engatwork: Im not sure how much they shaved, but it was banana warped and had to be resurfaced. I had them replace the valve seals/guides and clean it up while they were at it. Total cost: $345.
ronald: no I didn't make a site, but in retrospect I should've chronicled the process with pics/etc and pitfalls/tips along the way. It would've made an excellent DIY article. I've removed the head twice now, the second time took half the time of first. With what I know now I could probably remove it in roughly 4 hours without a lift.
'91 300E, 215K miles