I've just been daily driving my X5 4.6 for the past few weeks. The AC system in it works so much better than the AC in my 2000 540it— it's made the 110ºF days bearable.

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2003 X5 4.6 | 2000 540i Touring

Formerly owned:
2004 Range Rover | 2000 M5 | 2000 540i/6
1995 750il | 2003 Mercedes S500 | 2003 540i/6