A few months back, we mentioned that Mercedes-Benz might be working on a new and smaller roadster that should be positioned below the current SLK. The SLA is inspired by the BlueZero concept unveiled at the 2009 NAIAS in Detroit and should provide great performance while being power by a small and fuel efficient engine. The SLA will be based on the A-Class platform and would compete directly with VW Bluesport, Audi R2 and BMW Z2. While the above illustration from the folks over at Automarket is not official of course, it is very similar to the BlueZero concept.