We recently spent a few days behind the wheel of the 2013 Mercedes-Benz SLS AMG GT Roadster, covering the drive on social the whole way. Check out our impressions and more in this Joy Ride drive.

Audi is headed back to Le Mans again this year, but this time, it's bringing the R18 e-tron race car with some new aerodynamic additions, including a long tail. Will it be enough to hold off the competition?

And Volvo has completed testing of its F1-style KERS hybrid system for the street, claiming fuel savings of up to 25 percent--without batteries or electric motors.

Find all of this and more in today's car news headlines here at Motor Authority.

2013 Mercedes-Benz SLS AMG GT Roadster: Joy Ride

Audi Starts Tests Of Long-Tail R18 e-tron quattro Ahead Of Le Mans

Volvo Completes Tests Of Flywheel KERS, Confirms Fuel Savings Of 25 Percent

HSV’s New Gen-F Range Expected To Feature LSA-Powered Flagship

Michael Schumacher To Lap Nürburgring In F1 Car

Infiniti M Sedan Scores IIHS Top Safety Pick--Just In Time To Change Its Name

2013 Infiniti JX / QX60 Video Road Test

J.D. Power: Consumers Very Interested In Autonomous Car Features

As Predicted, Fisker Execs & DoE Get Roasted In House Hearing

Build Your Own Metal-Air Battery Car: Now There's A Kit