Mercedes-Benz and Citroen have released pictures of new concept cars, days ahead of the models’ debut at Auto China.

The Concept Shooting Break is a continuation of Mercedes-Benz’s exploration of the possibilities of the coupe and gives some indication of the direction the firm is likely to take in future design.

The concept follows Mercedes’ current design visions of four-door coupes and is clearly reminiscent of the pioneering four-door CLS Coupe, which preceded similar ideas from other manufacturers such as the Jaguar XJ and VW Passat CC.

However, it also takes cues from the recently unveiled SLS AMG, with a large radiator grill (complete with oversized Mercedes-Benz star).

The French carmaker has just unveiled today the Citroen Metropolis concept which will be premiered at the Shanghai World Fair from 1st of May 2010.

Created by Citroën‘s international design team – based in Shanghai since 2008 – Citroën Metropolis will be on show in the French Pavilion at the Shanghai World Fair from 1st May to 31st October, 2010.

The Citroen Metropolis is a big luxury sedan with a wheelbase bigger than both the Audi A8 or Mercedes S-Class and it just so happens to follow the debut of the BMW long-wheelbase 5 series at the Beijing Motor Show.

Andrei Avarvarii, a student getting his Master’s degree at Milan’s Scuola Politecnica di Design, designed this tasty electric Lamborghini concept.

This project took place under the supervision of Filippo Perini, the head of design from Lamborghini and it represents a possible future electric vehicle.

The electric Lamborghini is equipped with 4 asynchronous motors that divide power 70% to the rear and 30% to the front axle.

Electricity is supplied by a Li-Tec flatcell battery pack located in the rear doubled by a KERS system in the front.

Unveiled at last year’s Frankfurt show to a very select audience, the “four-door Veyron” remains a concept for now, but new images have surfaced showing the Galibier in black.

We like it considerably more this way, rather than the exposed carbon and blue shown before.

These new photos have also given us a chance to notice a few more details about the superfast auto – like the illuminated logos on the rims.

With a gorgeous design, this luxury 4 door sedan packs a 8.0-liter 16-cylinder engine with two-stage supercharging and can reach speeds of 220 mph.

Tesla Motors have teamed up with Swiss luxury watch company Tag Heuer to produce a special edition of its Roadster.

The vehicle will make its debut at the Geneva Auto Show this week. The idea is for both luxury brands to increase their global cachet.

Tag, which is unveiling a new tech-savvy watch on March 18, has yet to become a major presence in the U.S., while Tesla is still building its presence in Europe.

The car itself, designed by Tesla chief designer Franz von Holzhausen, integrates Tag design features into the dashboard, center console and exterior.

The 2011 Porsche 918 hybrid concept is set to debut tomorrow at the 2010 Geneva Motor Show.

The 918 hybrid is powered by a 500 HP V8 engine along with two electric motors which supply an additional 218 HP.

Porsche claims that it delivers up to 78 miles to the gallon and can travel 16 miles on battery alone.