2004 S55 , 2005 S55 , 2004 S430
So one of my coils on my s55 appears to be leaking oil or some kind of fluid. I've cleaned it off several times and it returns. It can't be coming from valve cover cause those have been resealed and painted. Actually had to repair right valve cover cause magnesium had oxidized away creating small hole. There is no oil in air cleaner assembly and the oil is only on the one coil and only on top where the resin is used in the manufacturing. I know the old canister style coils in the 60's thru the 70's had oil inside them but these modern coils I thought were constructed differently. It seems to be working no misfires and I have a new one bosch coil to replace it with. Was just curious has anyone else seen this on there coils? When i get this one off I'm going to cut it open to see what its insides look like. Maybe they can bleed.