Display messages
Possible causes/consequences and 0050 0050Solutions
Driving sy stems and driving saf ety sy stems may be malfunctioning
or temp orarily una vailable.
When the causes ha vebeen eliminated, the driving sy stems and
driving saf ety sy stems will be available again.
If th e display message does not disappear: #
Stop in accordance with the tra ffic conditions. #
Clean the windshield.
Traffic Sign Assist Cur-
rently Unavailable See
Operator's Manual *T
raffic Sign Assist is temp orarily una vailable (/ page163). #
Drive on.
When the causes ha vebeen eliminated, the sy stem will be avail‐
able again.
*T he windshield is dirty.
Clean the windshield.
Blind Spot Assist Inoper-
ative *B
lind Spot Assist is malfunctioning (/ page164). #
Visit a qualified specialist workshop.
Blind Spot Assist Trailer
Not Monitored *W
hen you es tablish an electrical connection with the trailer, Blind
Spot Assist will remain available but the area beside the trailer will
not be monitored. The function of Blind Spot Assist may be restric‐
te d as a result (/ page164). #
Press the left-hand Touch Control and ackn owledge the display
message.
Blind Spot Assist Cur-
rently Unavailable See
Operator's Manual *B
lind Spot Assist is temp orarily una vailable (/ page164).
The sy stem limits ha vebeen reached (/ page164). #
Drive on.
When the causes ha vebeen eliminated, the sy stem will be avail‐
able again.
or #
Ifth e display message does not disappear, stop in accordance
with the traf fic conditions and restart the engine. #
If necessar y,clean there ar bumper. If the bumper is very dirty,
th e sensors in the bumper may malfunction.
Active Lane Keeping
Assist Camera View
Restricted See Opera-
tor's Manual *T
he camera view is restricted (/ page 167).
Po ssible causes:
R Dirt on the windshield in the camera's field of vision
R Heavy precipitation or fog
Driving sy stems and driving saf ety sy stems may be malfunctioning
or temp orarily una vailable.
When the causes ha vebeen eliminated, the driving sy stems and
driving saf ety sy stems will be available again.
If th e display message does not disappear: #
Stop in accordance with the tra ffic conditions. #
Clean the windshield. Display messages and
warning and indicator lamps 363
Display messages
Possible causes/consequences and 0050 0050Solutions
Active Lane Keeping
Assist Inoperative *A
ctive Lane Keeping Assist is malfunctioning (/ page167). #
Visit a qualified specialist workshop.
Active Lane Keeping
Assist Currently Unavail-
able See Operator's Man-
ual *A
ctive Lane Keeping Assist is temp orarily una vailable (/ page167).
The ambient conditions are outside the sy stem limits (/ page167). #
Drive on.
When the ambient conditions are within the sy stem limits, the
sy stem will be available again.
If th e display message does not disappear: #
Stop in accordance with the tra ffic conditions. #
Clean the windshield.
Û
ATTENTION ASSIST Inop-
erative *A
TTENTION ASSIST is malfunctioning. #
Visit a qualified specialist workshop.
Û
ATTENTION ASSIST:
Take a Break! *A
TTENTION ASSIST has de tected fatigue or increasing inattenti ve‐
ness on the driver's part (/ page162). #
Ifnecessa ry,ta ke a break. Engine
Displ
aymessages
Possible causes/consequences and 0050 0050Solutions
00D4
Fuel Level Low *T
he fuel supplies ha vereached there ser veleve l. #
Refuel.
009E
Replace Air Filter *
Ve hicles with a diesel engine: The engine airfilter is clogged and
must be replaced. #
Visit a qualified specialist workshop.
00AC *T
hefan mo tor is defective. #
Without a high engine load, continue tothe nearest qualified
specialist workshop. Ensure that the coolant temp erature dis‐
play remains below 248 °F (120 °C).
003A Check Fuel Filter *T
hewaterth at has accumulated in thewate r sepa rato r has reached
th e maximum le vel. #
Drain thewate r sepa rator (/ page 285). 364
Display messa ges and warning and indicator lamps
Display messages
Possible causes/consequences and 0050 0050Solutions
00B3
Engine Oil Level Cannot
Be Measured *T
he electrical connection tothe oil le vel sensor has been inter rup‐
te d or the oil le vel sensor is faulty. #
Visit a qualified specialist workshop.
00B2
Engine Oil Pressure Stop
Switch Off Engine *D
isplay message for cer tain engines only:
The engine oil pressu reistoo lo w.
* NO
TEEngine damage caused bydriving with insuf ficient
engine oil pressure #
Avoid driving with insuf ficient engine oil pressure. #
Stop in a safe location immediately. Do not continue driving. #
Consult a qualified specialist workshop.
00B2
Check Engine Oil Level
(Add 1 Liter) *T
he engine oil le vel has fallen tothe minimum le vel.
* NO
TEEngine damage caused bydriving with insuf ficient
engine oil #
Avoid long journe yswith insuf ficient engine oil. #
Che ckthe engine oil le vel at the next fuel stop.
Re fill engine oil (/ page 281).
Obser vethe no tes on engine oil (/ page 344).
00B2 Engine Oil Reduce Oil
Level *D
isplay message for cer tain engines only:
The engine oil le vel is too high.
* NO
TEEngine damage caused bydriving with excess engine
oil #
Avoid long journe yswith excess engine oil. #
Visit a qualified specialist workshop immediately and ha vethe
engine oil suctioned off.
00B2
Engine Oil Level Low
Stop Vehicle Turn
Engine Off *D
isplay message for cer tain engines only:
The engine oil le vel is too lo w.
* NO
TEEngine damage caused bydriving with insuf ficient
engine oil #
Avoid long journe yswith insuf ficient engine oil. #
Stop in a safe location immediately. Do not continue driving. #
Switch off the engine. #
Check the engine oil le vel.
Ad d engine oil (/ page 281).
Obser vethe no tes on engine oil (/ page 344). Display messages and
warning and indicator lamps 365
Display messages
Possible causes/consequences and 0050 0050Solutions
00B2
Check Engine Oil At
Next Refueling *T
he engine oil le vel has fallen tothe minimum le vel.
* NO
TEEngine damage caused bydriving with insuf ficient
engine oil #
Avoid long journe yswith insuf ficient engine oil. #
Che ckthe engine oil le vel at the next fuel stop.
To p up engine oil (/ page 281).
Obser vethe no tes on engine oil (/ page 344).
003D Stop Vehicle Leave
Engine Running *T
he battery's charge leve l is too lo w. #
Stop in a safe location immediately. Do not continue driving! #
Let the engine run. #
Do not continue driving until the display message goes out.
003D
Stop Vehicle See Opera-
tor's Manual *T
he battery is no longer being charge d and has reached an exces‐
sively low battery charge leve l.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Stop in a safe location immediately. Do not continue driving. #
Switch off the engine. #
Consult a qualified specialist workshop.
003D
12 V Battery See Opera-
tor's Manual *T
he engine is off and the battery charge leve l is too lo w. #
Switch off electrical consumers that are not required. #
Let the engine runfo r a few minutes or drive an extended dis‐
ta nce.
The battery is charge d.
003D
See Operator's Manual *T
he battery is no longer being charge d.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Stop in a safe location immediately and switch off the engine. #
Consult a qualified specialist workshop.
00AC
Coolant Too Hot Stop
Vehicle Turn Engine Off *T
he coolant is too hot. #
Stop immediately in accordance with the traf fic conditions and
switch off the engine. 366
Display messages and warning and indicator lamps
Display messages
Possible causes/consequences and 0050 0050Solutions &
WARNING Danger of bu rns when opening the hood
If yo u open the hood when the engine has overheated or during
a fire inthe engine compartment, you could come into con tact
wi th hot gases or other escaping operating fluids. #
Before opening the hood, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the
hood closed and call thefire service. &
WARNING Risk of scalding from hot coolant
The engine cooling sy stem is pressurized, particularly when the
engine is warm. If you open the cap, you could be scalded byhot
coolant spr aying out. #
Let the engine cool down before opening the cap. #
When opening the cap, wear pr otective glove s and saf ety
gl asses. #
Open the cap slowly torelease pressure. #
Wait until the engine has cooled down. #
Ensure that the air supply tothe engine radiator is not obstruc‐
te d. #
Avoiding high engine loads, continue tothe nearest qualified
specialist workshop. Ensure that the coolant temp erature dis‐
play remains below 248°F (120°C).
00AC Check Coolant Level See
Operator's Manual *T
he coolant le vel is too lo w. &
WARNING Risk of scalding from hot coolant
The engine cooling sy stem is pressurized, particularly when the
engine is warm. If you open the cap, you could be scalded byhot
coolant spr aying out. #
Let the engine cool down before opening the cap. #
When opening the cap, wear pr otective glove s and saf ety
gl asses. #
Open the cap slowly torelease pressure. *
NO
TEEngine damage due toinsuf ficient coolant #
Avoid long journe yswith insuf ficient coolant. #
Top up coolant (/ page 282).
Regeneration Not Possi-
ble *N
otall conditions ha vebeen met forre ge neration of the diesel par‐
ticulate filter . #
Continue driving as normal until all conditions ha vebeen met for
re ge neration of the diesel particulate filter.
The load condition of the diesel particulate filter is over 50% and the
message still appears on the instrument clus ter. Displ
aymessa ges and warning and indicator lamps 367
Display messages
Possible causes/consequences and 0050 0050Solutions #
Consult a qualified specialist workshop. DEF (Diesel Exhaust Fluid)
Display messages
Possible causes/consequences and 0050 0050Solutions
00E2
Refill Additive See Opera-
tor's Manual *
In addition, theye llow 00E2 DEF indicator lamp lights up on the
instrument clus ter and a warning tone sounds.
The DEF supply has fallen below thefirs twa rning thre shold. #
Add at least 2.5 gal (9.5 l) of DEF (/ page137).
The 00E2 DEF indica tor lamp only disappea rswhen theve hicle
is stationar y,at the latest af ter 20 seconds, as soon as you
switch on the ignition or start the engine af terto pping up.
00E2
Refill Additive Starts
until Emerg. Op.: XXX
See Operator's Manual *I
n addition, theye llow DEF indicator lamp lights up and a warning
to ne sounds.
The DEF supply has fallen below there ser vemar k.
Af terth e message appears forth efirs t time, there maining DEF sup‐
ply will last for appro ximately 12 00 miles (1900 km). The engine can
th en only be star ted ano ther 16 times. The number of remaining
engine starts XX(16 to1) is shown in the message everytime the
engine is star ted. #
Add at least 2.5 gal (9.5 l) of DEF (/ page137). The 00E2DEF
indica tor lamp only disappea rswhen theve hicle is stationar y,at
th e latest af ter 20 seconds, as soon as you swit chon the igni‐
tion or start the engine af terto pping up.
00E2
Refill Additive Emer-
gency Op.: XXX mph See
Operator's Manual *
In addition, theye llow DEF indicator lamp 00E2lights up on the
instrument clus ter and a warning tone sounds.
If th eRefill Additive Emergency Op.: XXX mph See Operator's Man-
ual display message is shown, you can only drive theve hicle at a
maximum speed of 5 mph (8 km/h). #
Add at least 2.5 gal (9.5 l) of DEF (/ page137).
The DEF indica tor lamp 00E2only disappea rswhen theve hicle
is stationar y,at the latest af ter 20 seconds, as soon as you
switch on the ignition or start the engine af terre filling.
0099
Additive System Fault
See Operator's Manual *
In addition, theye llow 00B9 Check Engine warning lamp on the
instrument clus ter lights up and a warning tone sounds.
The DEF reducing agent is con taminated, diluted or is not compliant
with ISO 222 41 . #
Have the DEF supply tank cleaned and refilled at a qualified spe‐
cialist workshop as soon as possible.
0099 Additive System Fault
Starts until Emerg. Op.:
XXX See Operator's Man-
ual *
In addition, theye llow 00B9 Check Engine warning lamp on the
instrument clus ter lights up and a warning tone sounds.
The DEF reducing agent is con taminated, diluted or is not compliant
with ISO 222 41 .
The exhaust gas af tertre atment sy stem is defective or an emissions-
re leva nt malfunction has occu rred. This malfunction or defect can
damage theex haust gas af tertre atment sy stem. 368
Display messages and warning and indicator lamps
Display messages
Possible causes/consequences and 0050 0050Solutions
Af terth e message appears forth efirs t time, the engine can only be
st ar ted ano ther 10 times. The number of remaining engine starts XX
(10 to1) is shown in the message everytime the engine is star ted. #
Visit a qualified specialist workshop immediately.
0099 Additive System Fault
Emergency Op.: XXX
mph See Operator's
Manual *
In addition, theye llow 00B9 Check Engine warning lamp on the
instrument clus ter lights up and a warning tone sounds.
Yo u can only drive theve hicle at a maximum speed of 5 mph
(8 km/h). #
Visit a qualified specialist workshop immediately. Ti
res Display messages
Possible causes/consequences and 0050
0050 Solutions
Tire Pressure Monitor
Inoperative No Wheel
Sensors *T
he ins talled wheels do not ha vesuitable tire pressure sensors. The
tire pressure monitor has been switched off. #
Install wheels with suitable tire pressure sensors.
0077
Tire Press. Sen. Missing *T
he tire pressure sensor signal is missing from one or more tires.
No pressure value is displa yedfo rth e tire in question. #
Have thefa ulty tire pressure sensor replaced at a qualified spe‐
cialist workshop.
Tire Press. Monitor Cur-
rently Unavailable *T
here is inter fere nce from a po werful source of radio wav es As a
re sult, no signals from the tire pressure sensors are received. The
tire pressure monitor is temp orarily una vailable. #
Continue driving.
As soon as the cause has been eliminated, the tire pressure
monitor automatically switches on.
0077 Warning Tire Malfunction *T
he pressure in one or more tires suddenly falls. The wheel position
is shown. &
WARNING Risk of an accident from driving wi thaflat tire
Flat tires are dangerous in thefo llowing ways:
R The tires can overheat and cause a fire.
R The driving characteristics, as well as steering and braking,
may be greatly impaired.
Yo u could then lose cont rol of theve hicle. #
Do not drive with a flat tire. #
Obse rveth e no tes on flat tires. In
fo rm ation about flat tires (/ page 294). #
Stop theve hicle in accordance with the tra ffic conditions. #
Check the tires. Display messages and
warning and indicator lamps 369
Display messages
Possible causes/consequences and 0050 0050Solutions
0077
Check Tires *T
he pressure in one or more tires has fallen significantl y.The wheel
position is shown. &
WARNING Risk of an accident due toinsuf ficient tire pres‐
sure
Ti re pressures that are too low pose thefo llowing hazards:
R The tires may bur st, especially as the load and vehicle speed
increase.
R The tires may wearexc essively and/or une venly, which may
greatly impair tire traction.
R The driving characteristics, as well as steering and braking,
may be greatly impaired.
Yo u could then lose cont rol of theve hicle. #
Obser vethere commended tire pressu re. #
Adjust the tire pressure if necessar y. #
Stop in accordance with the tra ffic conditions. #
Check the tire pressure (/ page310) and the tires.
0077
Please Correct Tire Pres-
sure *T
he pressure in at least one tire is too low or the pressures of the
individual tires deviate too much from each other. #
Check the tire pressure, and add air if necessar y. #
When the tire pressure has been set cor rectl y,re-sta rt the tire
pressure monitor (/ page316).
Tire Pressure Mo nitor
Inoperative *T
he tire pressure monitor is malfunctioning. #
Visit a qualified specialist workshop. Key
Display messages
Possible causes/consequences and 0050 0050Solutions
00AF
Don't Forget Your Key *T
his message reminds you not tolea veyour SmartK eyintheve hi‐
cle. #
Take the SmartK eywith you when youget out of theve hicle.
00AF
Place the Key in the
Marked Space See Oper-
ator's Manual *S
martK eydetection is malfunctioning. #
Change the SmartK ey's position in theve hicle. #
Start theve hicle with the SmartK eyinthe mar ked space
(/ page 110). 37 0
Displaymessa ges and warning and indicator lamps