Forum members,
I'm getting ready to do the timing chain on the 99' E300. I currently have 4 degrees of "chain stretch" according to my last test. My understanding is 5 degrees is replacement point. What else should be addressed while in there?

I replaced my headgasket in August 2011 along with a whole ton of parts during that project. Here's what was replaced: Water pump, viton fuel return lines, valve cover gasket, injectors tested/fixed by bosch shop, fan clutch, radiator, radiator hoses, white plastic fuel lines... and more stuff that I'm forgetting.

What else should be checked while the timing chain is being replaced?

__________________
Ed
-1984 Mercedes 190D 2.2 5-speed gray market(bought@30,000 miles) (Sold back to original owner@170,000 miles)
-1999 Mercedes E300DT (245,000 miles)
-1999 Mercedes S500 Grand Edition (80,000 miles)