The 67-year-old Naruse apparently collided with a test car driven by two BMW test drivers outside the 'Ring. The BMW drivers were injured, with one reported to be in critical condition.

The LF-A supercar was revealed in production trim at the 2009 Tokyo motor show and is expected to go into production late this year as a 2012 model. The company plans to build just 500 copies of the $375,000 cars over a 24-month period. The $70,000 Nürburgring option will be offered on 50 cars, featuring a 562-hp version of the car's 4.8-liter V10 and other exclusive features.