Anyone tried spray the non AMG diffuser in grey and has a picture?

Just though the contrast will give it a better look on lighter colour s class

 

First of all, welcome to the site. It's always nice to get new members.
On the subject of the spray painting, and with all due respect, this is the type of thing that is talked about frequently in the C Class forum. Most folks with a nice, new S Class, probably wouldn't go for that. Mind you though, this is coming from someone who is giving serious consideration to having all or part of the Panorama Roof on his 2015 S550 painted silver to match the rest of the car, so take it for what it's worth.