This is the new mercedes 5.5L twin turbo v8.... it replaces the 6.3L N/A v8
Standard is 518 hp, 516 tq, 0-60 in 4.4 sec and 155 mph top speed
AMG Performance Package gets you the 550 hp, 590 tq, 0-60 in 4.3 sec and 186 mph top speed
The amg performance package will get a combined 24 mpg and up to 33 mpg highway.
I can't wait to see what the aftermarket tuners can do!
I also can't wait to drive one!
http://jalopnik.com/5692547/amg-stur...0+hp-cls63-amg