Manny-

Why is an I6 engine more expensive to build?

If it is, is this a good thing? How so?

Are the parts more expensive? The labor involved?

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E