RENNtech ECU Hand Held Tuner (HHT) for CL 600 | C215 | 625 HP / 745 LB-FT | +132HP / +155LB-FT | MY2003-2006 mercedes-benz-amg-gt--192---2023-present--amg-gt-55-esr6223251 ECU+ Upgrade | Up to

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

Our intermediate ECU tune increases performance from 550 HP and 544 lb/ft torque up to 638 HP and 695 lb/ft at the crank

CLS 63 AMG (C218 | MY2014 | 4MATIC | M157 | 5

optimizing air-to-fuel ratios

0L V6 BiTurbo) Modified Performance (at crank):

RENNtech ECU Hand Held Tuner (HHT) for CL 600 | C215 | 625 HP / 745 LB-FT | +132HP / +155LB-FT | MY2003-2006 mercedes-benz-amg-gt--192---2023-present--amg-gt-55-esr6223251 ECU+ Upgrade | Up toRENNtech ECU HHT (HandHeldTuner) for the 215 CL 600. Up to 625HP and 745 LB FT LB FT. Gains: +132HP & +155 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.