Exhaust system
Drive
61
b
Introduction of the New A-Class, Model Series 176
General
The exhaust system in all the engine variants
consists of high-quality, corrosion-resistant chro-
mium and chromium-nickel steels which ensure a
long service life.
On the gasoline engine the exhaust system is
equipped with a standard connecting point
between the decoupling element and front muffler
as well as a replacement-part connecting point
between the front and rear muffler.
On the diesel engine the standard connecting point
is located between the oxidation catalytic converter
and the decoupling element.
Gasoline engine M 270 DEH
The exhaust system of gasoline engine M 270
consists of:
• Catalytic converter
• Decoupling element
• Front muffler
• Rear muffler
On the basic model, the exhaust flows out of the
rear muffler, which has a shell design, through a
tailpipe which is located in a concealed position
behind the bumper. Depending on the equipment
package involved, a twin-pipe exhaust system with
two visible exhaust tips is installed.
Diesel engine OM 651
The exhaust system of the 4-cylinder OM 651 diesel
engine consists of:
• Decoupling element
• Oxidation catalytic converter
• Diesel particulate filter
• Rear muffler
All diesel models feature a diesel particulate filter
(DPF) as standard. Some national versions may
deviate from this due to different emissions stan-
dards.
Catalytic converter system with particulate
filter
The catalytic converter system includes a shared
housing in the underfloor, which contains an oxida-
tion catalytic converter with a particulate filter
behind it. The particulate filter is made of silicone
carbide and is able to filter solid particles out of the
exhaust gas at separation rates of over 98% relative
to the particulate mass.
– This printout will not be recorded by the update service. Status: 06 / 2012 –
