RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2014 mercedes-benz-e-class-sedan--212---2014-2016--e550-biturbo-esr8684531 the entire power and torque

the entire power and torque curve is shifted upward delivering +50 HP +74 LB-FT in the Mercedes-Benz M256 3

Performance testing shows that the OEM air boxes on the M177 V8 Bi Turbo engine become a constraint when power output is increased through performance ECU software

Fuel System upgrade

the OEM Wing Base and Spoiler Deactivation module are required

RENNtech performance software unleashes your SMART's true potential

RENNtech ECU Upgrade | C218 | CLS 550 | 480HP / 605LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2014 mercedes-benz-e-class-sedan--212---2014-2016--e550-biturbo-esr8684531 the entire power and torqueECU Upgrade 480HP 605LB FT Gains: +45HP +162TQ 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