Yeah, that’s a similar pattern to the last ones on my X250.I’ve not just got greater wear on the inner pad, the wear pattern is very strange too. The lip on the outer edge tapers so there is more wear towards the centre of the disc. Never seen anything like it.
The left is the inner side, not a great drawing but it hopefully gets the point across.
Changed the discs and pads together. If you recall, this was the time I had the brake failure due to a rear pipe warring through. I had to bleed the system.
Sold the car about 8 weeks later so I never found out if the brake bleed helped.
Might be worth getting the fluid changed to achieve a full bleed and see how it goes after that.