Look at your rear view mirror. On the top middle portion of the reflective glass there is a sensor, that is another sign you have the dimming option. Another test is to turn your cabin lights on and the rear view mirror will catch the light and activate the dimming. I believe you have to have the lights on auto or normal settings for the dimming to work as well.
I don't see why the angle reverse would be an option. Seems like that would be a given option with the car.