Usually it takes some months for Mercedes to reveal the AMG editions of every new model they introduce, but with the new CL-Class the first images are already out and you can see every details. Official specs are yet to be released, but apparently the CL63 is still called the CL63 despite the fact it uses the new 5.5 liter V8 biturbo instead of the non-turbo 6.3 liter engine. The CL65 AMG still gets the 6.0 liter biturbo V12 as in the old model.