The Isdera Commendatore "Silver Arrow" C112i, seen in Bern.
In 1999, Isdera produced a fully functional prototype called the Silver Arrow C112i. The vehicle shared the same body and chassis as the 1993 Commendatore 112i, but was powered by a Mercedes-Benz, 611 hp (456 kW) V12. The car's top speed was recorded at 230 mph (370 km/h). At the time of its introduction, the Silver Arrow was the only car in the world to feature an automatically lifting airbrake.
The Silver Arrow prototype was offered for sale on eBay in October 2005 for US$3 million, but was not sold. At the time of the auction, the car was located in Switzerland.