The CLS 63 AMG Shooting Brake is having all its kinks worked out. Our spy photographers have just snapped the first pictures of the new 2013 Mercedes-Benz CLS 63 AMG Shooting Brake. The apparently production-ready model is wearing just a bit of camouflage on its back but still looks good doing it.The Shooting Brake variant of the CLS 63 AMG features a more aggressive front fascia, sportier wheels and tires, bigger brakes and quad tip exhaust which indicates the CLS Shooting Brake is packing some serious power.Even with its modest camouflage on the hind-quarters, it\'s not hard to see the production model will keep almost all the sleek lines of the CLS Shooting Brake Concept which the Germany company debuted at the 2010 Beijing Auto Show.The CLS Shooting Brake should come with a 402hp 4.6-liter twin-turbo V8 found in the standard CLS. The more powerful AMG model seen in these photos will pack a 5.5-liter biturbo V8 mated to AMG\'s Speedshift MCT 7-speed transmission.