Mercedes-Benz has big plans for its new front-drive platform. Not only does it underpin the new A- and B-Class hatchbacks, but a slew of other model variants are in the pipeline, including a possible SLA roadster and GLA crossover. Before those come along, though, Mercedes will take the wraps off the new CLA in Detroit next month, and the CLA45 AMG at the Frankfurt show next September. To give us an idea of what we're looking forward to, the German automaker has released these teaser photos and video.