Mercedes is attempting to revive interest in its top-of-the-line SLR by chopping the top off of the 200+ mph supercar. The Mercedes/McLaren Roadster will have a carbon fiber top available in three different colors with improved chassis stiffening and no loss in performance. Taking aim at Lamborghini's Murcielago LP640 Roadster, Mercedes claims 0-62 mph will come in at 3.8 seconds. The roof opens and closes semi-automatically in less than ten seconds, thereby combining the desire for convenience with the puristic character of the roadster. To open, the roof merely needs to be unlocked from the windscreen frame and be briefly raised, after which it folds away electrically. Since an aluminum cover is integrated into its front section, the roof elegantly closes off the top when re-tracted. Expect about a 10% increase in price over the coupe making the Roadster roughly $500,000. Rumors have also begun to spread about Mercedes buying out the remaining 60% of McLaren that it doesn't already own. While no official word has been released, McLaren CEO Ron Dennis has stated that if an opportunity presents itself and will benefit McLaren, then he will embrace it. If a merger doesn't happen, there could be a chance that Mercedes and McLaren could ultimately end their relationship and pave the way for McLaren to release its own street legal supercar.