Don’t go for MB Comand, it’s old, clunky, and would be hellishly expensive to fit.
I assume you have Audio 20 set up, just replace it with either an android unit (like Erisin or Xtrons- on eBay, they do direct fit versions *but check the mounting size of your original- as there are 2 sizes on clk*
or go for a regular double DIN from Alpine/Pioneer/Kenwood.
make sure you order the modules to keep steering controls working.
Read the threads on here about changing to android units etc.