Leakage at the carbin filter enclosure

[Liam Z]

Just bought the brand new MGS5 2 days ago, found the carbin filter is wet and dirty, there must be some leakage from the enclosure but I don't know where, everything seems tight, checked the rest of the stock at the dealer, the same, all cars (S5) have the same issue.

Could you check yours, anybody has the same thing, how to solve that?
Thanks!