There's a 2015 Ford Mustang convertible on the way, too

Almost immediately after the Ford Mustang debuted, buyers could choose from three body styles -- a hardtop, a rag-top convertible and a fastback (which actually came out a few months later than the hardtop and convertible). We already knew that the 2015 Mustang will arrive as a fastback (sorry, notchback partisans), but Ford has just announced that a drop-top version is also in the works. Pictures of the convertible sport a shiny "5.0" badge on the side and and chrome "GT" badge on the back, but we assume all the standard engines -- the 5.0-liter V8, 3.7-liter V6 and that new 2.3-liter EcoBoost turbo-four -- will be offered.

Daimler-Renault alliance to delay new Smart and Twingo models, report says

Renault SA and Daimler AG, who are sharing technology to build the new Smart ForTwo and Renault Twingo cars, will delay the introduction of the models by a year, according to a French newspaper. The cars will now come to market in 2014 instead of 2013, La Tribune said, citing industry sources. The next ForTwo and the third-generation Twingo will be built on Renault's A platform, with ForTwo production continuing at Smart's plant in Hambach, France, and Twingo output at Renault's Novo Mesto factory in Slovenia.

Watch Tesla Model S testing new titanium armor

In a missive signed by Elon Musk himself, Tesla announced it would be adding titanium plates and aluminum deflectors to all new Model S sedans and offering free retrofits for the 20,000 or so existing EVs. The company earlier offered an over-the-air software update to raise the ground clearance of the Model S so the car would be more likely to clear dangerous road debris. The actions were in response to well-publicized fires in the electric luxury sedans.