RENNtech ECU Upgrade | A 45 AMG | W176 | 428HP/417LB-FT | 2.0L Turbo | M133 mercedes-benz-cl-class--216---2007-2014--cl63-amg-biturbo-esr1325885 0L V12 BiTurbo) Stock Performance

0L V12 BiTurbo) Stock Performance (at crank):

RENNtech M277 Biturbo ECU Upgrades are TÜV approved

RPM for Maserati 3

Gains up to: +54 HP | +52 LB-FT

600 RPM Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC vehicles

RENNtech ECU Upgrade | A 45 AMG | W176 | 428HP/417LB-FT | 2.0L Turbo | M133 mercedes-benz-cl-class--216---2007-2014--cl63-amg-biturbo-esr1325885 0L V12 BiTurbo) Stock PerformanceRENNtech ECU Upgrade for the 176 A 45 AMG. Up to 428HP and 417TQ. Gains: +73HP & +85TQ 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. Programming takes only a few