have changed propshaft on a couple of vitos (4x4)
Stupidly expensive (4k+vat from merc stealership)
can change just the bearing (300£+vat)but will not be a lasting repair because of the universal joints are worn out and merc will not sell you new ones(at least not here in norway).
will see if i can find the part nr for the universal joints(buy mine from a tractor parts company) and the bearing.