How important is manufacturer testing at the Nordschleife?

This is a question Dale Lomas from RSR Nürburg asked himself on his BridgeToGantry website. It’s a great read. I’ve included a small extract below: “But the importance of this 20.8 kilometre tarmac rollercoaster (whose infield section alone contains four complete villages and a population of nearly 2500) runs deeper than it being a summer […]