RENNtech ECU+ Upgrade | C253 | GLC 43 AMG | Coupe | 416 HP / 460 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016+ audi-s7--4g---2012-2018--4-0l-v8-twinturbo-esr9168828 M176/177/178

M176/177/178

Pre-preg is widely known as the finest process in carbon fiber manufacturing and has been used for aerospace and military applications because of its superior consistency in durability

For later model years (2021 – 2023)  RT App is required

SL 600 (R230) Stock Performance:

Rated by RENNtech:               536 HP @ 6

RENNtech ECU+ Upgrade | C253 | GLC 43 AMG | Coupe | 416 HP / 460 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016+ audi-s7--4g---2012-2018--4-0l-v8-twinturbo-esr9168828 M176/177/178The RENNtech ECU Plus Upgrade brings the GLC 43 AMG SUV up to 416 HP and 460 LB FT Gains: +41 HP and +62 LB 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.