Emmy,
I was able to remove 15 rocker arms without breaking an oiler fitting, then on the 16 i cracked one with the valve spring compressor. Cheap to have on hand, and if you need them, it will save a few days. My old ones were brittle. I could have used the old tubes, but i replaced them anyway, kept the old ones for "what if". Hope this helps.
P.S. I have a spare master link if you want it. Chain comes with one, but i ordered another just in case--didn't need it.

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Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)