I don't think they should and I hope they don't. The CLC, A, B class are merc's cheap cars that are offered at low price ranges. If AMG ever does a version of the CLC or even A or B then it would cause conflict to the AMG c class.

1. CLC amg will be cheaper than the amg c class which will reduce their sales
2. CLc amg will probably be faster than the normal c class and the price will be the same and again lowers the sales of c class and everyone will get the clc amg

It's very similar if BMW makes the M1 comparing it to the 3 series line.