The Mercedes CLS Shooting Brake production version was spied today doing cold weather testing. For those of you unfamiliar with the CLS Shooting Brake, it is an estate version (station wagon) of the Mercedes CLS four-door coupe. For in-depth information, you can visit an old press release here. Mercedes-benz plans to sell the CLS Shooting Brake with several diesel and petrol engine options. A high-performance CLS63 AMG version of the Shooting Brake is also expected. The CLS Shooting Brake will go into serial production in 2012, the sporty four-door Coupe with sloping tail end based on the CLS will roll-off the assembly line in the Mercedes-Benz Plant Sindelfingen.