I think it is by default. I haven't found a way to switch it and it is built as a shunter so shouldn't need anything higher. Actually I haven't found the safety systems switch on the BR 363 V 60 - I normally just look around, give up, and use Ctrl + Shift + Enter
No, it's permanently in mode U. The SIFA fuse is dead in front of you around knee height of the driver. The PZB fuse is in a little plastic box you need to open; right above the main control desk.
SiFa = Shift + Enter PZB and LZB = Ctrl + Enter SiFa Acknowledge = Q PZB Acknowledge = Page Down PZB Release = End PZB Override = Delete Does any of this help?