Renting a track car for use on the Nürburgring Nordschleife makes a huge amount of sense. The cars are likely to be prepared with uprated components and enhanced safety equipment, and will be properly insured for the required use, whether it be on one of our Nürburgring track days, general public driving on the Nordschleife (Touristenfahrten) or use in the surrounding area.
By no means exhaustive, here are the companies I trust through personal experience.
Here at Destination Nürburgring I have a long and proud association with the Heide, Theo and the team at RentRaceCar. They were one of the first companies in the area to start renting specifically prepared cars and have grown their fleet in both quantity and quality over the years. Their reputation is so good, that they've recently been selected as an official partner of the Nürburgring themselves. They also operate their own official Ring Taxi and hotel facility. A full list of their fleet can be found here.
One of the Eifel's great characters, Jaco Velders provides cars you can rent for Nurburgring track days and races. He is also well known for providing all your training requirements if you're looking to gain your DMSB German National A race licence. I've known him a long time and he's always been a fair, straight, humourous guy who I wholeheartedly endorse. Call his team on +49 2691 933114 or contact him via his website www.jacos-paddock.co.uk