RENNtech ECU+ Upgrade | W222 | S 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 | MY2014-2017 mercedes-benz-cl-class--215---2001-2006--cl-600--2000-2002--esr9028642 Mercedes-AMG 450 | M276 |

Mercedes-AMG 450 | M276 | 3

222 - S-Sedan

CLASS E COUPE' (C 207) 350 V6 Blue Efficiency (HP: 306 | Year: 11 >)

Rated by RENNtech:                416 HP @ 5

Continental GT Supersport (MY2012-18)

RENNtech ECU+ Upgrade | W222 | S 550 | 540HP / 705LB-FT | 4.7L V8 BiTurbo | M278 | MY2014-2017 mercedes-benz-cl-class--215---2001-2006--cl-600--2000-2002--esr9028642 Mercedes-AMG 450 | M276 |ECU+ Upgrade 540HP 705LB FT Gains: +66HP +139LB FT 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