1. Insert master key
2. Reverser to neutral
3. Cancel AWS alarm
4. Brake to full service
5. Start engine - button in front of combined throttle/brake
6. Headlights to day - switch upper left panel
7. AWS - switch on wall behind driver
8. DSD, TPWS, Vigilance - top row of rotary switches on left wall panel`

https://en.wikipedia.org/wiki/British_Rail_Class_166