My Estoril has the same issue. Also I was losing chunks of paint on the roof starting ai the top of the wind screen. I had it repainted. The had to strip back about half way down the roof before it was solid.

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2003 X5 4.6is Estoril Blue
2005 Infiniti G35X
1972 Datsun 240Z
1991 Isuzu Impulse XS Sold
1972 Fiat 850 Spyder Donated
1972 Datsun 240Z Sold
1972 Datsun 510 Sold