RENNtech ECU Upgrade | W166 | ML 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 land-rover-range-rover--l405-lg---2013-2021--5-0l-supercharged-v8--aj133--esr2936963 remapping the ECU is mandatory

remapping the ECU is mandatory or optional Delete-R has to be installed

Phantom 2004 – 2022 (present)

Gains: Up to +164HP | +88LB-FT

We have found the new M256 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz

C 32 AMG (W203) Stock Performance:

RENNtech ECU Upgrade | W166 | ML 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 land-rover-range-rover--l405-lg---2013-2021--5-0l-supercharged-v8--aj133--esr2936963 remapping the ECU is mandatoryECU Upgrade 480HP 605LB FT Gains: +32HP +67LB 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