May not be the correct answer, but, I would check the ball joints... I chased this for a while, and replacing the ball joints is what took care of it... A little play in a ball joint is magnified in a big way at times...

Another thing, last week I found a thread that told about the rear hatch bump stops and I adjusted those outward and that got rid of a VERY annoying rattle... These are the bump stops that the rear hatch rest on when closed. Located on the left and right channels in the hatch openening when the upper hatch is open they can bee seen... Evidently the rubber stops wear over time, and losening the torx screw in each one and unscrewing the rubber stop outward takes up the slack... It got rid of some irrating noises, and took only a few minutes..


Just my 2cents..

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Pup
2006 BMW X5 4.4i Sport Package 105k miles Imola Red
2000 Porsche 986S. Boxster S 50k miles Silver with Black leather, convertable, and Factory hardtop
2015 Mini Cooper S 4 door, Blazing Red Metallic, white roof and mirrors, black leather, cold climate pkg, Sport Pkg