RENNtech ECU Upgrade | C253 | GLC 43 AMG | Coupe | 400 HP / 440 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016-2022 mercedes-benz-g-class--463---1990-2018--g-55-amg-esr4572509 The complete system needs no

The complete system needs no re-programming of the ECU because it doesn’t trigger any warning lights

Fitment: Mercedes-Benz AMG GLS (167 -chassis)

Complete the look with a set of exquisite 105 mm tailpipes in titanium or carbon fibre

SEC/CL 500 (C140)

RENNtech ECU Upgrade | C253 | GLC 43 AMG | Coupe | 400 HP / 440 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016-2022 mercedes-benz-g-class--463---1990-2018--g-55-amg-esr4572509 The complete system needs noThe 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