RENNtech ECU Upgrade | C253 | GLC 43 AMG | Coupe | 400 HP / 440 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016-2022 mercedes-benz-c-class--205-sedan---2015-2022--c-43-amg-esr5749443 Our proprietary ECU upgrade for

Our proprietary ECU upgrade for the Mercedes M276 engine offers huge gains in performance across the entire RPM range without sacrificing around-town comfort or daily driver reliability

0 (HP: 306 | Year: 11 > )

yet highly functional aesthetic

brushed metal

the entire power and torque curve is shifted upward delivering +80 HP +101 LB-FT in the Mercedes-Benz M176 4

RENNtech ECU Upgrade | C253 | GLC 43 AMG | Coupe | 400 HP / 440 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016-2022 mercedes-benz-c-class--205-sedan---2015-2022--c-43-amg-esr5749443 Our proprietary ECU upgrade forThe RENNtech ECU upgrade brings the GLC 43 AMG Coupe up to 400 HP and 440 LB FT Gains: +25 HP and +42 LB FT. RENNtech tuning products are certified to meet CARB standards in all 50 States. 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