I got my new 335I convertible at the end of may. I have been noticing a stringy black rubbery substance on my car were the three pieces come together. I took it back to the dealer and show my sales person and he just said it was a lubricate, which doesn't make sense because it is rubber on rubber. If you open the top half way you can see the rubbery substance, especially when it is hot out. My question is has this happened to anyone else, and if so did it go away.