Overview of the engine compartment
Example: engine
:
Coolant expansion tank cap (Y page 222)
;
DEF filler neck cap (Y page 129)
=
Engine oil filler neck cap (Y page 220)
?
Brake fluid expansion tank cap
(
Y page 223)
A
Washer fluid reservoir cap (Y page 224)
Regularly check the fluid level and the assembly
for leaks. If you detect fluid loss, e.g. oil flecks on
the vehicle parking space, consult a qualified
specialist workshop immediately.
Engine oil
General notes
!
Engine oil gets dirty in the course of opera-
tion and its quality and volume are gradually
diminished. Regularly check the oil level, and
top up or have it replaced as needed.
Observe the information on engine oils and oil
consumption in the "Technical data" section
(
Y page 280).
You can check the oil level in the engine:
R
on the display of the on-board computer
R
with the oil dipstick
Checking the oil level shown in the dis-
play
If at extremely low temperatures no engine oil
level is displayed after 5 minutes, repeat the
engine oil level check after another 5 minutes.
If an oil level reading is still not displayed, check
the engine oil level with the dipstick
(
Y page 221). Have the engine oil level checked
at a qualified specialist workshop.
Only check the oil level when the engine is at
normal operating temperature.
X
Park the vehicle on a level surface.
X
Switch off the engine.
X
Wait 5 minutes.
X
Turn the key to position 2 in the ignition lock.
The display is activated.
X
Vehicles without steering wheel buttons:
press the 4 menu button on the instrument
cluster (
Y page 32) repeatedly until the dis-
play shows the 1 symbol.
The --:--
display message appears in the
display while the engine oil level measure-
ment is running.
X
Vehicles with steering wheel buttons:
press the Ë service button on the instrument
cluster (
Y page 32).
The 4 Engine oil level Measuring
in progress display message appears in the
display while the engine oil level measure-
ment is in progress.
Display message for vehicles without steer-
ing-wheel buttons: the display may show the
following messages after the engine oil level
measurement.
1
Action
OK
X
Do not add oil.
– 1.0 qts
X
Add the amount of oil
shown (
Y page 222).
X
Check the engine oil level
again after a few minutes.
– 1.5 qts
– 2.0 qts
HI
The oil level is too high.
X
Have excess oil removed.
Measurement units in the display:
R
qts USA only
R
ltr Canada only
Display message for vehicles with steering-
wheel buttons: the display may show the fol-
lowing messages after the engine oil level meas-
urement.
1
Action
Engine oil
level OK
X
Do not add oil.
220
Engine compartment
Maintenance and care
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