No one expected the pair of 2010 Mercedes Benz prototypes to turn up on the very first day of the Fireball Run. The two prototypes SLK from Mercedes was not even supposed to be a part of the event. The reason for them being close to the place was therefore not very much clear.
Spotted by Joel and Nelson from High Gear Media, the duo saw the two prototypes as they were taking in gas at a filling station in Las Vegas. Before the cars could speed away, Joel and Nelson managed to click some snaps. The engineers behind the wheel, and German by nationality were not very happy about the car being snapped by the camera lens. This was evident from the facial expression that they contorted whilst they sped away.
Source: motorauthority