RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2018 audi-a8--d3---2002-2009--4-2-l-v8-fsi-esr7551102 Used together

Used together

countless hours of in-house Research & Development

The RENNtech ECU Plus Upgrade brings the C 43 AMG Sedan up to 416 HP and 460 LB-FT | Gains: +41 HP and +62 LB-FT

it will not return

997 GT3 RS 3

RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2015-2018 audi-a8--d3---2002-2009--4-2-l-v8-fsi-esr7551102 Used togetherECU Upgrade 480HP 605LB FT Gains: +45HP 162Lb 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