kavadarci

I'm not sure if it has been asked before but can someone advise on their preference between these two cars.
I like the coupe look of the E350\550 but it turns me off the fact that is sitting on a c - class platform.
I would have no objections on the 2008 up CLS550 but wondering if someone can share little bit more details on the driving dynamics, pain points, gremlins and overall maintenance between the two.

Thank you.