RENNtech ECU Upgrade | GL 550 | X166 | 480HP / 605LB-FT | 4.7L BiTurbo | M278 Engine mercedes-benz-gle-class--166---2016-2020--gle-63-amg-esr4679580 optimizing air-to-fuel ratios

optimizing air-to-fuel ratios

SL 65 (R231) Stock Performance:

For extra convenience

The RENNtech Sound + Style Package for the W222 S63 AMG Sedan brings the perfect combination of styling and sound upgrade to one of Mercedes's most dynamic cars

and enhanced overall driving dynamics without the need for a complete coilover conversion

RENNtech ECU Upgrade | GL 550 | X166 | 480HP / 605LB-FT | 4.7L BiTurbo | M278 Engine mercedes-benz-gle-class--166---2016-2020--gle-63-amg-esr4679580 optimizing air-to-fuel ratiosECU 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