RENNtech ECU+ Upgrade | C253 | GLC 43 AMG | Coupe | 416 HP / 460 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016+ ecu 2 rocker panel extensions and

2 rocker panel extensions and 2 rear fascia trim pieces

CLASS G (W 463) 55 AMG V8 SW LONG [2 Filters Required] (HP: 354 | Year: 02 > 04)

RENNtech ECU Upgrade for 166 - GLS 450 BiTurbo 4-MATIC

Rated by RENNtech:              601 HP @ 6

RENNtech ECU+ Upgrade | C253 | GLC 43 AMG | Coupe | 416 HP / 460 LB-FT | M276 | 3.0L V6 BiTurbo | MY2016+ ecu 2 rocker panel extensions andThe 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.