RENNtech ECU Hand Held Tuner (HHT) for CL 55 | C215 | 370 HP / 410 LB-FT | MY2001-2002 mercedes-benz-slc-class--172---2016-present--slc-43-amg-esr5326223 ECU+ Upgrade | Up to

ECU+ Upgrade | Up to 773 HP / 778 LB-FT | Gains: +82 HP & +84 LB-FT

Huracan Tecnica

209 - CLK 63 AMG

Up to 428HP and 417TQ

RENNtech carefully selects the turbo cores we use for use in our turbo upgrades

RENNtech ECU Hand Held Tuner (HHT) for CL 55 | C215 | 370 HP / 410 LB-FT | MY2001-2002 mercedes-benz-slc-class--172---2016-present--slc-43-amg-esr5326223 ECU+ Upgrade | Up toRENNtech ECU HHT (HandHeldTuner) for the 215 CL 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.