It is the easiest engine I have ever changed oil in and I am 81 years old. There are videos on U-tube and yes, if you do the suction method you do not even need to get under the car. Use only Mann Fleece oil filters and 5W 40 synthetic oil. I change mine every 5K miles and have owned my first one since 2006. I do not recommend a dealer for anything, and most Mercedes dealers will not even work on them because of the Chrysler nameplate. If you must, your best bet is an independent shop that works on Mercedes. What you are buying is mechanically a 2004 Mercedes SLK 320 with a Chrysler designed body..
Please review post #24.