At the end of the day what people on here think doesn’t matter as you will be driving it! So drive both and see what you think. This forum is great for grabbing a perceived issue and then many people repeat it as gospel. Truth is all cars have issues. A E55k estate will now be an ageing car with all the issues you get never mind the engine. By this I mean problems getting a good one. Age related failures and issues. By definition a C63 will be newer. I can only call it as I see it. I have 3 of these horribly unreliable 6.2 engined cars and none of them have given me any engine related problems. People get hysterical about head bolts but what is the actual failure rate? Try both and choose what you like. I am sooooo bored with the debate here. It’s great people are really happy with the cars they have but why the need to try convincing everyone it’s the best ever created. Beats me! Good luck!
Yes you are right, I can't imagine I'd be disappointed with either. The C63 seems like a simple car with no airmatic etc, which I like, and imo sounds better. The 211 is a little cheaper to buy, people say feels quicker (but I've not driven either, so don't know) plus the possibility of tuning. I'm sure I'd be happy with either. I need to wait until January to buy really anyway, but can't help looking/watching/reading/dreaming!