Originally Posted by bruce.augenstein@comcast.
Several people in this forum have already corrected me and explained that it would not be particularly expensive to measure and keep track of piston sizes, and offer them up as each cylinder is precision measured.
Originally Posted by swamp2
I suppose it is relative, it would certainly add time and cost. Exactly how much is largely speculative by the vast majority of folks here on this forum. MB either decided it was too expensive, did not offer benefits based on the existing precision of their parts or some combination of cost/benefit was not high enough.
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