New spy shots have emerged of the much rumored Mercedes-Benz SLC supercar, which is said to replace the already legendary SLR. AutoWeek has published pictures of a test mule making rounds on a track, but heavily masked with plastic and tape. Rumor has it that the codenamed C197 will have a AMG V8 with 580 to 600hp and go from 0 to 62 mph in 3.8 seconds. Even with a V8, the supercar should be on par if not better than the outgoing SLR, due to its weight advantage, mostly because aluminum and carbon fiber will be used in the construction of the frame and body.