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Service products
338
Miscibility of engine oils
The benefits of high-quality engine oils are
diminished if you mix them.
Engine oils are differentiated according to:
engine oil brand
R
quality grade (Sheet No.)
R
SAE viscosity class
R
If, in exceptional circumstances, the type of
engine oil currently used is not available,
another engine oil approved for Mercedes-
Benz may be used.
Setting the oil quality
! If the on-board computer shows the 4
symbol and you top up with the quantity of
oil displayed in the on-board computer,
note the following:
If you top up with an engine oil of a lower
R
quality, set the lower quality (Sheet no.)
in the on-board computer.
If you top up with an engine oil of a higher
R
quality, do not set the higher quality
(Sheet no.) in the on-board computer.
X
Set the Sheet No. (quality grade) of the
engine oil in the on-board computer
(
Y
page 162).
Transmission oils
General notes
! When changing the oil, if you replace the
synthetic oil with a mineral transmission
oil, you may damage the assembly. Before
the oil change, check whether the use of a
mineral transmission oil is permitted. Infor-
mation is available from any Mercedes-
Benz Service Centre.
At the factory, drive axles, transmission and
the PTO shaft gear are filled with a high-qual-
ity synthetic oil.
The planetary axles are filled with mineral oil.
Transmission oil grade
The quality grade (Sheet No.) of the transmis-
sion oil used can be checked and changed in
the on-board computer (
Coolant
G
WARNING
If antifreeze comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you top up
the antifreeze. Make sure that antifreeze is
not spilled next to the filler neck. Thoroughly
clean the antifreeze from components before
starting the engine.
A coolant that ensures anti-corrosion/anti-
freeze protection and other important pro-
tective effects is filled at the factory.
The coolant is a mixture of water and corro-
sion inhibitor/antifreeze.
The corrosion inhibitor/antifreeze in the cool-
ant has the following properties:
heat transfer
R
anti-corrosion protection
R
cavitation protection (protection against
R
pitting)
antifreeze protection
R
raising the boiling point
R
Leave the coolant in the engine cooling sys-
tem all year round – even in countries with
high outside temperatures.
Check the corrosion inhibitor/antifreeze con-
centration in the coolant every six months.
Renew the coolant every 3 years.
Only use approved corrosion inhibitor/anti-
freeze in accordance with Sheet No. 325.5,
®
®
e.g. Glysantin
G40
to the engine cooling system and engine.
When renewing the coolant, ensure that it
contains 50% antifreeze/corrosion inhibitor
by volume. This corresponds to antifreeze
protection down to Ò37 †.
Y
page 162).
. This prevents damage
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