The Class 101 had a dead man’s handle instead of the newer DSD. It’s basically the power handle which needed to be constantly held down when in motion. It is simulated in the game to be pressed down constantly when power is applied so no action is required on the player’s part to enable it.
The AWS switch in the Class 101 is under the secondman's seat, near the door to the passenger compartment, you may have to fumble around a bit to find it.
Yes, but every time you return it to B1 or Stop, it pops up and the alarm goes off until you manually cancel it.