Your question is already answered before.
Shilka has 6 operation modes, and the sim will simulate two of them (mode 1, and 3)
1. Aerial target tracking with RPK in three coordinates
2. Aerial or ground target tracking with optics, and RPK is measuring range only
3. Memory mode. (tracking target with last known parameters)
4. Aerial target tracking with optics only
5. Ground target tracking with optics only
6. Emergency mode (full manual target tracking )
As for auto fire; my guess is no, for security reasons there should be no auto fire option, to avoid friendly fire accidents like one at M247 Sergeant York demo.
Commander uses pistol grip like fire trigger.
