RENNtech ECU Upgrade | W212 | E 550 | 480HP / 605 LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2013 mercedes-benz-gl-class--166---2013-2016--gl-550-biturbo-4matic-esr9025016 75 V8 T Mulliner (HP:

75 V8 T Mulliner (HP: 426 | Year: 99>)

Our performance package includes our proprietary ECU tune in addition to our full carbon fiber airbox for a gain of +27 HP and +30 TQ over stock

C217 - S 63 AMG Coupe

2010-up 997 DFI (3

Rear RENNtech rotor weight – 15

RENNtech ECU Upgrade | W212 | E 550 | 480HP / 605 LB-FT | 4.7L V8 BiTurbo | M278 | MY2012-2013 mercedes-benz-gl-class--166---2013-2016--gl-550-biturbo-4matic-esr9025016 75 V8 T Mulliner (HP:ECU 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