So for me - a reliable autopilot for the Autobahn is much more important than the top speed.
1. Tesla autopilot has a disengage rate of 182 in 550 miles. This cannot be safe in anyway for any kind of driving http://blog.caranddriver.com/in-the-self-driving-race-waymo-...
2. Apart from the fatalities there have been many other accidents with Tesla https://arstechnica.com/cars/2016/05/another-driver-says-tes...
http://grist.org/business-technology/whats-the-point-of-self...
3. https://www.theguardian.com/technology/2017/apr/03/the-custo...
4. Check YouTube for any number of autopilot crashes