2019 MERCEDES-BENZ METRIS ECU

Display messagesPossible causes/consequences andMSolutions
Further information on theOccupant Classification Syste m(OCS )can
be found under "Occupant Classification Syste m(OCS)" (Ypage 53).
#
CheckBrakePadWear
The brak epads/linings hav ereached their wear limit.
XVisit aqualified specialist workshop .
$(USAonly)
J(Canada only)
Check Brake Fluid
Level
There is insufficien tbrak efluid in th ebrak efluid reservoir .
GWARNING
Braking performance can be impaired.
There is aris kof an accident.
XStop th evehicl eimmediately, payin gattention to roa dand traffic
conditions. Do no tcontinu edrivin gunder any circumstances.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 135).
XDo no tadd brak efluid. Addin gmor ewill no tremedy th emalfunc -
tion .
XConsult aqualified specialist workshop .
EBD,ABS ,ESP Inop‐erativ e
+
EBDis unavailable due to amalfunction .ABS, BAS, hill start assist and
ES P®as well as it sdrivin gsafet ysystems ,for example, are therefor e
also unavailable .
ATTENTION ASSIST is deactivated and other drivin gsystems could be
automatically deactivated.
GWARNIN G
The brak esystem continues to function normally, but without th e
function slisted above. The wheels could therefor eloc kprematurel yif
you brak ehard, for example.
This causes steerabilit yand braking to be greatl yimpaired. The brak -
ing distanc ecan increas ein emergenc ybraking situations.
If ES P
®is no toperational, ES P®will notstabiliz eth evehicle.
There is an increased ris kof skiddin gand accidents .
XSwitchth eengin eoff ,wait briefl yand start th eengin eagain .
XCheckif th edisplay message has disappeared and ES P®is opera-
tional.
XIf th edisplay message continues to be displayed:
RDrive on wit hcare.
RVisit aqualified specialist workshop immediately.
Display messages (vehicles without steering wheelbu ttons)195
On-board computer and displays
Z

Engine
Display messagesPossible causes/consequences andMSolutions
#An additional warning tone sounds. The battery is not being charged.
Possible causes:
Rfaulty alternator
Rtorn poly-V-belt
Ra malfunction in the electronics
XStop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
!Do not continue driving. The engine could otherwise overheat.
XSecure the vehicle to prevent it from rolling away (Ypage 135).
XConsult a qualified specialist workshop.
?
Stop Vehicle TurnEng. Off
An additional warning tone sounds. The coolant is too hot.
GWARNING
Never drive with an overheated engine. Driving when the engine is
overheated can cause fluids which may have leaked into the engine
compartment to catch fire.
In addition, steam from an overheated engine can cause serious
burns, which can occur just by opening the hood.
There is a risk of injury.
XStop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
XSecure the vehicle to prevent it from rolling away (Ypage 135).
XWait until the engine has cooled down.
XMake sure that the air supply to the radiator is not obstructed, by
frozen slush for example.
XDo not start the engine again until the display message goes out and
the coolant temperature is below the maximum value specified. The
engine could otherwise be damaged.
XPay attention to the coolant temperature gauge (Ypage 175).
XIf the temperature increases again, visit a qualified specialist work-
shop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature gauge may rise to 248 ‡ (120 †).
?The fan motor is faulty.
XCheck the coolant temperature (Ypage 175).
XIf the coolant temperature is below the maximum value specified
below, you can continue driving to the nearest qualified specialist
workshop.
Avoid heavy loads on the engine, e.g. driving in mountainous terrain,
and stop-and-go traffic.
Under normal operating conditions and with the specified coolant
level, the coolant temperature gauge may rise to 248 ‡ (120 †).
200Display messages (vehicles without steering wheel buttons)
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
Check CoolantLevel
+
The coolan tlevel is to olow.
!Avoid making lon gjourneys wit hto olittl ecoolan tin th eengin e
coolin gsystem. The engin ewill otherwise be damaged.
XAd dcoolant, making sur eto observ eth ewarning note s
(Ypage 255).
XHav eth eengin ecoolin gsystem checke dat aqualified specialist
workshop if th ecoolan tneeds to be refilled mor eoften than usual.
4
Check Engine OilLevel
An additional warning tone sounds. The engin eoil level has dropped to
th eminimum level.
XChec kth eoil level at th elatest when next refuelin g (Ypage 254).
XIf necessary, add engineoil (Ypage 255).
XHav eth eengin echecke dat aqualified specialist workshop if you
need to add engin eoil mor eoften than usual.
!Avoid lon gjourneys wit hto olittl eengin eoil. The engin ewill oth-
erwise be damaged.
Manually Check OilLevelReminder to chec kth eoil level.
XChec kth eoil level at th elatest when next refuelin g (Ypage 254).
XIf necessary, add engineoil (Ypage 255).
XTo confir mtheoil check :press and hold 3.
!Avoid longjourneys wit hto olittl eengin eoil. The engin ewill oth-
erwise be damaged.
4
Sto pVehicl eTur nEng.Off
The oil level is to olow. There is aris kof engin edamage.
XStop th evehicl eimmediately, payin gattention to roa dand traffic
conditions, and switch off th eengine.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 135).
XCheckth eoil level (Ypage 254).
XIf necessary, add engin eoil (Ypage 255).
æ
Reserv eFue l
The fuel level has dropped to th ereserv erange.
XRefue lat th eneares tgas station .
ÏThere is ver ylittl efuel in th efuel tank.
XRefue lat th eneares tgas station without fail .
Display messages (vehicles without steering wheelbu ttons)201
On-board computer and displays
Z

Tires
Display messagesPossible causes/consequences andMSolutions
Correct Tire Pres‐sureThe tire pressure is too low in at least one of the tires, or the tire
pressure difference between the wheels is too great.
XCheck the tire pressure at the next opportunity (Ypage 286).
XIf necessary, correct the tire pressure.
XRestart the tire pressure monitor (Ypage 289).
CheckTirePressureSoonAn additional warning tone sounds.
The tire pressure in one or more tires has dropped significantly.
GWARNING
Tire pressure that are too low pose the following hazards:
RThe tires may burst, especially as the load and vehicle speed
increase.
RThe tires may wear excessively and/or unevenly, which may greatly
impair tire traction.
RThe handling as well as steering and braking characteristics may be severely affected.
There is a risk of an accident.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions while doing so.
XSecure the vehicle to prevent it from rolling away (Ypage 135).
XCheck the tires and, if necessary, change the wheel (Ypage 298).
XCheck the tire pressure (Ypage 286).
XIf necessary, correct the tire pressure.
Caution! Tire Mal‐func.
The tire pressure in one or more tires has dropped suddenly.
GWARNING
Driving with a flat tire poses a risk of the following hazards:
RA flat tire affects the ability to steer or brake the vehicle.
RYou could then lose control of the vehicle.
RContinued driving with a flat tire will cause excessive heat build-up
and possibly a fire.
There is a risk of an accident.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions while doing so.
XSecure the vehicle to prevent it from rolling away (Ypage 135).
XCheck the tires and, if necessary, change the wheel (Ypage 298).
Displa y messages (vehicles without steering wheelbu ttons)203
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
TirePress.Monito rCurrently Unavail.Due toasource of radi ointerference, no signals can be received from
th ewhee lsensors. The tire pressur emonitor is temporarily malfunc -
tioning .
The tire pressur emonitor restarts automatically as soo nas th eprob-
lem has been solved.
Tir ePress.Monito rInoperativeThe tire pressur emonitor is malfunctioning and switched off .Either
th einstalled wheels do no thav esuitable tire pressur esensor sor th e
system is malfunctioning ,e.g. because atire pressur esensor is faulty.
XInstall wheels wit hsuitable tire pressur esensors.
The tire pressur emonitor is activated automatically after drivin gfor
a few minutes.
or
XVisit aqualified specialist workshop .
Vehicle
Display messagesPossible causes/consequences and MSolutions
ÒThe tailgateis open .
XCloseth etailgate.
ÑThe rear door is open .
XCloseth erear door(s).
ÓAn additional warning tone sounds. The hoo dis open .
GWARNIN G
The open hoo dmay then bloc kyour vie wwhen th evehicl eis in motion .
There is aris kof an accident.
XStop th evehicl eimmediately, payin gattention to roa dand traffic
conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 135).
XCloseth ehood.
0An additional warning tone sounds while th evehicl eis in motion .The
display shows th eopen door(s).
XClos eall doors.
Ð
Pwr .Steering Mal ‐
funct.+
An additional warning tone sounds. The steering powe rassistanc e
could be malfunctioning .You may need to steer mor eforcefully.
XCarefully continu eto aqualified specialist workshop and hav eth e
steering checke dimmediately.
204Display messages (vehicles without steering wheelbu ttons)
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
FrontPassengerAir‐bag Disabled SeeOperator' sManual
The front-passenger air bag is deactivated during th ejourney eve n
though th efront-passenger seat is occupied by an adult or aperson
wit h a statur ecorrespondin gto that of an adult .
If additional force sare applie dto th eseat or th eoccupant is no tsitting
on th eseat properly (
Ypage 53), theweigh tth esystem detects may
be to olow.
GWARNIN G
The front-passenger fron tair bag will no tdeploy in th eevent of an
accident.
There is an increased ris kof injury.
XStop th evehicl eimmediately, payin gattention to roa dand traffic
conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 135).
XSwitchoff th eignition .
XThe fron tpassenger mus tget out of th evehicle.
XMak esur ethat th efront-passenger seat is unoccupied ,close th e
front-passenger door and switch on th eignition .
XObserveth ePASSENGER AIRBA GOF Findicator lamp in th ecenter
console and th edisplay message sand chec kth efollowing:
Seat unoccupied and ignition switched on :
RThe PASSENGER AIRBAGOF Findicator lamp mus tligh tup contin-
uously. If th eindicator lamp is on ,th eOccupant Classification Sys -
te m (OCS )has disabled th efro
nt-passenger air bag
(Ypage 53).
RThe display mus tno tsho wthemessage sFrontPassengerAir ‐bag Enable dSee Operator' sManualor Front PassengerAirbag Disabled See Operator' sManual.
XWait for at least on eminute until th enecessar ysystem checks hav e
been completed.
XEnsur ethat th edisplay does no tsho weither of th etwo display
message sabout th efront-passenger fron tair bag.
If these condition sare met ,th efront-passenger seat can be occupied
again .
If these condition sare no tmet ,th eOccupant Classification Syste m
(OCS )is malfunctioning .
XVisitaqualified specialist workshop immediately.
Further information on th eOccupant Classification Syste m(OCS )can
be found under "Occupant Classification Syste m(OCS)" (
Ypage 53).
Display messages (vehicles withsteering whee lbu ttons)207
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
FrontPassengerAir‐bag Enable dSeeOperator' sManual
The front-passenger fron tair bag is enabled during th ejourney eve n
though th efront-passenger seat :
Ris occupied byachild in achild restrain tsystem, or aperson of small
statur e
or
Ris no toccupied.
The system may detec tobjects or force sthat are addin gto th eweigh t
applie dto th eseat .
GWARNIN G
The front-passenger air bag may deploy unintentionally.
There is an increased ris kof injury.
XStop th evehicl eimmediately, payin gattention to roa dand traffic
conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 135).
XSwitchoff th eignition .
XOpenth efront-passenger door .
XRemove thechild and th echild restrain tsystem from th efront-
passenger seat .
XMakesur ethere are no objects applyin gadditional weigh tto th e
seat .
The system may otherwise detec tth eadditional weigh tand inter-
pre tth evehicl eseat occupant's weigh tas greate rthan it actually is.
XMak esur ethat th efront-passenger seat is unoccupied ,close th e
front-passenger door and switch on th eignition .
XObserveth ePASSENGER AIRBA GOF Findicator lamp in th ecenter
console and th edisplay and chec kth efollowing:
Seat unoccu
pied and ignition switched on :
RThe PASSENGER AIRBAGOF Findicator lamp mus tligh tup contin-
uously. If th eindicator lamp is on ,th eOccupant Classification Sys -
te m (OCS )has disabled th efront-passenger air bag (
Ypage 53).
RThe display mus tno tsho wthemessage sFrontPassengerAir ‐bag Enable dSee Operator' sManualor Front PassengerAirbag Disabled See Operator' sManual.
XWait for at least on eminute until th enecessar ysystem checks hav e
been completed.
XEnsur ethat th edisplay does no tsho weither of th etwo display
message sabout th efront-passenger fron tair bag.
If these condition sare met ,th efront-passenger seat can be occupied
again .Observ eth enote son th eOccupant Classification Syste m
(OCS ) (
Ypage 53) .
If these condition sare no tmet ,th eOccupant Classification Syste m
(OCS )is malfunctioning .
XInstall thechild restrain tsystem on asuitable rear seat .
or
XSeat aperson of small statur eon asuitable rear seat .
208Display messages (vehicles withsteering whee lbu ttons)
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
XVisitaqualified specialist workshop immediately.
Further information on th eOccupant Classification Syste m(OCS )can
be found under "Occupant Classification Syste m(OCS)" (
Ypage 53) .
#
CheckBrakePadWear
The brak epads/linings hav ereached their wear limit.
XVisit aqualified specialist workshop .
$(USAonly)
J(Canada only)
Check Brake Fluid
Level
There is insufficien tbrak efluid in th ebrak efluid reservoir .
GWARNING
Braking performance can be impaired.
There is aris kof an accident.
XStop th evehicl eimmediately, payin gattention to roa dand traffic
conditions. Do no tcontinu edrivin gunder any circumstances.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 135).
XDo no tadd brak efluid. Addin gmor ewill no tremedy th emalfunc -
tion .
XConsult aqualified specialist workshop immediately.
T
ò÷
Inoperative SeeOperator' sManual
EB Dis unavailable due to amalfunction .ABS, BAS, hill start assist and
ES P®as well as it sdrivin gsafet ysystems ,for example, are therefor e
also unavailable .
ATTENTION ASSIST is deactivated and other drivin gsystems could be
automatically deactivated.
GWARNIN G
The brak esystem continues to function normally, but without th e
function slisted above. The wheels could therefor eloc kprematurel yif
you brak ehard, for example.
This causes steerabilit yand braking to be greatl yimpaired. The brak -
ing distanc ecan increas ein emergenc ybraking situations.
If ES P
®is no toperational, ES P®will notstabiliz eth evehicle.
There is an increased ris kof skiddin gand accidents .
XDrive on withcare.
XVisit aqualified specialist workshop immediately.
Display messages (vehicles withsteering whee lbu ttons)209
On-board computer and displays
Z