Did you drive it in the Model S? I'm guessing 9 hours driving + 4 hourly stops.
Apologies. I wrote "Also, on the same autobahn", which is naturally understood as "on the same route", but I should have written something like "Also, on the German autobahn", because I only drove the Model S on a stretch of the aforementioned, no-limit(*) autobahn, where I got 200km out of a complete discharge of the P85+ (returning to the starting point with a "charge now").
Exactly because of the autobahn, I am not surprised of reports that Tesla is not selling that well in Germany. Admittedly, the aforementioned sustained average speed of 180 km/h is rarely obtained, but an average of 150 km/h can quite often be sustained even in cars with a lower top speed, such as a standard Audi A4. And this makes a difference for distances where a Model S has to be (super)charged multiple times (by the guess of loco to about 75 km/h, i.e. only half the speed of a traditional diesel car).
By the same logic, I can also understand that Tesla sells well in Norway, where a lot of the roads are mountain roads with low speed limits and lots of curves where the Model S can really excel. (I am aware that the Norwegian government supports EVs with various attractive incentives, but I think that is only part of the explanation. You see f.ex. a lot of Teslas far from Oslo, far from the reserved bus-lanes that an EV may use). Basically (by this reasoning), any country that imposes a low speed limit implicitly supports Tesla, and I guess the USA qualifies there (along with Switzerland and their pesky 120 km/h limit, which is very expensive to forget about).
(*) The speed on the German autobahn is actually limited in several ways, including:
A) The law _recommends_ a maximum speed of 130 km/h, meaning that if you choose to drive faster than that and get involved in an accident, you _will_ get part of (if not all) the blame, because you chose to go against this recommendation.
B) The remaining relevant parts of the traffic laws still apply, so a driver needs to maintain proper distance (which becomes increasingly demanding because the brake length grows with the square of the speed), take into account driving conditions such as the weather, tires have to have sufficient speed-rating, etc.
C) Lots of autobahn stretches actually have specific speed limits due to a variety of reasons such as: poor maintenance state of the road surface, ongoing maintenance, noise consideration (around cities), the time of the day, precipitation or fog, low temperatures, high temperatures, a bridge with potential for side wind or (in winter) a steel construction that may freeze sooner than normal roads, dynamically set speed limits based on traffic density, oil spills, dropped goods, wrong-way driving, accidents, etc.