RENNtech ECU Upgrade | C216 | CL 550 | 500HP / 625 LB-FT | 4.7L V8 BiTurbo | M278 | MY2011-2014 mercedes-benz-c-class--205-sedan---2015-2022--c-350e-plug-in-hybrid-esr8664468 We have found the M178

We have found the M178 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz

RENNtech ECU Upgrade for 212 - E 350

The RENNtech lock-up clutch upgrade uses a multi-element clutch upgrade with additional layer of friction material between the clutch plate

CLASS E (W 212) 500 Blue Efficiency [2 Filters Required] (HP: 408 | Year: 11 > )

Options: Valve Stems Upgrade Lug Bolts Titanium Included TPMS Upgrade Center Caps Design V1 | Design V2 Tires Mounted and Balanced  Available: Track or Street spec

RENNtech ECU Upgrade | C216 | CL 550 | 500HP / 625 LB-FT | 4.7L V8 BiTurbo | M278 | MY2011-2014 mercedes-benz-c-class--205-sedan---2015-2022--c-350e-plug-in-hybrid-esr8664468 We have found the M178ECU Upgrade 500HP 625LB FT Gains: +52HP +87LB 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