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 R3 Performance Package for Mercedes-AMG

R3 Performance Package for Mercedes-AMG E63 (S): ECU Upgrade (HHT)

512 wtq @ 5

CLASS C SW (S 204) 63 AMG Performance [2 Filters Required] (HP: 457 | Year: 08 > 09)

they are major stress risers which can lead to premature cracking

Tested on RENNtech’s AMG GT over thousands of road miles and hundreds of track laps

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 R3 Performance Package for Mercedes-AMGRENNtech 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.