That will leave a line up of SL350, SL500, SL600, SL63 AMG and SL65 AMG.

I assume (pls correct me if I'm mistaken) that the SL63 AMG has a supercharged 6.3 litre V8 whereas the SL65 AMG has a 6.5 litre V12 bi turbo??

I think MB and AMG should focus on improving handling and reducing weight rather than merely increasing engine size and power output. There has to be a point when there is simply too much power going to the rear wheels for it to be worthwhile.

I haven't driven the SL55 or the SL65. I have only driven the SL500 and I found the handling dreadful. It felt like a 2 door, 2 seater S Class. There was so much body roll. They should fix that first!