MB-Freigabe or MB-Approval (gasoline engines)
Gasoline engines
MB-Freigabe or MB-
Approval
M274
229.5
1)
1) Recommended for lowest possible fuel consumption (lowest SAE
viscosity class in each case; observe possible restrictions of the
approved SAE viscosity classes).
MB-Freigabe or MB-Approval (diesel engines)
Diesel engines
MB-Freigabe or MB-
Approval
OM642
OM651
228.51, 229.31,
229.51, 229.52
1)
OM654
228.51, 229.31,
229.51, 229.52,
229.71
1)
1) Recommended for lowest possible fuel consumption (lowest SAE
viscosity class in each case; observe possible restrictions of the
approved SAE viscosity classes).
To achieve the lowest possible fuel consumption, it
is recommended to use the engine oil specifica-
tions marked in the table for the lowest SAE vis-
cosity class. Observe any possible restrictions of
the approved SAE viscosity classes.
%
If the engine oils listed in the table are not
available, you may add a maximum 1.1 US qt
(1.0 liter) of the following engine oils once
only:
Vehicles with gasoline engines: MB-Freigabe
or MB-Approval 229.3 or ACEA A3/B4
Vehicles with diesel engines: MB-Freigabe or
MB-Approval 228.5, 229.3 or 229.5
Multigrade engine oils of the prescribed SAE vis-
cosity class may be used all year round, taking the
outside temperature into account.
Viscosity of the engine oil
*
NOTE Engine damage due to incorrect SAE
classification (viscosity) of the engine oil
If the SAE classification (viscosity) of the
engine oil added is not suitable for prolonged
low outside temperatures, it may cause engine
damage.
The temperature readings of the SAE classifi-
cation are always based on fresh oil. Engine oil
ages when driving as a result of soot and fuel
residue. The characteristics of engine oil dete-
riorate significantly at low outside tempera-
tures.
#
Use an engine oil of the appropriate SAE
classification at low outside tempera-
tures.
#
Use oil for all-year-round operation.
The temperature readings of the SAE viscosity
class are always based on fresh oil. The tempera-
ture characteristics of the engine oil, especially at
low outside temperatures, can deteriorate signifi-
cantly due to aging during driving.
Therefore, Mercedes-Benz recommends that you
change the engine oil before the start of the cold
season. Use only an approved engine oil in the pre-
scribed SAE viscosity class for this purpose.
The viscosity indicates the flow characteristics of a
fluid. With regard to engine oil, a high viscosity is
synonymous with thick liquid and a low viscosity
with thin liquid. Depending on the outside temper-
atures, select the engine oil according to the SAE
viscosity class. The table shows the SAE viscosity
class to be used. The low temperature characteris-
tics of engine oils can deteriorate significantly dur-
ing operation due to aging, soot and fuel accretion,
for example. A regular oil change with an approved
engine oil in the appropriate SAE viscosity class is
therefore strongly recommended.
Additives
*
NOTE Engine damage due to use of addi-
tives in the engine oil
The use of additional additives in the engine oil
can damage the engine.
#
Do not use any additional additives in the
engine oil.
Miscibility of engine oil
Mixing oil reduces the benefits of high-quality
engine oils.
Technical data 291