RENNtech ECU Hand Held Tuner (HHT) for CLS 500 | C219 | 320 HP / 355 LB-FT | MY2005-2006 audi-s3--8p---2006-2012--2-0l-tfsi-esr5566206 156 - GLA-Class | MY2014+

156 - GLA-Class | MY2014+

All wheels are durability tested according to all United States relevant governmental standards for safe road use

the Sport 1 is tailored to fit specific current and late model Mercedes-Benz and AMG vehicles without any modification

Gains: Up to +222 HP | +83LB-FT

RENNtech ECU Hand Held Tuner (HHT) for CLS 500 | C219 | 320 HP / 355 LB-FT | MY2005-2006 audi-s3--8p---2006-2012--2-0l-tfsi-esr5566206 156 - GLA-Class | MY2014+RENNtech ECU HHT (HandHeldTuner) for the 219 CLS 500. Up to 320HP and 355 LB FT 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.