Gas-Sipping Performance: 2012 Mercedes- Benz SLK55 AMG

By Joel Arellano | August 22, 2011
Fuel efficiency fever is sweeping across automakers, affecting even their most unlikely divisions. AMG, the performance arm of Mercedes-Benz, has updated the 2012 Mercedes-Benz SLK55 AMG to deliver more mpg without sacrificing performance. Heart of the SLK's gas-sipping prowess is its 5.5-liter V-8 engine, which it shares with the Mercedes-Benz E63 AMG, CLS63 AMG, S63 AMG, and CL63 AMG vehicles. Cylinder deactivation technology shuts off four of the engine's cylinders when the roadster is in "C" mode, or Controlled Efficiency. The inactive cylinders instantly rev back to life if the driver needs that boost of power. Speaking of coming back to life, Controlled Efficiency shuts down the engine while the vehicle is stopped at a red light, stop sign, or intersection. Sensors in the engine note the activity of the cylinders prior to shutdown to activate them instantaneously once the driver either lifts his or her foot off the brake or presses down on the gas pedal. Finally, the SLK55 features regenerative braking to squeeze out even more fuel economy from the roadster.
The 2012 Mercedes-Benz SLK55 AMG engine is mated with a seven-speed automatic transmission. Except for the new engine and availability of an AMG Handling Package for an even more sporty drive, the SLK55 AMG carries over unchanged feature-wise for the 2012 model year. The 2012 Mercedes-Benz SLK55 AMG arrives at U.S. dealerships in early 2012. Source: Mercedes-Benz