| BMW has a special lubricant for all the rubber window and door seals. It is teflon gel made by a company called CarbaFlo. The tube says CarbaFlo KSP105. I don't recomend asking the price since you'll have a coronary. If they have any ask them to apply it for you. This is the replacement for the product referred to as "Gummi Pfledge." Be sure to remove all traces of silicone from the seals prior to treatment or the stuff won't adhere. | 
