I bet it is your front windshield gasket. Pull up on the out rubber lip. Does it snap back or return slowly? Does the part that is thick and close to the glass have any parts that are lifted away from the glass? If so it is the gasket. Not too bad a job to do ... as long as you don't break the glass!

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)