Page 219 of 334
Problem Possible causes/consequences and
0004 Solutions
0018
The yellow
engine
diagnostic
indicator lamp is
lit up or flashes
while the engine
is running. The injection control is malfunctioning.
The engine is running in emergency mode.
Engine power output may be reduced.
X
Have the vehicle checked at a qualified specialist workshop as
soon as possible.
In some states it is legally prescribed that after the check engine
indicator lamp lights up you must contact a qualified specialist
workshop immediately. Observe the legal requirements. 0018
The yellow
check engine
indicator lamp is
lit while the
engine is
running. The exhaust gas aftertreatment is malfunctioning or an emission
relevant malfunction has occurred. This malfunction or defect can
damage the exhaust gas aftertreatment.
After the first message and under normal operating conditions,
you can drive on for up to approximately 500 mi (800 km). Then
a warning tone sequence sounds and the engine can only be
started another 16 times.
X
Observe the messages in the display.
X Have the exhaust gas aftertreatment checked immediately at a
qualified specialist workshop.
In some states it is legally prescribed that after the check engine
indicator lamp lights up you must contact a qualified specialist
workshop immediately. Observe the legal requirements. 000D
If you turn the
key to
position 2in the
ignition lock, the
yellow preglow
indicator lamp
remains lit for
approximately
one minute. Or
the yellow
preglow
indicator lamp
lights up for
approximately
one minute while
the engine is
running. At extremely low temperatures, the engine may not start.
There is a malfunction in the preglow system.
X
Have any malfunction rectified at a qualified specialist
workshop. Indicator and warning lamps in the instrument cluster
217On-board computer and displays Z
Page 220 of 334
Problem Possible causes/consequences and
0004 Solutions
0013
The yellow air
filter indicator
lamp is lit while
the engine is
running. The service limit for the air filter has been reached. The air filter
is dirty.
X
Have the air filter element replaced as soon as possible at a
qualified specialist workshop. 000A
The yellow tire
pressure
monitor warning
lamp comes on. G
WARNING
The tire pressure monitor indicates a rapid or severe loss of
pressure in at least one tire.
X Stop the vehicle without making any extreme steering
maneuvers or braking suddenly. Pay attention to the traffic
conditions while doing so.
X Check the tires and correctt he tire pressure. If a tire continues
to lose pressure, it must be replaced. Replace damaged tires
immediately.
The warning light will go out after the flat tire has been rectified
and you have been driving for a few minutes.
X Vehicles with steering wheel buttons: also observe the
messages in the display (Y page 192).000A
US vehicles
only:
The yellow tire
pressure
monitor warning
lamp flashes for
60 seconds and
then remains lit. The tire pressure monitor has malfunctioned.
X
Have the tire pressure monitor and the wheels checked at a
qualified specialist workshop. 000E
The yellow water
separator
indicator lamp is
lit when the
ignition is
switched on. The water that has collected in the water separator of the fuel filter
has reached the maximum level.
X
Drain the water separator (Y page 247).218
Indicator and warning lamps in the instrument clusterOn-board computer and displays
Page 243 of 334
X
Secure the vehicle to prevent it from rolling
away.
X Pull release handle 0005on the hood.
The hood is released. X
Reach into the gap and push grip 0006on the
hood catch upwards. X
Swing the hood upwards unti lsuppor tstrut
0026 engages and the hood is supported.
Closing the hood G
WARNING
If the hood is unlatched, it could tip forward
during rapid deceleratio nofthe vehicle and
hit persons or objects within its path. There is
a risk of an accident and injury.
Therefore, always make sure that the hood is
closed and locked completely before driving
off. If the hood is not locked and you are already
driving at walking pace:
R
the yellow 0004indicator lamp in the
instrumentc luster goes on for vehicles
without steering-wheel buttons.
R the 0004 Hood open display appears for
vehicles with steering-wheel buttons.
! When you press the support strut back,
make sure that you do not press it against
the detent position and cause it to bend.
! Do not use your hands to push the hood
down. You could damage it otherwise.
X Lift the hood slightly.
X Press support strut 0026towards the back.
X Lower the hood and allow it to fall with
momentum fro maheight of approximately
1 ft (30 cm).
The hood locks audibly.
X Check that the hood is correctly locked.
If the hood can be raised slightly, it is not
properly engaged.
i If the hood is not correctly engaged, open
the hood again. Let the hood fall with a little
more momentum. Overview of the engine compartment
0005
Coolant expansion tank cap
(Ypage 244)
0006 Diesel Exhaust Fluid (DEF) filler neck
cap 3
(Y page 143)
0026 Engine oil filler neck cap (Y page 242)
3 Only on Cargo Vans/Passenger Vans. Engine compartment
241Maintenance and care Z
Page 249 of 334
Adding washer fluid
X
Mix the washe rfluid to the appropriate
mixing ratio in a container beforehand.
X Open the hood (Y page 240).
X Pull cap 0005on the washer fluid reservoir
upwards at the tab.
X Add the premixed washer fluid.
X Press cap 0005onto the filler neck until it
engages audibly.
X Close the hood. Fuel system
Draining the fuel filter G
WARNING
Fuel is highly flammable. Improper handing of
fuel creates a risk of fire and explosion.
Avoid fire, open flames ,smoking and creating
sparks under all circumstances. Switch off the
ignitio nand auxiliary heating before carrying
ou tw ork to the fuel system. Always wear
protective gloves. H
Environmental note
Dispose of the water-fuel mixture in an
environmentally responsible manner.
! When the 000Eindicator lamp lights up,
drain the fuel filter with water separator
immediately. Otherwise, the engine may be
damaged. If the
000E indicator lamp in the instrument
cluster goes on, drain the fuel filter with water
separator 0026immediately.
i We recommend that you have this
maintenance work carried out at a qualified
specialist workshop.
X Park the vehicle safely and secure it from
rolling away.
X Switch off the auxiliary heating system .
X Switch off the engine.
X Open the hood (Y page 240).
X Place a suitable receptacle under drain
hose 0005.
X Turn the key to position 2in the ignition
lock.
X Open drain plug 0006immediately until the
water/fuel mixture flows out of drain
hose 0005.
X Screw in drain plug 0006as soon as
approximately 0.2 US qt (0.2 l) of the
water/fuel mixture have been collected.
i The electrical fuel pump halts the flow of
the water/fuel mixture after 30 seconds.
X After draining, turn the key back to
position 0in the ignition lock.
X Dispose of the collected water/fuel
mixture in an environmentally responsible
manner, e.g. at a qualified specialist
workshop.
X Check drain plug 0006.The drain plug must
be closed.
When the engine is running and drain
hose 0006is open, fuel is lost through drain
hose 0005.
X Close the hood.
If the 000E indicator lamp does not go out
after draining:
X Drain the fuel filter again.
X If the 000E indicator lamp does not go out
after draining for the second time, have the
cause checked immediately at a qualified
specialist workshop. Engine compartment
247Maintenance and care Z