Slk63?
MB probably don't want to sell a light 500hp car that costs half as much as their slightly more powerful (yet much heavier) siblings such as the CL65/SL65. Maybe if the come out with the SL69 (apparently they registered this name) or an even larger 73 (the 7.3 liter engine is already being used in the Pagani Zonda).
But like I said, rumors at best. You'll be waiting for it at least 2 years. But if you do order it now, you'll be the first one to get it
(waiting time, depending on your dealer, can be anywhere from 3-12 months).
55 owners don't have too much to be upset about, the 55 is a damn fine engine. It is still a wee bit better than whatever junk the competition is selling that won the jack in the box award 5 years in a row.
And if the 63 really upsets you, then spend $7500 on an HPS supercharger and all is well again in AMG land.



