RENNtech ECU Upgrade 335d E90 (2007-2011- N73N2 Steptronic Diesel) mercedes-benz-c-class--205-coupe---2016-2023--c43-amg-esr9043036 factory settings do NOT allow

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

Increased horse power and torque can cause failure of the stock axles and is a must for any performance tuned biturbo Mercedes looking to put down all available power to the drive wheels

Minimizes bump steer that exists on OEM subframe

The cartridge supporting shaft is also both larger and stronger designed to handle the larger wheels and additional power

RENNtech ECU Upgrade 335d E90 (2007-2011- N73N2 Steptronic Diesel) mercedes-benz-c-class--205-coupe---2016-2023--c43-amg-esr9043036 factory settings do NOT allowRENNtech ECU Upgrade 335d E90 (2007 2011 N73N2 Steptronic Diesel). Up to 346 HP + 480 TQ. Gains: +81 HP & +55 TQ. Our proprietary BMW ECU upgrade offers rock solid performance from RENNtech, the foremost tuning authority on Bosch and Siemens engine control units. These same units are utilized in Mercedes Benz vehicles, which RENNtech has been tuning since electronic engine management started to show up in vehicles during the mid 1980's, though our