RENNtech ECU Hand Held Tuner | HHT | W211 | E55 AMG Kompressor | 517HP/552LB-FT | 5.5L Kompressor | M113 | MY2003-2006 mercedes-benz-s-class--223---2021-present--s-500-esr4433616 The maximum power number reached

The maximum power number reached with the RENNtech ECU Upgrade for the E400 is 392 HP and 463 LB-FT

not published

648 HP   713 LB-FT   X167 - AMG GLS 63 ECU Upgrade

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

204 - C 63 AMG

RENNtech ECU Hand Held Tuner | HHT | W211 | E55 AMG Kompressor | 517HP/552LB-FT | 5.5L Kompressor | M113 | MY2003-2006 mercedes-benz-s-class--223---2021-present--s-500-esr4433616 The maximum power number reachedRENNtech ECU HHT (HandHeldTuner) for the 211 E55 AMG Kompressor. Up to 517HP and 552LB FT. Gains: +48HP & +36TQ. 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.