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 Current Consumption: 30mA (60mA while

Current Consumption: 30mA (60mA while plugged in to PC/Tablet)

Please Note: Vehicles without factory fixed rear wing will require MB OEM wing base and Spoiler Deactivation module

SL 65 (R231) Stock Performance:

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

optimizing air-to-fuel ratios

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 Current Consumption: 30mA (60mA whileECU 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