RENNtech ECU Hand Held Tuner (HHT) for CLK 500 C209 | 320 HP / 355 LB-FT | MY2003-2006 mercedes-benz-sls-amg--197---2011-2014--sls-black-series--2014--esr5166974 RENNtech ECU Upgrade for 216

RENNtech ECU Upgrade for 216 - CL 550

Rated by RENNtech (peak @wheel):              502 whp @ 4

512 wtq @ 5

With the proprietary RENNtech ECU Plus Upgrade the C253 - GLC 43 AMG Coupe gains up to +41 HP and +62 LB-FT

469 HP @ 6

RENNtech ECU Hand Held Tuner (HHT) for CLK 500 C209 | 320 HP / 355 LB-FT | MY2003-2006 mercedes-benz-sls-amg--197---2011-2014--sls-black-series--2014--esr5166974 RENNtech ECU Upgrade for 216RENNtech ECU HHT (HandHeldTuner) for the 209 CLK 500. Up to 320HP and 339 LB FT LB FT. Gains: +18HP & +16LB 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.