I would suggest you have it "flatbedded" to the shop. Much cheaper than replacing a tranny or the like if you break it towing.
I know that our 2013 requires you to go up underneath the vehicle to disengage the transmission and the parking brake is released from inside the trunk. Should be instructions in an online manual.

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2021 X5 xDrive40i
2015 X5 xDrive35i MSport
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