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 5 Turbo S [2 Filters

5 Turbo S [2 Filters Required] (HP: 500 | Year: 04 > 06)

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

the OEM Wing Base and Spoiler Deactivation module are required

Gains: +16HP & +20LB-FT

ML 63 (164) Stock Performance:

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 5 Turbo S [2 FiltersECU+ 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