Mercedes Benz Navigation System Nv4bn110 on 2040-parts.com

The 2015 Porsche 911 Targa will debut Monday

Porsche's bringing the 997-generation 911 Targa to the Detroit auto show and you can watch it debut live at 11:45 AM EST on Monday, January 13. We've been told to expect a "retro" look, "Echoing the design of the original 911 Targa of 1965..." though we're not expecting to see a soft rear window. To watch the debut on Monday, click here.

Future products: Bentley reskins Continentals, works on convertibles

Bentley's sales have plummeted as its cars aged and the economy fell into recession. The launch of the Mulsanne flagship this year is cause for optimism, as is the coming reskin of the Continental range, which was introduced in the United States in 2005. Bentley will begin rolling out the new versions of the Continental next year, starting with the GT coupe.

Mazda brings diesel back to Indy with 6 Skyactiv-D

Diesel has enjoyed great success lately as a racing fuel, but there's one place it hasn't appeared for more than six decades: Indianapolis Motor Speedway. Mazda's breaking that dry spell this weekend, when its Mazda 6 Skyactiv-D race car will head to Indy for the Grand-Am race. We like the 6 in both road trim and racing livery, but that previous diesel-powered racer -- the Cummins Diesel Special -- is pretty neat too.