The interior is the black alloy, I think they call it. The dashboard and flooring is black, while the seats are 'alloy', i.e., light gray. I really think it is pretty nice actually. The 'craftmanship' on the upholstery seems top notch at this point.
As for the break assist, I don't know yet. I can tell you that when I pull into my garage, the 'parking assist' goes haywire. There is very little clearance on the 'wall edge' when I enter the garage, i.e., the front right bumper comes very close to hitting the corner of the garage opening. Then, As I pull forward, the front sensors pick up the outside refrigerator we have, and which I get to with 8 inches or so... and so it goes all the way to 'three bars', with full 'tone' . It's a good thing that I have mastered the entire maneuver with my last minivan, so that I only have to suffer for a few seconds. I wish there was a way to fine tune the sensitivity, but I have not found that yet, and besides, in the 'right' circumstances it will protect me.
The 'Lane departure' thing is quite amazing actually, and truly works. I tested it by driving out of my lane a bit (nobody near me on the road) and then taking my hands off the wheel. It beeped, lit up and then took control of the wheel, putting me back into the center of my Lane and keeping me there, and then telling me to take hold of the wheel. Very smart. The only downside of the feature is that when driving around some places, I purposely 'cut corners' at times, and the car 'fights' me when doing so. It is a 'small' fight, but notable none the less. All in all, I am very glad I have this feature.