Did you jack up the side and look under the folds to look for cracks in the bag? I'm not discounting you, but you mentioned the fuse was blown (fuse 87 for the compressor)

-Usually that happens when the compressor is working double time to inflate the bags because they are leaking and it usually blows from running too much. You can also blow the seal out on the compressor if this happens

Since your X is 13 years old with 146k I'd definitely be double certain that its the bags intact.

If the X leaks down on that side overnight again, you'll know for certain.

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards