next to the brake pipe pressure gauge. This is intentional and reflects the real behaviour of the train.
It would be nice if this was written somewhere in the instructions, and not to encounter it on the route and not to know what to do) Thanks.