Bully Dog Rapid Power: The Rapid Power module improves fuel economy and adds power to the Mercedes 3.0L V6 Diesel engine. This is achieved by increasing the efficiency of the fuel injection system. Results show increases of 35hp and 40 ft.-lbs of torque. The installation is extremely easy and takes no more than 20 minutes. It also does not require any mechanical experience since the modules come equipped with OEM type plugs.