X
Hold support strut ? and lift the bonnet
slightly.
X
Guide support strut ? towards retainer =
and apply slight pressure to make it engage.
X
Lower the bonnet and allow it to fall with
momentum from a height of approximately
30 cm.
The bonnet locks audibly.
X
Check that the bonnet is correctly locked.
If the bonnet can be raised slightly, it is not
properly engaged. If the bonnet is not cor-
rectly engaged, open the bonnet again. Let
the bonnet fall with a little more momentum.
Overview of the engine compartment
Example: engine compartment
:
Engine oil filler neck cap (Y page 325)
;
Brake fluid reservoir cap (Y page 330)
=
Coolant expansion tank cap (Y page 329)
?
Washer fluid reservoir cap (Y page 331)
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 approved engine
oils and oil consumption under "Service Prod-
ucts and Capacities" (Y page 383).
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 electronically
(vehicles without steering wheel but-
tons)
Only vehicles with an engine output of 100 kW or
more (models 114 CDI / BlueTEC to 119 Blue-
TEC) can check the oil level electronically via the
on-board computer.
If at extremely low temperatures no engine oil
level is displayed after five minutes, repeat the
engine oil level check after another five minutes.
If an oil level reading is still not displayed, check
the engine oil level with the dipstick
(Y page 327). Have the engine oil level checked
at a qualified specialist workshop.
To check the level, the ignition must be turned
on and the engine must be shut off once it rea-
ches operating temperature. The vehicle must
be parked on a level surface. Use the buttons in
the instrument cluster.
X
Park the vehicle on a level surface.
X
Switch off the engine.
X
Wait for five minutes.
X
Turn the key to position 2 in the ignition lock.
X
Press È to select the Oil measurement
menu.
X
Press 3 to confirm.
The Engine oil level Measuring now
display message appears in the display while
the engine oil level measurement is in pro-
gress.
The display may show the following messages
after the engine oil level measurement.
Display message
Engine oil level OK
X
Action: do not top up oil.
Display message
Add X.X l engine oil
X
Top up with the amount of oil X.X l shown
(Y page 328).
X
Action: check the engine oil level again
after a few minutes.
Engine compartment
325
Maintenance and care
Z
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