Mercedes-Benz S-Class 2020 Owner's Manual page 366

Turn cap 1 anti-clockwise and remove it.
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Top up the engine oil.
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Replace cap 1 and turn it clockwise until it
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engages.
Check the oil level again (
/
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Checking the coolant level
& 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
#
touch component parts described in
the following.
& WARNING Risk of scalding from hot
coolant
If you open the cap, you could be scalded.
Let the motor cool down before opening
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the cap.
When opening the cap, wear protective
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gloves and safety glasses.
Open the cap slowly to release pres‐
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page 361).
sure.
Only have the coolant checked or refilled at a
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qualified specialist workshop.
Maintenance and care 363
Topping up the windscreen washer system
& 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
#
touch component parts described in
the following.
& WARNING ‑ Risk of fire and injury due to
windscreen washer concentrate
Windscreen washer concentrate is highly
flammable. It could ignite if it comes into
contact with hot engine component parts or
the exhaust system.
Make sure that no windscreen washer
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concentrate spills out next to the filler
opening.