RENNtech ECU+ Upgrade | C253 | GLC63 (S) AMG 4MATIC+ Coupe | 601 HP/644LB-FT | 4.0L V8 BiTurbo | M177 | MY2016+ audi-s5--b9-5---2020-2024--3-0l-v6-tfsi-esr2469158 and was tested and perfected

and was tested and perfected on the Nürbugring

Rated by RENNtech:               435 HP @ 5

523 hp @ 4

Ghibli (M157)

To reach the maximum power level

RENNtech ECU+ Upgrade | C253 | GLC63 (S) AMG 4MATIC+ Coupe | 601 HP/644LB-FT | 4.0L V8 BiTurbo | M177 | MY2016+ audi-s5--b9-5---2020-2024--3-0l-v6-tfsi-esr2469158 and was tested and perfectedECU+ Upgrade GLC 63 AMG S and non S Up to 601 HP 644 LB FT Gains: +75 HP & +113 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 into the OBD2 port and