RENNtech ECU+ Upgrade | W222 | S 500 Maybach | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 | MY2014-2017 mercedes-benz-gle-class--166---2016-2020--gle-400-esr4461593 448awhp @ 5

RENNtech ECU+ Upgrade | W222 | S 500 Maybach | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 | MY2014-2017 mercedes-benz-gle-class--166---2016-2020--gle-400-esr4461593 448awhp @ 5ECU+ Upgrade 540HP 705LB FT Gains: +66HP +139LB FT RENNtech tuning products are certified to meet CARB standards in all 50 States. RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose

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