RENNtech ECU Hand Held Tuner (HHT) for E 500 | W211 | 320 HP / 355 LB-FT | MY2003-2006 mercedes-benz-e-class-coupe--238---2017-present--e-400-esr9718640 The RENNtech HPFP upgrade is

The RENNtech HPFP upgrade is for serious enthusiasts

X253 | GLC-Class

552 wtq @ 4

405 LB-FT @ 2800 RPM

642 LB-FT @ 4

RENNtech ECU Hand Held Tuner (HHT) for E 500 | W211 | 320 HP / 355 LB-FT | MY2003-2006 mercedes-benz-e-class-coupe--238---2017-present--e-400-esr9718640 The RENNtech HPFP upgrade isRENNtech ECU HHT (HandHeldTuner) for the 211 E 500. Up to 320HP and 355 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. Programming