If trap ox is not removed, (large doughnut looking thing in front of turbo) It's really a great thing! Mercedes will still remove it and give you a lot of new parts, poss even a new turbo!
Run a carfax of course, and see if dealer has any books and records. Looks pretty good I would probally check it out pretty thouroghly if I were in the area! Good Luck!

Yeah and check the head number, if memory serves you do not want a #14 head (it's on the side of the head, last number on part) but a 17-22 is ok.

Joe