RENNtech ECU+ Upgrade | X166 | GLS63 AMG | SUV | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo mercedes-benz-glc-class--253---2016-present--glc-43-amg-esr6444157 and refined which evolved into

and refined which evolved into our final and optimal solution

Mercedes-Benz SL R232

CLASS G (W 463) 63 AMG [2 Filters Required] (HP: 544 | Year: 10 > )

CLASS C (W 204) 300 [2 Filters Required] (HP: 231 | Year: 09 >)

GLC 43 AMG Coupe (C253 | M276 | 3

RENNtech ECU+ Upgrade | X166 | GLS63 AMG | SUV | 669 HP / 734 LB-FT | M157 | 5.5L V8 BiTurbo mercedes-benz-glc-class--253---2016-present--glc-43-amg-esr6444157 and refined which evolved intoECU+ Upgrade Up to 669HP 734LB FT Gains: +64HP & +108LB 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. Programming takes only a few minutes and the vehicle can