Mercedes-Benz Repair Guides

When working on the OM654 balance-shaft module, both its position relative to the crankshaft and the preload of the split gears must remain controlled. This guide explains the correct procedure, required tools and final checks.

Learn why camshaft sprockets with backlash compensation must be pretensioned on Mercedes M256, OM654 and OM656 engines. Step-by-step procedure, technical explanation and important workshop tips.