Thanks for the fast response, here is the section of the service manual I was referring to.

http://www.furi-dorifto.com/tech/MB_w124_Manual/W126/w126CD1/program/Engine/617/03-316-1.pdf

I would assume that as long as I put the two pistons with the '1' designation in their respective bores, I would be ok just to order 5 sets of normal rings and be done?