Exhaust gas aftertreatment
The vehicle must be operated with DEF
®
if the
exhaust gas aftertreatment system is to function
correctly.
If you operate the vehicle without DEF
®
or with
emissions-relevant malfunctions, the legal operat-
ing permit is invalidated. The vehicle could be pro-
hibited from public road use by an official ordi-
nance.
It may be improper or punishable in some coun-
tries to operate a vehicle that uses no DEF
®
or one
that does not comply with the specifications of this
operator's manual.
Engine management monitors the exhaust gas
aftertreatment components for compliance with
emissions laws and regulations. If you attempt to
operate the vehicle without DEF
®
, with diluted
DEF
®
or with a different reducing agent, this will
be detected by the engine management. Other
emissions-relevant malfunctions, e.g. metering
malfunctions or sensor errors, are also detected
and logged.
The engine management system subsequently pre-
vents the engine being restarted after issuing a
warning message.
Therefore refill DEF
®
tank regularly during vehicle
operation or, at the latest, after receiving the first
warning message via the instrument cluster.
consumption and filling quantity
DEF
®
consumption
Like fuel consumption, DEF
®
consumption is highly
dependent upon driving style and operating condi-
tions. DEF
®
consumption is usually within a range
of 0 and 10% of the fuel consumption. If necessary,
DEF
®
must be refilled in accordance with the
instructions when the refill message is displayed in
the instrument cluster. This may also be necessary
between the scheduled maintenance.
Total capacity of DEF
®
tank
Model
Total capacity
All models
5.8 gal (22 liters )
Observe the notes on operating fluids
(
/
page 285).
*
NOTE Engine damage caused by an incor-
rect oil filter, incorrect oil or additives
#
Do not use engine oils or oil filters other
than those which meet the specifications
necessary for the prescribed service
intervals.
#
Do not alter the engine oil or oil filter in
order to achieve longer change intervals
than prescribed.
#
Do not use additives.
#
Have the engine oil changed after the
prescribed intervals.
Mercedes-Benz recommends having the oil
changed at a qualified specialist workshop.
Further information on engine oil and oil filters:
R
in the MB Specifications for operating fluids at
https://operatingfluids.mercedes-benz.com
(under specification designation).
R
at a qualified specialist workshop
Engine oil quality and filling capacity
%
The containers of the various engine oils are
marked with the ACEA (Association of Euro-
pean Automotive Manufacturers) and/or API
(American Petroleum Institute) classifications.
Use only approved engine oils that correspond
to the MB Specifications for Operating Fluids
and the prescribed ACEA and/or API classifi-
cations named below. Engine oils of other
grades are not permissible and may result in
the loss of the New Vehicle Limited Warranty.
The use of other engine oils not approved for
diesel engines can damage the diesel particu-
late filter (DPF).
290 Technical data
