I would bring the X to shop Tranny expert ... Here is a ton of infos on trans fluid changed (as i did) with no regrets...http://www.xoutpost.com/bmw-sav-foru...2-4-4i-27.html

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2006 X5 4.4i premium, Sport package ,Winter Package, Sat Nav. AFE Power stage II Production : 08-2006
2012 BMW 128I Convertible Black
2011 Mercedes Benz B200 sold