Mercedes-Benz C-Class Convertible 2021 Operator's Manual page 323

Refilling engine oil
& WARNING Risk of burns from hot com‐
ponent parts in the engine compartment
Certain component parts in the engine com‐
partment can be very hot, e.g. the engine,
the cooler and parts of the exhaust system.
Allow the engine to cool down and only
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touch component parts described in
the following.
& WARNING Risk of fire and injury from
engine oil
If engine oil comes into contact with hot
component parts in the engine compart‐
ment, it may ignite.
Make sure that no engine oil is spilled
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next to the filler opening.
Allow the engine to cool off and thor‐
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oughly clean the engine oil from compo‐
nent parts before starting the vehicle.
* NOTE Engine damage caused by an
incorrect oil filter, incorrect oil or addi‐
tives
Do not use engine oils or oil filters
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which do not correspond to the specifi‐
cations explicitly prescribed for the
service intervals.
Follow the instructions on the service
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interval display for changing the engine
oil and observe the prescribed change
intervals.
Do not use additives.
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* NOTE Damage caused by refilling too
much engine oil
Too much engine oil can damage the engine
or the catalytic converter.
Have excess engine oil removed at a
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qualified specialist workshop.
%
Depending on driving style, the vehicle con‐
sumes up to 0.9 US qt (0.8 liter) of oil per
600 miles (1000 km). The oil consumption
Maintenance and care 321
may be higher than this when the vehicle is
new or if you frequently drive at high engine
speeds.
Turn cap 1 counter-clockwise and remove
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it.
Add engine oil.
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Replace cap 1 and turn it clockwise until it
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engages.