Next-Generation Mercedes-Benz SLK Spied

We won’t see a new SLK roadster for another couple of years, but Mercedes-Benz is already diligently testing its all-new 2012 model well ahead of its debut. Surprisingly, engineers decided to leave most -- if not all -- of the heavy camouflage off the car.

Size-wise, the test car looks as if it keeps its current dimensions, but is expected to shed some weight by employing additional lightweight materials. The current SLK’s SLR-inspired nose appears to have been eschewed in favor for a look influenced by the company’s latest supercar, the SLS AMG. Rearview mirrors are mounted on the doors -- another SLS attribute. LED strips below the headlamps keep the SLK in-line with current trends.

The taillights in the rounded rump receive the LED treatment as well, while the SLK's trunk lid gets a subtle spoiler and now serves as the location for the radio/communications antenna. This particular prototype also seems to sport a larger rear glass window.

A new engine lineup with a diesel option is rumored to be in the works. Insiders say it could make its debut in Paris this September, but will most likely make its first appearance at next year's Geneva show