RENNtech ECU Hand Held Tuner (HHT) for SLK 55 | R171 | 380 HP / 395 TQ | MY2005-2009 mercedes-benz-cla-class--118---2020-present--cla-35--amg-esr2775909 MANUFACTURED IN THE US

MANUFACTURED IN THE US

R-Line Comparison: Vehicle Package HP Gains TQ Gains X167 - AMG GLS 63 Stock

Jaguar F Type SVR (X152) 2018+

217 - S 63 AMG Coupé 4-MATIC

85 mph W/S 213 - AMG E63 R3 Package w/Launch Control 2

RENNtech ECU Hand Held Tuner (HHT) for SLK 55 | R171 | 380 HP / 395 TQ | MY2005-2009 mercedes-benz-cla-class--118---2020-present--cla-35--amg-esr2775909 MANUFACTURED IN THE USRENNtech ECU HHT (HandHeldTuner) for the R171 SLK 55 AMG. Up to 380HP and 395 LB FT TQ. Gains: +18HP & +17TQ. 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.