Spy photographers caught the 2008 Mercedes C 63 AMG in testing this month. This is the least disguise we’ve seen on the new C-Class, and it’s also the most exciting model expected in the lineup. Like the other ‘63′ AMG models, the C63 is powered by a 6.2-liter naturally aspirated V8 pushing 503 horsepower. This report seems to discredit suggestions that Mercedes would introduce a C63 model using the current body style.