One Lap of the Web: KERS, Klass and autonomous cars

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- KERS, the kinetic-energy-recovery system, was first seen in Formula One a few years back.

Arrest made in Paul Walker Porsche parts theft

An arrest has been made in an apparent theft of a piece of the destroyed Porsche Carrera GT involved in a Saturday crash in California that killed actor Paul Walker, CNN is reporting. A number of cars had reportedly followed the tow truck that was transporting the wreckage to a police facility. When the truck stopped at a red light, the occupant of one of the vehicles, alleged to be 18-year-old Jameson Witty, ran up to the truck and retrieved a piece of the wreckage, a T-top roof panel of the red Carrera GT, He later posted a photo of it on Instagram.

The BMW M5 is back!

BMW's M division has gone back to the drawing board with the M5, giving the fifth generation of the iconic four-door a twin-turbocharged 4.4-liter V8 engine—the first time Munich's class-defining performance sedan has gone without a naturally aspirated powerplant since its introduction in 1984. Further changes see it adopt a dual-clutch gearbox as part of a complete driveline rethink that resigns the old model's sequential manual transmission to the history books. Revealed here officially for the first time, the new M5 is planned to make its world debut in concept-car guise at the Shanghai motor show later this month.