So Mercedes-Benz worked with AMG in Germany—it did not yet own the company—as well as Renntech, a Florida tuner (founded by the former North American director of AMG) on a $115,000 overhaul to ...

The good people at Renntech managed to get their hands on a Mercedes-Benz SLR, and quickly set to nudging the power to obscene levels. Behold what could very possibly be the world's quickest ...

Mercedes is showing the ultimate customization capability of its Sprinter Chassis Cab models with this Extreme concept, designed by the folks at Renntech. Okay, maybe I'm crazy. But what's not to ...

US Mercedes specialist Renntech has created a 144bhp upgrade for the Mercedes SL65 Black. The ‘Renntech Performance Package 1’ uses a revised ECU, dual intercoolers for the bi-turbo V12 and a ...

The car can complete the quarter-mile in 9.9 seconds at 139 mph. Renntech has a new upgrade for the Mercedes-AMG GT63 4-Door Coupe. It’s called the RIIX (arr-three-ex), and it combines the ...