The guys over at RENNtech are famous for giving Mercedes vehicles the power deserve, most notible tuning the SLR 722 series to actually get 722hp. This time, they have taken the already powerful C63 with it’s 451hp and put it on steriods. The RENNtech software produces 548 peak horsepower and 510 lb-ft of torque. As they say, they began with the ECU2 high-performance software. Much more than a (relatively) simple de-restriction, this flavor of RENNtech’s software optimizes every aspect of engine performance, building massive amounts of torque across the low-to-mid rpm range and boosting the C63′s top speed to 187 mph.

RENNtech sharpens the C63′s handling reflexes with a fully adjustable sport suspension and adjustable front and rear camber bushings. This allows customers to “dial-in” ride height and shock damping while the camber bushings help maintain proper camber and alignment for maximum grip