I just bought a recond e60, after awhile of driving it, I can hear "Enk Enk" sound from all doors. I check with others, they said is because the door rubber touched the body, must rub with oil to the rubber. OR after car wash no sound at all (But only can tahan 2 days...hahahaha) So I need to ask: (1) It is all the e60 face this problem?(2) I heard that AB got sell the sticker to stick on the body, so that the door's rubber won't touch the body...IS IT TRUE??????(3) Someone got any better way to solve this????Regards,Jose