I’m in the process of eliminating oil leaks on the recent purchase of a ’99 E320 with 90,000 miles.

The oil filler body has a leak at the seam show in the pic. A small amount of oil vapor leaks from the seam each time the car is driven and accumulates on the body and valve cover. Has anyone else experienced this? Is the body defective? How difficult would it be to replace this part? What parts would I need other than the body and a gasket? Does anyone have a diagram showing part numbers?

__________________
Jim Condax
1999 E320-167K
1985 300SD-160K
1986 Porsche 928S-98K