the dealer suggested I do some test
whisch I did
water gets under the rubber washer just between the window and the wiper arm, just by spraying some water...like a small rainfall
..its kind of loose there, did not want to tighten it, I will let the dealer look at it next week
the water accumulated underneath the plastic cover of the upper tailgate
and it will need to be replaced to

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j-p - montréal
2007 X5 4,8, saphire black, saddle brown, sport package SOLD
2011 X5 Diesel