RENNtech Intermediate ECU Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 mercedes-benz-clk-class--209---2004-2010--clk-350-esr3437914 The maximum power number reached

The maximum power number reached with the RENNtech ECU Plus Upgrade for the W205 - C 43 AMG Sedan is 416 HP and 460 LB-FT

The Lathe Grooved backpad process feature is also standard on our Performance Series wheels

CLASS C (W 204) 280 V6 [2 Filters Required] (HP: 231 | Year: 07 > 09)

CLASS E (W 211) 63 AMG [2 Filters Required] (HP: 514 | Year: 06 > 09)

RENNtech Intermediate ECU Upgrade | X253 | GLC63 AMG (S) 4MATIC+ SUV | 574 HP/612LB-FT | 4.0L V8 BiTurbo | M177 | MY2016-2022 mercedes-benz-clk-class--209---2004-2010--clk-350-esr3437914 The maximum power number reachedIntermediate ECU Upgrade GLC 63 AMG S and non S Up to 574 HP 612 LB FT Gains: +48 HP & +80 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