The Mercedes-Benz CLK GTR was a GT1-class race car developed for the FIA GT Championship in 1997, featuring a 6.0L naturally aspirated V12 producing 600+ hp. It was later adapted into the CLK LM for endurance racing and the CLR for the 1999 Le Mans 24 Hours. The CLR, however, became infamous for its aerodynamic instability at high speeds. The car’s low, long-nose design and aggressive underbody aero created excessive lift, especially over crests like the Mulsanne Straight at Le Mans. In 1999, Mark Webber’s CLR flipped twice during practice and warm-up, followed by Peter Dumbreck’s CLR flipping spectacularly mid-race, launching into the trees at over 200 MPH (321.86 KMH). The incidents were attributed to insufficient front-end downforce and aerodynamic instability, particularly in ground-effect cars at high speeds. Mercedes immediately withdrew from the race and exited top-tier endurance racing for years, making the CLR's dramatic flight a cautionary tale in motorsport aerodynamics.