I just dunno how the CLA45-AMG can be available for public consumption, so to speak, before next summer (about a year from now). The earliest CLA250 USDM deliveries will be mid-fall 2013 (latter September / earlier October), so it's very doubtful that the 4Matic will be November (IMVHO); it had been purported that the AWD version would be publicly available 6 months after the regular CLA, and the AMG-version another 6 months after that (or 1 year after the regular CLA availability).
I know someone mentioned in a thread that the AMG version of the CLA would mid-winter & the 4Matic being early winter w/ the regular CLA late Fall. I don't see how that can be feasible based on past MB release schedules. But, if such is the case- people need to plan accordingly as waiting a few months for the 4Matic and/or AMG isn't that much of a wait, relatively speaking.