The SLC, you may recall, will be a transitional vehicle that Mercedes uses to implement a new all-aluminum space frame in its lineup. The car will be limited to a very low volume, though the processes used to build it will pave the way for aluminum to be injected into the new SL line of cars when they appear in 2012. There have been rumors that the SLC will feature gullwing doors like Mercs of yore, though these spy shots don't support that theory either way.
In fact, all we're able to see are general proportions at this point, and its clear from the extra-long bonnet that this car will be front-engine and rear-wheel-drive. We suppose all-wheel drive is a possibility, though we don't expect the AMG team to abandon their favorite layout.