RENNtech ECU Hand Held Tuner | HHT | CLS 63 AMG | C219 | 534HP/485LB-FT| 6.3L N/A | M156 | MY2007-2011 mercedes-benz-gls-class--167---2020-present--gls-450-esr7245365 W222 | S-Class

W222 | S-Class

RENNtech ECU HHT (HandHeldTuner) for the 230 - SL 600

Power figures are calculated with a 16% drivetrain loss for AWD 9-speed vehicles

CLASS C COUPE' (C 204) 350 V6 Blue Efficiency [2 Filters Required] (HP: 306 | Year: 11 > )

CLK (C208) 430 [2 Filters Required] (HP: 279 | Year: 98 > 02)

RENNtech ECU Hand Held Tuner | HHT | CLS 63 AMG | C219 | 534HP/485LB-FT| 6.3L N/A | M156 | MY2007-2011 mercedes-benz-gls-class--167---2020-present--gls-450-esr7245365 W222 | S-ClassRENNtech ECU HHT (HandHeldTuner) for the 219 CLS 63 AMG. Up to 534HP and 485LB FT LB FT. Gains: +27HP & +20LB 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.