Overview of the engine compartment
Example: engine
:
Coolant expansion tank cap
(Y page 253)
;
DEF filler neck cap
4
(Y page 148)
=
Engine oil filler neck cap (Y page 250)
?
Brake fluid expansion tank cap
(Y page 254)
A
Washer fluid reservoir cap (Y page 255)
Regularly check the fluid level and the assem-
bly 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 oper-
ation and its quality and volume are gradu-
ally diminished. Regularly check the oil
level, and top up or have it replaced as nee-
ded.
Observe the information on engine oils and oil
consumption in the "Technical data" section
(Y page 322).
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 251). 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 but-
tons: press the 4 menu button on the
instrument cluster (Y page 34) repeatedly
until the display 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 instru-
ment cluster (Y page 34).
The 4 EngineEngine oiloil levellevel MeasuringMeasuring
in progressin progress display message appears in
the display while the engine oil level meas-
urement is in progress.
Display message for vehicles without
steering-wheel buttons: the display may
show the following messages after the engine
oil level measurement.
1
Action
OKOK
X
Do not add oil.
4
For Cargo Van/Passenger Van only
250
Engine compartment
Maintenance and care
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