RENNtech ECU Hand Held Tuner (HHT) for CLS 500 | C219 | 320 HP / 355 LB-FT | MY2005-2006 mclaren-slr-sls-class--197---2011-2014--amg-esr2440417 53 AMG EQ Boost (MY2018+

53 AMG EQ Boost (MY2018+ | M256 | 3

the factory settings do NOT allow the valves to fully open unless certain speed and/or RPM have been reached

C257 - CLS Coupe CLS450 (Air Body Control Optional)

Bumperette Delete AMG GT Series

CLASS S LONG (V 220) 600 V12 [2 Filters Required] (HP: 500 | Year: 02 > 05)

RENNtech ECU Hand Held Tuner (HHT) for CLS 500 | C219 | 320 HP / 355 LB-FT | MY2005-2006 mclaren-slr-sls-class--197---2011-2014--amg-esr2440417 53 AMG EQ Boost (MY2018+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.