I'm not sure any more. If there isn't a switch on the left side of the steering wheel, you may have to go to the Information center by using the i button on the steering wheel. Scroll through the menu and look for safety features. Refer to the owner's manual for specific direction.
It did not come with the base model. The Collision Mitigation Braking System (CMBS) was available on the Advanced Package, both the 4 cylinder and V-6. I'm referring to the 2017 model year which I sold at the time. I have since left the automotive sales business, so I'm not sure about the newer models. Take a look at Acura's web site and they can show you a comparison of features of each the trim level. Thank you for your question!
