I'm going to remove the trunk floor, cargo cover and drive around for a few mins to see if any of these are causing the rattle.

If not, i'll go and purchase the spring loaded bumpers. Are they hard to install/do you have a part number?

Regards

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2007 E70 X5 3.0D Black/Beige - SOLD
2012 E70 X5 40D Silver/Black