Mercedes-Benz C-Class Convertible 2021 Operator's Manual page 322

320 Maintenance and care
Slowly slide oil dipstick 1 into the guide
#
tube to the stop, and pull it out again after
about three seconds.
Oil level is correct: oil level is between
R
and 3.
Oil level too low: oil level is at
R
below.
Oil level too high: oil level is above 2.
R
If the oil level is too low, add 1.1 US qt
#
(1 liter) of engine oil.
If the oil level is too high, drain off excess
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engine oil. Consult a qualified specialist
workshop.
Checking the engine oil level using the on-
board computer
Requirements:
The engine has an oil level sensor. If not, the
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engine oil level can be checked only with the
oil dipstick ( page 319).
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The engine has been warmed up.
R
The vehicle is parked on a level surface.
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The engine is running at idle speed.
R
The hood is closed.
R
The engine oil level is determined during driving.
Determining the engine oil level can take up to
2
30 minutes with a normal driving style and even
longer with an active driving style.
3 or
On-board computer:
Service Engine Oil Level
4 5
One of the following messages will appear on
the multifunction display:
Measuring Engine Oil
R
of the oil level is not yet possible.
Repeat the request after a maximum of
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30 minutes' driving.
Engine Oil Level OK
R
indicating the oil level on the multifunction
display is green and is between "min" and
"max": the oil level is correct.
Engine Oil Level Add 1.0 l
R
for indicating the oil level on the multifunc‐
tion display is orange and is below "min":
Add 1.1 US qt (1 l) of engine oil.
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Reduce Engine Oil Level
R
for indicating the oil level on the multifunc‐
tion display is orange and is above "max":
Drain off any excess engine oil that has been
#
added. To do so, consult a qualified specialist
workshop.
For Engine Oil Level Switch Ignition On
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Switch on the ignition to check the engine oil
#
level.
Level...: measurement Engine Oil Level System
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level sensor is malfunctioning or not connec‐
ted.
Consult a qualified specialist workshop.
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and the bar display for Engine Oil Level System Currently Unavail.
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Close the hood.
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and the bar display
and the bar display
Inoperative: The oil