RENNtech ECU Hand Held Tuner (HHT) for CLK 550 C209 | 402 HP / 405 LB-FT | MY2007-2009 mercedes-benz-s-class--222---2018-2020--s-65-amg-esr3393684 Rated by Mercedes-Benz: 429 HP
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RENNtech ECU Hand Held Tuner (HHT) for CLK 550 C209 | 402 HP / 405 LB-FT | MY2007-2009 mercedes-benz-s-class--222---2018-2020--s-65-amg-esr3393684 Rated by Mercedes-Benz: 429 HPRENNtech ECU HHT (HandHeldTuner) for the 209 CLK 550. up to 402HP, 405LB FT. Gains: +20HP & 14LB 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
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