Originally Posted by BMRLVR
It is possible that blocks and pistons are picked as sets that are pre-matched.
Notice that the connecting rod on the cap has a 2D bar code on it. That bar code can contain lots of information that "MAY"
be used to ensure the pistons, rods, crank and blocks are picked in a matched set........ Or........ it could just be a part number
At a guess, if Mercedes was actually matching pistons with individual cylinders, they'd say so.
On the other hand, mentioning that sort of activity essentially declares that there are variations in the manufacturing/machining processes, which might make a casual viewer wonder about quality control.
That settles it. Swamp has to go visit the plant and bring back The Truth