has anyone installed piston rings?
 

Has anyone installed goetz piston rings on a 1985 300d turbo? Is there any top or bottom on the two piece oil ring?

Even if someone on the forum installed a set from that same company you would not be assured that your set was exactly the same...
Seems like asking the company which made them would be the only safe way to find that out.... you would not want them channelling the oil the wrong direction...