RENNtech ECU+ Upgrade | S212 | E 63 AMG | Wagon | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 mercedes-benz-gls-class--166---2017-2019--gls-450-esr2288101 S550 (W221 | MY2012-13 |
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RENNtech ECU+ Upgrade | S212 | E 63 AMG | Wagon | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo | MY2012-13 mercedes-benz-gls-class--166---2017-2019--gls-450-esr2288101 S550 (W221 | MY2012-13 |ECU+ Upgrade 669HP 734TQ Gains: +119HP +190TQ 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 directly to the ECU. Programming takes only a few minutes and the vehicle can be reflashed
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