crank a rod bearings is going to expensive man ,
First the engine has to come out, then the oil pan and pump out, crankshaft out, measure and mic all the lobes at a good manchine shop ,get it all checked out for specs and polished, might has well get it knife cut while your at it , new bearings (the right size ) , with the engine bottom end part might has well check out the pistons rings and bores, and hope they are all OK ,

if you could do everything yourself and bring the crank down to a machineshop it would be around 200-500 bucks total and about a good 10-12 hours of your time within a few days

if you are going to take it in to someone i would think around 7-8 K if everything is within spec, if not get ready cash out 8-rods 8-pistons 8-of everything 10-15K maybe

good luck

Dave

190e 16v
C36 AMG