Hi All,
Would appreciate if anyone have observed this phenomenum. I sent my 98 ML to the dealer for an oil change (synthetic) this Tue. Today as I was checking the oil level and opened up the cap, I found some milky yellowish emulsion underneath the cap and the filler neck where engine oil goes in. First I didn't think of it, I cleaned it up and closed the cap. After about 2 hours when the engine cooled off, I reopen the cap and fould some water condensed unerneath the cap and around the neck. I checked the coolant level and there was no loss of coolant. Where does the water come from? This explains why I saw emulsion around the cap area. When I pull the dip tube stick to check oil level, the oil came out there was clean and transparent, no sign of emulsion.
Does any ML owner seen this before? I don't recall seeing this in my previous oil changes (all synthetic) and it does not appear on my other car either. What gives?

Thanks
steve