Those adorable scamps at Autoblog.nl say the sekrit mystery AMG set to debut in New York is the CLK63 Black Series. That is, a pure-sports version of the CLK63 introduced last year. It'll likely be offered in a greater limited number than the ultra high-performance CLK DTM model, and — even more important to us yanks — it looks like it'll be available stateside.
NYIAS Surprise: Mercedes-Benz CLK63 AMG Black Series [Autoblog.nl]
CLK 63 in the UK: AMG Releases Details on Coupe and Cabrio;Spy Video: AMG Black Series on the 'Ring; Go Ahead, Pimp Mein Auto: AMG Launches New Design Studio, New Limited-Edition Series [internal]