Mercedes-AMG S63 E Performance (W223) | RENNtech | RPM ECU Upgrade | 890 HP and 1062 LB-FT TQ mercedes-benz-c-class--204-sedan---2008-2014--c-320-cdi-esr4861286 *Before Placing Order

*Before Placing Order

Our proprietary ECU upgrade for the Mercedes M137 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

Crank Performance Numbers are calculated with a 20% Drivetrain loss on G-Wagon models

After plugging the HSM into the OBD2 port

A45 AMG | MY2019+

Mercedes-AMG S63 E Performance (W223) | RENNtech | RPM ECU Upgrade | 890 HP and 1062 LB-FT TQ mercedes-benz-c-class--204-sedan---2008-2014--c-320-cdi-esr4861286 *Before Placing OrderRENNtech Power Module ECU Upgrade for Mercedes AMG S63 E Performance (W223) M177 w Electric Drive 890 HP and 1062 LB FT TQ RENNtech Power Module (RPM) ECU tune increases horsepower and torque across the entire power band. By modifying ignition timing, throttle mapping, optimizing air to fuel ratios of the 4. 0 liter BiTurbo V8 engine (M177) found in the Mercedes AMG S63 E Performance vehicles. The RPM is contained in a CNC machined 6061 aluminum case