RENNTECH CLS55 AMG PKG1
Includes: ECU upgrade, crankshaft pulley

The RENNtech Stage 1 package for th CLS55 AMG will step your performance up from 469 HP and 516 LB-FT to a stout 514 HP @ 5900 RPM; 566 LB-FT @ 2650-4500 RPM, while adding 2MPG to your fuel economy.