Not good. I was thinking of upgrading from my 2017 to the facelift to not hear the damn squeaks.

 

I purchased a '21 C63S and it was at the dealer for a little over 2 weeks to resolve rattles and whistles the car had at purchase. There are still a number left but they are not as bad so I am not going to push for them since I feel it would be never ending. This is the worst car I have ever owned in terms of rattles, whistles and squeaks so I do not think going with a newer car would eliminate this.