I keep meaning to compile a list of cars with pointed radiators, but somehow I never get round to it.
But I think this car is a Presto. I'm not sure which one, but it could be the Luxus model from about 1912 or 1913.
It's standing on the roof of the Presto-Werke in Chemnitz, Saxony. Presto began by making bicycles, then built small numbers of Delahayes under licence, before producing their own designs. Financial problems in the 1920s led to various mergers, and they were taken over in 1927 by the NAG group (Nationale Automobil-Gesellschaft), based in Berlin.
The Chemnitz factory was sold to Auto-Union in about 1934. It was badly damaged during WW2, and Auto-Union production was eventually relocated to Ingolstadt in Bavaria.