RENNtech ECU Upgrade | C217 | S 550 Coupé | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2017 sale-person Utilizes OEM electronic actuators

Utilizes OEM electronic actuators

These shocks are specifically developed by RENNtech to improve the On and Off Road handling and performance of the G-Class(MY 1990 – 2018)

Our proprietary ECU upgrade for the Mercedes M277 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

the C238 - E450 gains up to +53 HP and +78 LB-FT

Fits all vehicles of the AMG GT family MY2015+

RENNtech ECU Upgrade | C217 | S 550 Coupé | 500HP / 625LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2017 sale-person Utilizes OEM electronic actuatorsECU Upgrade 500HP 625LB FT Gains: +26HP +59LB FT Our intermediate level ECU upgrade for the Mercedes M278 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas and countries with extreme altitudes, temperatures or