Exhaust system
38
Powerplant
g
Introduction of the New G-Class, Model Series 463
M 273
The exhaust system of the M 273 consists of two fire-
wall catalytic converters which are directly down-
stream of the left and right exhaust manifold.
Once the exhaust has left the two firewall catalytic
converters, it flows through the front muffler. From
there, it passes through the center muffler before
leaving the exhaust system through the tailpipes.
OM 642
The exhaust system of diesel engine OM 642 consists
of an oxidation catalytic converter, a diesel particulate
filter and an SCR catalytic converter. The exhaust
system has an SCR catalytic converter with a volume
of approx. 15 liters at the vehicle rear. Here, harmful
nitrogen oxides are reduced through the injection of
the AdBlue
®
urea solution. The exhaust system also
has two noise-damping reflection chambers.
P49.10-3001-00
View of exhaust system of engine OM 642
1
Oxidation catalytic converter
2
Diesel particulate filter
3
SCR catalytic converter
B16/15
Temperature sensor upstream of SCR catalytic
converter
B19/7
Temperature sensor upstream of catalytic
converter
B19/9
Temperature sensor upstream of diesel
particulate filter
B28/8
Diesel particulate filter differential pressure
sensor
G3/2
Oxygen sensor upstream of catalytic converter
N37/7
NO
x
sensor control unit downstream of diesel
particulate filter
N37/7b1 NO
x
sensor downstream of diesel particulate
filter
N37/8
NO
x
sensor control unit downstream of SCR
catalytic converter
N37/8b1 NO
x
sensor downstream of SCR catalytic
converter
Y129 AdBlue
®
metering valve
– This printout will not be recorded by the update service. Status: 03 / 2012 –
