Contents Preface 5 Overview Brief description 6 Engine data 7 Highlights 8 Engine views 9 System comparison 10 At a glance 11 Mechanical system Crankcase 12 Cylinder head 13 Oil pan 14 Crankshaft assembly 15 Valve assembly 17 Gear drive 18 Belt drive 19 Combustion Common rail injection 20 Charging 24 Air supply 29 Exhaust system 32 Exhaust system 34 3 Introduction of New Generation of 4-Cylinder Inline Engines, OM 651 q – This printout will not be recorded by the update service. Status: 09 / 2008 –