Originally Posted by MercedesTheBest
with the S class coupe, does that mean there is no CL class anymore?
since the CL class was based on the S class coupe then it would make sense that the CL is now the S class coupe once again.
That is correct, the CL (which was the new designation for the SEC [S-Class Coupe] after the redesignation in the early 90s) is now the S-Class coupe, just how the CLK (the E-Class coupe) gave way once more to the designation of E-Class coupe.
It's probably a matter of simplification since these vehicles share more parts directly with their sedan counterparts. The SECs of the 80s and 90s were just shorter, two-door version of the sedans, with the occasional aesthetic difference. The same applies to the coupes and sedans of the 124-series, the first and last series to have a designated E-Class coupe, before the arrival of the CLK with the W210. The C/A209 CLKs closely resembled the W203 C-Classes in terms of headlight styling, but still took most of their styling cues (tail lights, facelifted grill design, etc.) from the W211 E-Class sedans.
MB probably felt they were a little too diverse with their coupes, so they decided to reign them in and give each of the three sedan classes (C, E, S) their own coupe models which are more closely related once more. This increases manufacturing efficiency due to more shared similarities between body styles, and the the fact that they share 60% or more of the same parts allows for easier maintenance/repair, and and less special items to manufacture.
It's probably also a move to use the "CL" designation for the four door coupes of the CLS and CLA, but now I'm just speculating