A beautiful location for the start of a race is this place in the Tarzanbocht. It is often busy, so be here on time and if there is already a lot of people, and you were on time, you can always ask nicely if you may make some photos at the start.
You are here dealing with a fence, you shoot through it or you need to bring a long staircase with you. The cars coming right at you, so try as much as possible to freeze the picture.
Do not go for too much zoom, so you only have asphalt and cars, but also show some of the surroundings. Think of the pitlane and grandstand. There is also a door with a camera man most of the time in front of it. If not, you have the possibility to take pictures here as well.