RENNtech ECU Hand Held Tuner | HHT | CL 63 AMG | C216 | 534HP/485 LB-FT | 6.3L N/A | M156 | MY2008-2010 audi-s8--d5---2019-2020--4-0l-v8-esr9872235 S 500 (W220) Stock Performance:

S 500 (W220) Stock Performance:

With the proprietary RENNtech ECU+ Tuning the C205 - C 63 AMG Coupe gains up to +56 HP and +107 LB-FT

We have found the M176 engine stock performance numbers vary from the baseline figures claimed by Mercedes-Benz

The 1-piece design can either be finished to match the wheel or in any of the solid or transparent finishes

RENNtech ECU Hand Held Tuner | HHT | CL 63 AMG | C216 | 534HP/485 LB-FT | 6.3L N/A | M156 | MY2008-2010 audi-s8--d5---2019-2020--4-0l-v8-esr9872235 S 500 (W220) Stock Performance:RENNtech ECU HHT (HandHeldTuner) for the 216 CL 63 AMG. Up to 534HP and 485LB FT LB FT. Gains: +16HP & +20 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.