Friends are here on visit.
He was doing some cycling, returned, put his bike back in the car, closed the back door .... but left the key inside.
For whatever reasons (theft security), the car completely got locked seconds later.
Besides that they live 100 miles away: their second key got lost recently, and the new one wont arrive before next week.
So, we phoned the Volkswagen emergency hotline.
Someone will arrive shortly .... to bash a window, it seems