Quote:
Originally Posted by stevehifi
My guess is that it probably improves road noise.
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We have a winner........its a tar type substance that every car dealer in the world will over you as an up-charge that supposedly reduces road noise. Perhaps your dealers were instructed by BMW to add it on to cut down on noise or BMW put it on at the factory. Either way, its messy to put on and is generally something you have to buy from the dealer as an a la carte option so if you got it direct from the factory that way there is another thing you get for free
