RENNtech ECU Upgrade | GLE 400 | X166 | 392HP/432LB-FT | 3.0L BiTurbo V6 | M276 porsche-macan-turbo--2015-2021--esr8709534 Up to 670HP and 840LB-FT

Up to 670HP and 840LB-FT

Our proprietary ECU upgrade for the Mercedes M157 engine offers huge gains in performance across the entire RPM range without sacrificing around-town comfort or daily driver reliability

With the proprietary RENNtech ECU+ Tuning the C205 - C 63 AMG Coupe gains up to +56 HP and +107 LB-FT

RENNtech ECU Upgrade for 211 - E 550

8L V12 Engine) Stock Performance:

RENNtech ECU Upgrade | GLE 400 | X166 | 392HP/432LB-FT | 3.0L BiTurbo V6 | M276 porsche-macan-turbo--2015-2021--esr8709534 Up to 670HP and 840LB-FTRENNtech ECU Upgrade for 166 GLE 400 BiTurbo 4 MATIC SUV. Up to 392HP and 432LB FT. Gains: +63HP & +78LB FT RENNtech M276 Biturbo ECU Upgrades are TV approved! 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