There would be a very simple first step here. Stop calling it Autopilot. And stop promoting anything self driving near it
To tell people that you have to pay attention 100% of the time your don't need any of the details. You have stated that over and over again, it just doesn't do enough, because a few weeks later people have forgotten all these statements and new customers or people who just like the car, but don't follow the company might never even have read them.
Except S-Class sales went up in 2013 and skyrocketed in 2014. Overall it seems like the introduction of a new model by Mercedes had far more effect than the Model S and then it fell off because it got older. 7-Series sales were probably also mostly affected by an ageing car.
He should have used the E-Class/5-Series/A6 segment, not one below. Then the price difference after incentives is a bit over 10k. While going up market the difference can be more than twice that much.
https://youtu.be/csdlHuUTrds?t=1549