Date registered: Feb 2007
Vehicle: 03 E320 4M Wagon & 97 E320
Mentioned: 0 Post(s)
Quoted: 12 Post(s)
I think the OP said the leak is from between the oil filler neck and the valve cover, not from the valve cover gasket.
You described the removal of the oil filler neck so the OP just needs to replace the O ring on the bottom of the neck.
The neck is removed like the filler cap (turning counter-clockwise), once the lock tab on the driver's side is released, no?