RB, I believe it just depends on the weather in your area. Does the vehicle look nicer with the delete, to me it absolutely does. But with my weather I'd not be able to go a few minutes (not exaggerating here sadly) on certain days. Sadly with our freeze/thaw cycles we get a LOT of window dirt. And these x5's love to cyclone dirt onto rear windows. But again,if I lived where they were not a necessity, I'd remove it too.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S