No one in Germany is going to destroy their own car industry just so the president of the EU can march around claiming he is 'punishing' the UK. It may be a bumpy ride, but we are in a very strong negotiating position to secure trade deals from the countries that matter in the EU.
Oh and that small matter of democracy that so many of you forget about - yes it is important that the UK is able to choose who lives here, who we trade with, and which laws we live by. The idea that we can't survive outside the EU is simply not true. We were told by the same organisations that we couldn't survive without the Euro, and look how that turned out.