RENNtech ECU Hand Held Tuner (HHT) for S 55 AMG | W220 | 370 HP / 410 LB-FT | MY2001-2002 mercedes-benz-cla-class--118---2020-present--cla-250-esr6895269 The software retains the audible

The software retains the audible tone or steering wheel vibration

- High Quality Print

E400 (Air Body Control Optional)

The part comes in standard primer or black paint

RENNtech ECU Hand Held Tuner (HHT) for S 55 AMG | W220 | 370 HP / 410 LB-FT | MY2001-2002 mercedes-benz-cla-class--118---2020-present--cla-250-esr6895269 The software retains the audibleRENNtech ECU HHT (HandHeldTuner) for the 220 S 55 AMG. Up to 370HP and 410 LB FT. Gains: +16HP & +19 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.