Keith Brantley's 2009 Mercedes-Benz C63 AMG with an MHP stage 3 package claims to have stolen the "title" of world's quickest (production, tuned) Mercedes-Benz with a 10.41-second quarter-mile run this weekend, besting the RENNTech Mercedes C63's time of 11.58.

While it feels like there's another faster Mercedes AMG product out there somewhere, we can't think of a faster C63 from any tuner. Granted, how many people are hooking up their AMG Benz with 125-shot nitrous?

More to the point, how ridiculous is any "title" of world's quickest tuned version of a vehicle?