RENNtech ECU+ Upgrade | W212 | E 550 | 540HP / 705 LB-FT | 4.7L V8 BiTurbo | M278 | MY2014-2016 mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 Rated by RENNtech (peak @crank):

Rated by RENNtech (peak @crank):              258 HP @ 3

38 sec 118 mph *If not otherwise noted

11 mph W222 - AMG S63 R1 / R2 Package w/Launch Control 3

ML 63 (164) Stock Performance:

Titanium bolts are used to mount the Strut Brace to the top of the strut towers

RENNtech ECU+ Upgrade | W212 | E 550 | 540HP / 705 LB-FT | 4.7L V8 BiTurbo | M278 | MY2014-2016 mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 Rated by RENNtech (peak @crank):ECU+ Upgrade 540HP 705LB FT Gains: +105HP +262LB 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