[Swizzles]

But it turned out to be the oil filler cap gasket. Easy DIY fix and the part was $3.50 Canadian. Got some good help from mercedesshop.com original thread is their. http://www.mercedesshop.com/shopforum/showthread.php3?t=127891

If that link shows up[:(!]

You can also see some pictures of the problem and cure at http://www.furgasonhomes.com/ml/fillergasket.htm

Thanks all hope this helps someone out their.