RENNtech ECU+ Upgrade | W222 | S63 AMG S 4MATIC+ | 740 HP / 806 LB-FT | 4.0L V8 BiTurbo | M177 | MY2018-2020 mercedes-benz-glc-class-coupe--253---2016-present--glc-63-amg-esr1091906 Rated by RENNtech: 669 HP

Rated by RENNtech:               669 HP @ 5

With the proprietary RENNtech ECU Plus Upgrade the C205 - C 43 AMG Coupe gains up to +41 HP and +62 LB-FT

GLC 43 AMG SUV (X253 | M276 | 3

Rated by Mercedes-Benz:      518 HP @ 5

All this while still maintaining the same approach angle as the OE front fascia so the RENNtech splitter retains the same clearance for parking stops and steep driveways

RENNtech ECU+ Upgrade | W222 | S63 AMG S 4MATIC+ | 740 HP / 806 LB-FT | 4.0L V8 BiTurbo | M177 | MY2018-2020 mercedes-benz-glc-class-coupe--253---2016-present--glc-63-amg-esr1091906 Rated by RENNtech: 669 HPECU+ Upgrade Up to 740 HP 806 LB FT Gains: +87 HP & +44 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 delivers the file you