Diesel Engine Om 642 - Mercedes-Benz 212 Sedan E-Class Service Manual

Diesel engine OM 642

To complement the 4-cylinder diesel engines, the
advanced 6-cylinder diesel engine 642 will be avail-
able in the E 350 CDI on the market launch of model
series 212.
The main technical innovations of the 6-cylinder diesel
engine 642.850 are:
• Suction-regulated high-pressure pump
• Injectors with optimized orifice geometry to reduce
pollutant emissions
• Heated fuel main filter
OM 642.850 in model E 350 CDI
1 Air filter housing upper section
2 Engine air intake duct
46
Introduction of the New E-Class, Model Series 212 Sedan
b
– This printout will not be recorded by the update service. Status: 01 / 2009 –
• Quick glow system with glow output stage
(ceramic glow plugs)
• Reduced compression ratio
• Intake camshaft with sensor ring for improved
emergency running characteristics
• Heated coolant thermostat
• Two-piece encapsulation of the exhaust manifold
• Maintenance-friendly air filter attachment
(see picture)
• Compliance with the EU 5 emissions standard
3 Air filter housing lower section
P01.10-2975-00