How do I clean/ wash my designo Alanite Grey Magno (matte) color on my S class w222 2016. Aswell as the alloys since they are not standard.

Hi, I recently bought my W222 S class with a very nice paint job, the
designo Alanite Grey Magno (matte), and I did not know what care it
demands. This is a very fussy paint job. Could you plz advise me how
should I keep making it look good while the dull matte finish remains. And
how should I Keep the alloys cleans and shiny aswell, since iv seen a lot of
videos online of people spraying some acid or something on the alloys and
they start to bleed red or something. I would really appreciate if you could
help me. you can contact me on (zanebhandara22@gmail.com)

Thanks a lot.