Oops, one other thing I forgot to mention. On the stem of the oil filter cap there are 2 small O-rings. Replace them on at the next oil change. Be careful when working around the oil filter as it is easy to accidentally disconnect some vacuum lines in that area.
2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg
And remember folks, Only You Can Prevent Hilliary.