Mercedes won't cover it. Partly due to their lack of willingness, partly due to poor documentation on my father's end.

I am going to go ahead and re-ring the engine, and replace the valve seals while I have it apart. I have a few questions based on research that I have done.

Does this engine have the aluminum cylinder sleeves?
Are these a replaceable item, or should the cylinder walls be re-honed if they are scored?

Who publishes the best shop manual for this car?