1972 Cadillac Brochure Fleetwood Eldorado De Ville Calais on 2040-parts.com

2015 BMW M4 Convertible debuts: drop-top fun priced from $73,425

The 2015 BMW M4 Convertible made its official debut at the New York auto show yesterday. While the details of the high-octane hardtop didn't exactly catch us off-guard (see our full breakdown here), we now know how much it'll cost to feel the wind in your hair as you launch from 0-60 mph in 4.4 seconds: $73,425, to start. Complete pricing will be available closer to the M4 Convertible's sale date, which is “late summer” 2014, according to BMW.

Most popular YouTube car videos: Watch them all here

YouTube. The free market of all things video. Is Taylor Swift more popular than Justin Bieber?

Tesla touts top sales at Detroit auto show

Tesla credits the "exceptional cold weather performance" of its Model S for 20 percent-higher-than-expected Q4 sales of 6,900 units, bringing total Model S sales worldwide to 25,000 so far. In fact, Tesla says its sedan does so well in the snow that the rear wheels are the only ones that need any torque. "This car performs outstandingly in winter conditions," said Tesla vp of vehicle engineering Chris Porritt in a video released the day of the Detroit Auto Show.