Exhaust System - Mercedes-Benz E-Class Series 207 Service Manual

Exhaust system

E 350, E 350 CGI, E 500
The exhaust system of the V6 gasoline engines
(M 272) and the V8 gasoline engine (M 273)
features one of the following for each cylinder bank:
• Firewall catalytic converter
• Front muffler
• Underfloor catalytic converter
• Center muffler
• Rear muffler
The connecting points in the exhaust system are
located downstream of the air gap-insulated mani-
fold, downstream of the underfloor catalytic
converter and downstream of the center muffler.
Vehicles with M 272 are fitted with a trim finisher
on the tail pipe, while with the M 273 the finisher is
integrated in the bumper cover.
Exhaust system M 272 (E 350 CGI Coupé)
1 Firewall catalytic converter
2 NO catalytic converter
x
B16 Temp. sensor upstream of NOx CAT, right
B16/1 Temp. sensor upstream of NOx CAT, left
G3/3 Left O
2
G3/4 Right O
48
Introduction of the New E-Class Coupé, Model Series 207
b
sensor upstream of CAT
sensor upstream of CAT
2
– This printout will not be recorded by the update service. Status: 01 / 2009 –
NO catalytic converter
x
In engines with direct injection (CGI) and lean
combustion, an additional NO
is installed to effectively convert the high nitrogen
oxide components (NO ) that occur during stratified
x
operation of the engine.
The exhaust system of the E 350 CGI Coupé with
engine M 272.982 features one of the following for
each cylinder bank:
• Firewall catalytic converter
• NO catalytic converter
x
• Center muffler
• Rear muffler
G3/5 Left O sensor downstream of CAT
2
G3/6 Right O sensor downstream of CAT
2
N37/5 Left NO (nitrogen oxides) control unit
x
N37/5b1 Left NO (nitrogen oxides) sensor
x
N37/6 Right NO (nitrogen oxides) control unit
x
N37/6b1 Right NO (nitrogen oxides) sensor
x
catalytic converter
x
P49.10-2880-00