- Change the currently toggled Healing Aura to an automatic one: it turns on if the vehicle is stationary and turns off when it's in motion.
- Add the Handbrake ability from the halftracks.
The Ambulance works in exactly the same way: it heals and reinforces when stationary in your territory.
However, implementing it this way allows you to command it with the shift-queue, making it a little nicer to use,