I’ve got an 02 ML500 that has a leaking valve cover on the passenger side, it drips onto the exhaust and smells terrible. I already tried replacing it, but it still leaked, so I just thought the new gasket was bad, so I got a replacement one and it still leaks, but not as bad. It was tightened evenly in a criss-cross pattern. I’m thinking about just putting a bunch of sealant on the outside and calling it good, but I don’t wanna do that if I don’t have to. Any ideas?