Putting the spare on that corner will almost always confirm if it's the bearing. Sometimes makes the sound worse but usually makes it go away.

The first bearing I needed to replace was front right and it was perfectly silent until I traded a pair of my 255s to my wife so she could have square setup while I was getting some tires mounted. I put our two 245 spares on my front and from my moment I drove it sounded like I had sand in my bearings.

I put one 255 on at a time and it was Instant detection which corner was at fault. I've used the method ever since and it's 100% detection. 235s (and apparently 245s) will push the top of the wheel out and 255s will push the top of the wheel in. This has worked with 7.5, 8.0 and I think 8.5" rims but unsure of the ET on each just know due whatever rims I've used it's worked. The basic crappy 17" rim used for the 235 spare is the perfect test case.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)