I saw this thread and immediately remembered my Supercar Calendar from 2009
And I remembered seeing this car, but it's so barely mentioned that the only thing I could recall was it was a 1-off car and was had a Mercedes badge on it
And a simple google search aaaaaaaaand:
Lotec C1000
Twin-Turbo Mercedes V-8 with ~1000bhp, and a guesstimated top speed of 268mph... One off though so I don't reckon we'd ever find out.
It's a weird looking car but I find it very cool to look at, very futuristic and stuff x3