Hello I'm new here. I had a question. I changed my spark plugs a few days ago and a few of them had oil on them. My valve cover gasket is no longer good so I'm gonna b changing it. I was told by someone that I need spark plug tube seals because of the oil on spark plugs. Then I was told by someone else that the 2004 Mercedes E320 does not have spark plug tube seals. I can't seem 2 find them does anyone know 4 sure if this car has them or not. Thank u