Chicago-based tuning firm Speedriven has just released a special tuning package for the Mercedes-Benz SL
600. The amazing thing about this roadster is that it will run on natural gas. This 2007 SL600 Mercedes-Benz
is powered by a powerful 5.5-liter twin-turbo V12 that's capable of delivering some 799-horsepower and 1000 lb-ft of peak torque. With all that power it's no wonder that the SL can do 1/4 mile in just 10 seconds.