
Display messagesPossible causes/consequences andMSolutions
Highbeam AssistinoperativeHighbeamAssis tis faulty.
XVisit aqualified specialist workshop .
HighbeamAssisttem‐porarily unavaila‐ble
Highbea mAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThe camera' sfunctionalit yis impaire ddue to heav yrain ,snow or
fog .
RThe windshield is dirty in th ecamera' sfield of vision .
XStop thevehicl epayin gattention to roa dand traffic conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 130).
XClean th ewindshield (Ypage 235), particularly in th ecamera' s
field of vision .
If th emalfunction has been rectified, th eHighbeam Assist
available againmessage appears.
Engine
Display messagesPossible causes/consequences and MSolutions
ExhaustFilter :
Drive at hig hengine speed. SeeOper. Manual
The automatic regeneration of th ediesel particl efilter is no tsufficien t
or has malfunctioned.
XDrive at an engin espeed of abov e2000 rpm until th edisplay mes -
sage disappears.
If th edisplay message does no tgo out after approximately
20 minutes, hav eth emalfunction rectifie dimmediately at aquali-
fie dspecialist workshop .
Check DieselExhaustFluid SeeOperator' sManual
The DE Fsupply has dropped belo w1.5US gal (5. 5l).
XAd dDE Fsupply (Ypage 129).
The display message only disappear swhen th evehicl eis stationary,
at th elatest after 20 seconds as soo nas you switch on th eignition
or start th eengin eafter refueling.
å
XX starts remaining
Three short warning tone salso sound.
Afte rth emessage appear sfor th efirst time, th eremaining DE Fsupply
will last for approximately 1200 mile s(1900 km). The engin ecan then
only be started another 16 times .
The number of remaining engin estart sxx
(16to 0)is shown in th e
message every time th eengin eis started.
XAd dat least 1. 5US gal (5.5l)of DEF (Ypage 129).
Display messages187
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
4
Engine oil levelStop, turnengineoff
There is no tenough or no oil in th eengine. There is adanger of engin e
damage.
XStop th evehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth eoil level wit hth eoil dipstick (Ypage 221).
XIf theengin eoil level is correct: hav eth emalfunction rectifie d
immediately at aqualified specialist workshop .
XIf theengin eoil level is to olow: hav eth evehicl etowed to aqualified
specialist workshop .
4
Oil sensor Visitworkshop
There isamalfunction in th eengin eoil level display.
XHav eth evehicl echecke dimmediately at aqualified specialist
workshop .
Driving systems
Display messagesPossible causes/consequences and MSolutions
_ _ _
Cruise control
The activation condition sfor cruise control hav eno tbeen met .
You can only activat ecruise control from speeds of 20 mph
(30 km/h).
Cruise contro l
Visit workshop
Cruisecontrol has been deactivated due to amalfunction .
XHavecruise control checke dat aqualified specialist workshop .
LaneKeep. AssistTemporarilyUnavailable
and th eà indicator lamp lights up yellow.
Lan eKeepin gAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThere are no lan emarking spresent.
RThe camera' sfunctionalit yis impaire ddue to heav yrain ,snow or
fog .
RThe camera canno trecogniz eth eroa dmarkings:
-It is to odark .
-The lan emarking sare wor nor are covered, for example, by dir tor
snow.
RThe windshield is dirty in th ecamera' sfield of vision .
XStop thevehicl epayin gattention to roa dand traffic conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 130).
XClean th ewindshield (Ypage 235), particularly in th ecamera' s
field of vision .
If th eà indicator lamp goe sout ,Lan eKeepin gAssis tis opera-
tional again .
LaneKeep. AssistInoperativeLan eKeepin gAssis tis faulty.
XHav eLan eKeepin gAssis tchecke dat aqualified specialist work-
shop.
190Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
Check tire(s)
O
The pressureof on eor mor etires has dropped significantly. If th etire
pressur emonitor has detecte dth eaffecte dwheel, th ewhee lposition
is also displayed.
XStop th evehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth etires .
XRepair or chang eth ewhee lif necessar y (Ypage 266).
XCheckth etire pressur eand correc tit if necessar y (Ypage 253).
The display message disappear sautomatically after drivin gfor a
few minute swit hth ecorrecte dtire pressure.
Warnin gTir edefect
O
On eor mor etires is losing air rapidly. If th etire pressur emonitor has
detecte dth eaffecte dwheel, th ewhee lposition is also displayed.
XStop th evehicl ewithout making any sudden steering or braking
maneuvers ,payin gattention to th etraffic condition sas you do so.
XRepair or chang eth ewhee l (Ypage 266).
Vehicle
Display messagesPossible causes/consequences and MSolutions
Ð
SteeringAssistanceFailure
The powe rassistanc efor th esteering has malfunctioned. You need to
steer mor eforcefully.
XCarefully continu eto aqualified specialist workshop and hav eth e
steering checke dimmediately.
#
Battery/AlternatorVisit workshop
The battery is no tbein gcharged. Possibl ecauses are adefective
alternato ror atorn poly-V-belt .
XStop thevehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth epoly-V-belt .
XIf thepoly-V-belt is torn :do no tcontinu edriving. Consult aqualified
specialist workshop .
XIf thepoly-V-belt is no tdamaged: hav eth evehicl echecke das soo n
as possibl eby aqualified specialist workshop .
÷
Electrically oper‐atedste p
The electrical step has retracte dor extended only partially or no tat all.
XMak esur ethere is sufficien tfree spac efor th eelectrical step.
XOpe nor close th esliding door again .
XIf theelectrical step still does no textend or retrac tfully, push th e
step in manually (Ypage 67). Beforestepping out ,remind th epas-
senger sthat th estep is missing.
1
Hoo dope n
You are already drivin gat walking pace, eve nthough th ehoo dis no t
closed .
XCloseth ehood.
192Display messages
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
h!:b
The yellow ESP®, ABS
and ASR/BAS indicator
lamps and the red brake
system indicator lamp
are lit while the engine is
running.
EBD is malfunctioning or deactivated due to undervoltage or malfunc-
tion.
The battery may not be being charged.
GWARNING
The rear wheels could lock sooner than expected when you apply the
brakes. The braking distance can increase in emergency braking sit-
uations.
There is an increased risk of skidding and accidents.
XVehicles with steering wheel buttons: also observe the messages in
the display (Ypage 176).
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XDo not drive on.
XConsult a qualified specialist workshop.
b The red brake sys-
tem indicator
lamp is lit while
the engine is run-
ning.There is insufficient brake fluid in the expansion tank.
GWARNING
Braking performance can be impaired.
There is a risk of an accident.
XVehicles with steering wheel buttons: also observe the messages in
the display (Ypage 176).
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XCheck the brake fluid level in the expansion tank (Ypage 223).
XIf the brake fluid is below the MIN mark: do not drive on!
XDo not add brake fluid. This does not solve the problem.
XConsult a qualified specialist workshop.
b When towing a
trailer: the red
brake system
indicator lamp is
lit while the
engine is running.
Additionally, a
warning tone
sounds.GWARNING
The brake force booster in the trailer is faulty.
The driving and braking characteristics of your vehicle could change.
There is a risk of the trailer overbraking and of you losing control over
the truck/trailer combination.
There is a risk of an accident.
XVehicles with steering wheel buttons: also observe the messages in
the display (Ypage 176).
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XDo not drive on.
XConsult a qualified specialist workshop.
Indicator and warning lamps in the instrument cluster195
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
6
The red warning
lamp does not go
out approx-
imately 4 seconds
after the ignition
is switched on, or
it lights up again.The restraint systems have malfunctioned.
GWARNING
If the restraint systems are malfunctioning, individual systems could
be triggered inadvertently or might not be triggered at all in the event
of an accident.
There is an increased risk of injury and accidents.
XDrive on with care.
XVisit a qualified specialist workshop immediately.
# The red battery
indicator lamp is
lit while the
engine is running.The battery is not being charged. Possible causes are a defective
alternator or a torn poly-V-belt.
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XCheck the poly-V-belt.
XIf the poly-V-belt is torn: do not continue driving. Consult the near-
est qualified specialist workshop.
XIf the poly-V-belt is not damaged: have the vehicle checked as soon
as possible by a qualified specialist workshop.
#The red battery
indicator lamp is
lit while the
engine is running.The battery is faulty.
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XDo not continue driving under any circumstances.
XConsult a qualified specialist workshop.
#The yellow brake
pad wear indica-
tor lamp is lit after
the engine is star-
ted or while the
vehicle is in
motion.The brake pads/linings have reached their wear limit.
GWARNING
Braking performance can be impaired.
There is a risk of an accident.
XHave the brake pads/linings replaced as soon as possible at a
qualified specialist workshop.
4 The yellow engine
oil level warning
lamp is lit after
the engine is star-
ted or while the
vehicle is in
motion.The oil level has dropped to the minimum level.
XCheck the engine for oil loss.
XIf oil loss is detected: consult a qualified specialist workshop imme-
diately.
XIf no oil loss is detected: check the oil level and add engine oil
(Ypage 221).
198Indicator and warning lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
;
The yellow Check
Engine indicator
lamp is lit while
the engine is run-
ning.The exhaust gas aftertreatment is malfunctioning or an emission rel-
evant malfunction has occurred. This malfunction or defect can dam-
age 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.
XObserve the messages in the display.
XHave the exhaust gas aftertreatment checked immediately at a
qualified specialist workshop.
In some states it is legally prescribed that after the check engine indi- cator lamp lights up you must contact a qualified specialist workshop
immediately. Observe the legal requirements.
% If you turn the key
to position 2in
the ignition lock,
the yellow pre-
glow indicator
lamp remains lit
for approximately
1 minute. Or the
yellow preglow
indicator lamp
lights up for
approximately
1 minute while
the engine is run-
ning.At extremely low temperatures, the engine may not start.
There is a malfunction in the preglow system.
XHave any malfunction rectified at a qualified specialist workshop.
\ The yellow diesel
particle filter indi-
cator lamp is lit
while the engine
is running.The automatic regeneration of the diesel particle filter is not sufficient
or has malfunctioned.
XDrive at an engine speed above 2000 rpm until the diesel particle
filter indicator lamp goes out.
XIf the diesel particle filter indicator lamp does not go out after
approximately 20 minutes: have the malfunction rectified immedi-
ately at a qualified specialist workshop.
ÈThe yellow air fil-
ter indicator lamp
is lit while the
engine is running.The service limit for the air filter has been reached. The air filter is dirty.
XHave the air filter element replaced as soon as possible at a quali-
fied specialist workshop.
Indicator and warning lamps in the instrument cluster201
On-board computer and displays
Z

Load distribution
General notes
!
Excessive loads on individual points of the
cargo floor or on the load surface impair vehi-
cle handling characteristics and could cause
damage to the floor covering.
The overall center of gravity of the load should
always be as low as possible, centered and
between the axles near the rear axle.
On Cargo Vans and Passenger Vans:
XAlways transport loads in the cargo compart-
ment.
XAlways place the load against the backrests of the rear bench seat.
XMove large and heavy loads as far towards the
front of the vehicle as possible against the
rear bench seat. Stow the load flush with the
rear bench seat.
XAlways additionally secure the load with suit-
able load-securing aids or tie downs.
Observe the following notes:
RDo not stack loads higher than the upper edge
of the backrests.
RTransport loads behind seats that are not
occupied.
RIf the rear bench seat is not occupied, insert
the seat belts crosswise into the buckle of the
opposite seat belt.
Securing loads
Important safety notes
GWARNING
If you attach the tie-down incorrectly when
securing the load, the following may occur in
the event of abrupt changes in direction, brak- ing maneuvers or an accident:
Rthe cargo tie-down rings may become
detached or the tie-down may tear if the
permissible load is exceeded
Rthe load may not be restrained.
This may cause the load to slip, tip over or be
tossed about, striking vehicle occupants.
There is a risk of an accident and injury.
Always tension the tie-downs in the proper
manner and only between the described
cargo tie-down rings. Always use tie-downs
designed specifically for the loads.
GWARNING
You may not transport anyone in the cargo
compartment or on the load surface. Never let more people ride in the vehicle than there are
seat belts available. Make sure everyone rid-
ing in the vehicle is correctly restrained with a
separate seat belt. Never use a seat belt for
more than one person at a time.
!Observe the information on the maximum
loading capacity of the individual cargo tie-
down points.
If you use several cargo tie-down points to
secure a load, you must always take the max-
imum loading capacity of the weakest cargo
tie-down point into account.
If you brake hard, for example, the forces act-
ing could be up to several times the weight
force of the load. Always use multiple cargo
tie-down points in order to distribute the force
absorption. Load the anchorages evenly.
Spread the load evenly between the cargo tie-
down points or tie-down rings.
Please also refer to the notes about qualified
specialist workshops (
Ypage 26).
Always observe the operating instructions or the
notes of the lashing strap manufacturer for the
operation of the lashing strap.
Information about the maximum loading capa-
city of the cargo tie-down points can be found in
the "Technical data" section (
Ypage 285).
As the driver, you are responsible for ensuring
that:
RThe load is secured against slipping, tipping,
rolling or falling off. This applies both in nor-
mal traffic conditions and if the vehicle must
swerve to avoid an obstacle, in the event of
full brake application and on poor road surfa-
ces.
RThe applicable requirements and guidelines
relating to load-securing practices must be
met.
If this is not the case, this may constitute a
punishable offense, depending on local legis-
lation and any ensuing consequences.
214Securing loads
Transporting loads

If the: indicator lamp in the instrument
cluster goes on, drain fuel filter with water sep-
arator =immediately.
iWe recommend that you have this mainte-
nance work carried out at a qualified special- ist workshop.
XPark the vehicle safely and secure it from roll-
ing away.
XSwitch off the auxiliary heating system .
XSwitch off the engine.
XOpen the hood (Ypage 218).
XPlace a suitable receptacle under drain
hose :.
XTurn the key to position 2in the ignition lock.
XOpen drain plug ;immediately until the
water/fuel mixture flows out of drain hose :.
XScrew in drain plug;as soon as approx-
imately 0.2 qt (0.2 l)of the water/fuel mixture
has been collected.
The electrical fuel pump automatically halts
the flow of the water/fuel mixture after
30 seconds.
XAfter draining, turn the key back to position 0
in the ignition lock.
XDispose of the collected water/fuel mixture
in an environmentally responsible manner,
e.g. at a qualified specialist workshop.
XCheck drain plug ;. The drain plug must be
closed.
When the engine is running and drain hose ;
is open, fuel is lost through drain hose :.
XClose the hood (Ypage 219).
If the : indicator lamp does not go out after
draining:
XDrain the fuel filter again.
XIf the : indicator lamp does not go out
after draining for the second time, have the
cause checked immediately at a qualified spe-
cialist workshop.
Vehicle interior
Air filter for the rear-compartment air
conditioning
!
Regularly check the air filters for visible dirt.
Clean or replace a dirty filter mat. The dirt may
otherwise lead to damage to the air-condi-
tioning system.
Filter magazine, located on the roof in the rear
compartment
An increased amount of sand or dust may collect in the air filter of the rear-compartment air con-
ditioning when you drive on dusty or sandy
roads.
XTo remove the filter mat: carefully pry
cover :out of recesses ;and remove.
XRemove the filter mat from the air duct.
XTo clean the filter mat: wash the dirty filter
mat with clear water.
XLeave the filter mat to dry.
iThe filter mat must not be cleaned or dried in
a machine.
XTo install the filter mat: insert the filter mat
into the air duct.
XReplace and engage cover :.
Maintenance
General notes
HEnvironmental note
Observe measures to protect the environ-
ment when working on the vehicle. You must
observe the legal requirements when dispos-
ing of service products, e.g. engine oil. This
also includes all components, e.g. filters,
which have come into contact with service
products. Any qualified specialist workshop
can provide information about this.
Dispose of empty containers, cleaning cloths
and care products in an environmentally
responsible manner. Comply with the instruc-
tions for use of the care products.
Maintenance225
Maintenance and care
Z