If the SAE class (viscosity) of the engine oil
used is
not suitable for continually low out-
side temperatures below −20 †, this could
cause engine damage.
The specified temperatures of the SAE
class always refer to freshly added oil.
Engine oil ages during driving due to soot
and fuel residue. This impairs the charac-
teristics of the engine oil, particularly at low
outside temperatures.
Mercedes-Benz strongly recommends that,
at outside temperatures below −20 †, you
use engine oils of SAE class 5W-30.
Engine oil SAE classes (viscosity)
:
Single-grade engine oils
;
Multi-grade engine oils
X
Select the SAE class of engine oil in accord-
ance with outside temperatures.
i
You can only achieve the maximum oil
change intervals by using engine oils of
particularly
high
quality (e.g. in accordance
with Sheet no. 228.5 of the Mercedes-Benz
Specifications for Service Products).
H
Environmental note
If you operate your vehicle using FAME fatty
acid
methyl
ester fuel (bio-diesel), special pre-
cautions must be taken and national specifi-
cations complied with when disposing of
engine oils. Information is available from any
Mercedes-Benz or MTU Service Centre.
Adding/topping up the engine oil
Do not add too much oil. If you add too much
oil, the
engine or the catalytic converter could
be damaged. Drain or siphon off any excess
oil.
When topping up, Mercedes-Benz recom-
mends that you only use engine oil of the
same grade and SAE class as the oil filled at
the last oil change.
Check the oil level before topping up the
engine oil (Y page 34).
You can find more information on topping up
the engine oil in the “Changing the engine oil
and filter” section (Y page 62).
Miscibility of engine oils
The benefits of high-quality engine oils are
diminished if you mix them.
Engine oils are differentiated according to:
R
engine oil brand
R
quality grade (Sheet no.)
R
SAE viscosity class
If, in exceptional circumstances, the type of
engine oil currently used in the engine is not
available,
another
mineral or synthetic engine
oil may be used. Make sure it is approved for
Mercedes-Benz.
Observe the notes in the Service Booklet.
Coolants
Coolant additive with antifreeze prop-
erties
The coolant is a mixture of water and corro-
sion inhibitor/antifreeze.
48
Service products
Maintenance and care
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