Renntech 6.3 bi-turbo tune

Renntech's ECU upgrade for the Mercedes M157 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability. This ECU tune offers the biggest performance gains on the market; increasing performance from 556 HP and 550 lb/ft torque, to an astonishing 669 HP and 734 lb/ft at the crank! This allows the CLS 63 to run the quarter mile in an impressive 11.37 seconds at 125.01 mph with 0-60 mph coming in a mere 3.4 seconds.