RENNtech ECU Hand Held Tuner (HHT) for G 55 (W463- 370 HP / 410 LB-FT) mercedes-benz-slk-class--171---2004-2010--slk-55-amg-esr5743216 development and long-term testing ensure

development and long-term testing ensure that our ECU upgrade offers the best in quality

GLS 450 BiTurbo (X166 - M276 Biturbo 4-MATIC Engine) Stock Performance:

0" front and rear

+26 HP & 33 TQ

650rpm Note: Mercedes M176 engine performance when measured

RENNtech ECU Hand Held Tuner (HHT) for G 55 (W463- 370 HP / 410 LB-FT) mercedes-benz-slk-class--171---2004-2010--slk-55-amg-esr5743216 development and long-term testing ensureRENNtech ECU HHT (HandHeldTuner) for the 463 G 55 AMG. Up to 380HP and 410 LB FT 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. Programming takes only a few