You might try adjusting the two rubber stops on either side of the tailgate. Raise them a couple of millimeters and this will put more tension on the closed tailgate, causing it to pop up slightly when it's unlatched by the fob button. I notice my tailgate pops up a small amount when unlatched remotely.

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)