Mann, Knecht, or Hengst are the approved OEM filter brands and I think most here will say is the only
choice of filters for MB's. These will come with the neccessary gaskets/washers that need to be replaced. Get them at an indie shop or a imports parts shop as the blue filters stmped with the MB-star from the dealer will cost you double (like $12) even thought they're made by Mann (or Knecht, I forget which).
Other than that, I know of no Benz whose oil doesn't change like any other car (certainly not like you Range Rover sounds
). I crack the oil filler cap so the oil doesn't blast out the drain plug too far, then: drain, remove old filter, replace drain plug, replace new filter, and fill'er up!