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Setting the oil quality
When the on-board computer displays the 4
symbol and you top up the displayed oil filling
capacity, observe the following:
if you top up or add a lower quality engine oil,
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set the lower quality (Sheet No.) on the on-
board computer.
do not set the higher quality (Sheet No.) on
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the on-board computer if you are topping up
with a higher quality engine oil.
Set the Sheet No. (quality grade) of the engine oil
on the on-board computer .
Transmission oils
General notes
* NOTE Damage to the transmission
The transmission can be damaged when
changing from synthetic to mineral transmis‐
sion oil.
Before changing, check whether a min‐
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eral transmission oil is permissible.
Information is available in a Mercedes-
Benz Service Centre.
The drive axles and the transmission are filled at
the factory with a high-quality synthetic oil.
The planetary hub reduction axles are filled with
mineral oil.
Only use the following oils for the transmission:
in automatic transmissions, only transmission
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oils according to sheet‑no. 236.91
in automated manual transmissions, only
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transmission oils according to
sheet‑no. 235.11
Transmission oil quality
You can check the quality grade (sheet‑no) of the
added transmission oil in the on-board com‐
puter .
Notes on coolant
& WARNING Risk of fire‑ and injury from
antifreeze
If antifreeze comes into contact with hot com‐
ponent parts in the engine compartment, it
may ignite.
Allow the engine to cool down before
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you top up the antifreeze.
Make sure that no antifreeze spills out
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next to the filler opening.
Thoroughly clean the antifreeze from
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component parts before starting the
vehicle.
A coolant that ensures anti-corrosion/antifreeze
protection and other important protective effects
is added at the factory.
Coolant is a mixture of water and corrosion inhib‐
itor/antifreeze agent.
The corrosion inhibitor/antifreeze agent in the
coolant has the following properties:
heat dissipation
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anti-corrosion protection
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cavitation protection (protection against pit‐
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ting)
antifreeze protection
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increases the boiling point
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Leave the coolant in the engine cooling system all
year round – even in countries with high outside
temperatures.
Check the concentration of the corrosion inhibi‐
tor/antifreeze agent in the coolant every six
months.
Only use approved corrosion inhibitor/antifreeze
agent according to Sheet No. 325.5. This will
help prevent damage to the engine cooling sys‐
tem and the engine.
When renewing the coolant, ensure that the cool‐
ant contains 50% corrosion inhibitor/antifreeze
agent by volume. This corresponds to antifreeze
protection down to -37°C.
Do not exceed 55% by volume (antifreeze protec‐
tion down to approx. -45°C). Heat dissipation and
antifreeze protection may otherwise deteriorate.
In the event of coolant loss, do not just top up
with water, but also proportionally with an
approved corrosion inhibitor/antifreeze agent.
The water used in coolant must meet specific
requirements, which are often met by drinking
water. Have the water treated if the water quality
is not sufficient.
Mix the water and the corrosion inhibitor/anti‐
freeze agent together externally of the coolant
circuit. Then subsequently fill the mixture in the
coolant expansion reservoir.
Technical data 387
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