MB engines are from the factory exceed most "chevy blueprinted" specs.

Everything is balanced to higher standards. Go with the factory manual and make sure your machine shop is does MB work. IF they bore for clearance the way most do american V8- you won't hit the factory wear limits.
Valve guides need to be final reamed to the correct size... again most machine shops are not setup to do benz work.

If you've kept up with oil changes- doubt the crank will need grinding. Lower ends are strong..

Michael

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Michael McGuire
83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E