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Mercedes F125 concept (2011) at Frankfurt motor show

Mercedes today unveiled the F125 concept car - a car bearing the three-pointed star's F name to demark it as a tech testbed, and the 125 to mark Merc's 125th anniversary in this four-wheeled business. It's a hydrogen fuel-cell vehicle, and Merc claims a punchy 1000km (620-mile) range. But the scientists here are proud of the cutting edge lithium sulphur batteries, used to store energy created by the fuel-cell.

Video: Lexus LF-CC concept explained by its designers

We're big fans of the Lexus LF-CC concept after seeing it in Paris. It's not what you would call traditionally beautiful but it's incredibly complex, engagingly off-beat and, most importantly, shows – along with the LF-LC concept – that Lexus may finally have a recipe for distinctive and consistent design. Here Lexus Design's General Manager Yo Hiruta discusses the continuing evolution of the brand in an interview with the Lexus Blog.

Chrysler cuts Viper output amid slow sales, growing inventory

Chrysler Group has cut output of the SRT Viper by a third and will reassign scores of workers to other plants because of slow sales, growing inventories, and the onset of colder weather. Workers at Chrysler's Conner Avenue Assembly plant in Detroit, where the car is assembled, were told of the production moves today. None will be laid off; instead they will be reassigned to other Chrysler plants in the Detroit area, a Chrysler spokeswoman said.