The all new 2013 Mercedes-Benz SL Class is underway and as of now they are testing it on the oval racetrack. This prototype 2013 SL-Class was recently spied lapping the Nurburgring and hanging out with the current-generation SL. Although the vehicles appearance is a lot different. They look like a camouflage  vehicle or Batman’s bat mobile.

This new Mercedes Benz has a different look compared to the older models. The new SL is expected to draw styling cues from the the model line’s range-topping SLS AMG, including the nearly 90-degree grille and vertically-opposed headlights.

Comparisons with the current SL – built on a platform now some nine years old – the spied test car appears to carry a lower, wider stance, pointing to sportier intentions. While it is far too early to know specific technical details, the new SL-Class is likely to be built on a light aluminum space frame chassis, leading to a kerb weight much improved over the current model’s 1750kg to 2050kg.

In regards to it’s engine, power is expected to come from a choice of either a V6 or V8 engine, depending on spec, trim and price. The new car is also expected to share many of its components with the SLS AMG, including suspension and the SLS AMG’s seven-speed dual-clutch transmission.

The all-new model is not expected to arrive in showrooms until mid to late 2012. But definitely it’s worth the wait.

Still on stealth testing mode in the frigid Scandinavian weather, the next generation of Mercedes-Benz SL-Class will show an extended hood and a wider carriage. This wide look is mirrored in the tail lights, in its flattened form, stretched to appear broader, and in the lenses which now have nice rounded style elements rather than its usual level, horizontal design.

Although the new SL prototype is heavily masked, the updates seem to have erect grilles, projector headlights, and exterior mirrors that has been repositioned. There are indications, too, that the interiors will be sporting a wider, GPS screen resting higher up on the dashboard.

Benz watchers say this update is likely to be a major one, although there are no clues yet as to when it’s going to be released.