I finished this job yesterday and I may be stating the obvious, but for those who attempt this in the future, realize that the bolts are two different lengths. I found out the hard way when the shaft wouldn't turn without hitting something. (longer bolt was in shorter bolt hole)

I was able to pry the shaft back, to give me room to change out the disc. Easy DIY job as Mike stated above.

Good luck

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-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi