Maybe I got a bad 3.5, but have a good 3.0, since I do know of Mercedes Benz products going the 5000 to 6500 miles between oil changes WITHOUT using ANY oil.(this is part of a last post by benzdiesel)
sure is confusing for an old man,lol
if it is a 3.5 then i suppase i did answere part of the question, help benzdiesel.
larry perkins