2014 Mercedes-Benz S63 AMG revealed

Mercedes-Benz's AMG performance-car division has officially revealed its new 577-hp S63 AMG ahead of the rapid sedan's public Frankfurt motor show debut in September. Several traditional AMG styling mods distinguish the S63 from recently introduced but lesser S-class models (“S-class Stunner,” Autoweek, May 27). They include a deep new front bumper, chromed blade grille, twin-turbo V8 badges on the side and beefed-up sills.

Tracking device can also alert driver about a late car payment

That buzzing noise you hear in the car could be more than a seatbelt reminder--it could be a payment reminder. Some dealerships install tracking devices in the vehicles of high-risk buyers. That makes it easier to track down the buyer--and the car--if the payments stop.

Tesla, Chrysler take federal loan payment dispute public

Tesla CEO Elon Musk took to Twitter Thursday to respond to Chrysler's barb that Tesla wasn't the first American automaker to repay the U.S. government for aid. Tesla, which paid off the remaining $451.8 million on its 2010 Department of Energy loan Wednesday, received $465 million under the highly politicized Advanced Technology Vehicle Manufacturing loan program.