engine coolant MERCEDES-BENZ METRIS 2016 MY16 Operator’s Manual

Engine
Warning/
indicator
lampNSignaltype
Possible causes/consequences and M
Solutions
;NThe yellow CheckE nginew arning lamp lightsupw hile theengine is running.
Therem ay beamalfunction, for example:
Rin th eengine management
Rin th etransmission management
Rin th efuel injection system
Rin th eexhaust system
Rin th eignition system (for vehicle swithagasoline engine)
Rin th efuel system
The emission limit values may be exceeded and th eengine may be runnin gin
emergency mode.
XHav ethe vehicle checked as soon as possible at aqualified specialist workshop.
æNThe yellow reservef uel warning lamp is on while th eengine is running.
The fuel leve lhas dropped to th ereserver ange.
XRefuel at th enearest gas station.
?NThe red coolant warning lamp comes on while th eengine is running.
On vehicle swithout steering wheel buttons, th ecoolant temperatur egage is at the
start of th ebar display (
Ypage 172).
On vehicle swith steering wheel buttons ,the coolant temperatur egage is at the
start of th escale in th einstrumentc luster(
Ypage 37).
The temperatur esensor for th ecoolant temperatur egage is faulty.
The coolant temperatur eisnolonger beingm onitored. Thereisar isk of engine
damag eifthecoolant temperatur eistoohigh.
XStop th evehicle immediately, payinga ttention to road and traffic conditions,
and switch off th eengine .Don otcontinue driving unde rany circumstances.
XSecure th evehicle to prevent it from rolling away (Ypage 132).
XConsult aqualified specialist workshop.
Indicator and warning lamps in th einstrumen tcluster223
On-boardc omputer and displays
Z

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
?NThe red coolant warning lamp comes on while the engine is running.
The coolant leve listoo low.
If the coolant leve liscorrect, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being cooleds ufficiently.
XObserve the display messages.
XStop the vehicleimmediately, paying attention to road and traffic conditions,
and switch off the engine.
XSecure the vehicletop revent it from rolling awa y(Ypage132).
XExit the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant leve land add coolant, observing the warning notes
(Ypag e244).
XIf you have to add coolant more frequently, have the engine cooling system
checked.
XMake sure that the air supply to the radiator is not obstructed ,byfrozen slush
for example.
XCheck the coolant temperature:
Rusing the display in the on-board computer on vehicles without steering wheel
buttons (Ypag e172)
Rusing the analog display in the instrument cluster on vehicles with steering
whee lbuttons (Ypag e37)
XDo not start the engine again until the coolant temperature is below the maxi-
mum valu especified below. The engine coul dotherwise be damaged.
XDrive to the neares tqualified 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 cool-
ant temperature gage may rise to 248 ‡(120 †).
?NThe red coolant warning lamp comes on while the engine is running. An addi-
tional warning tone sounds.
The coolant temperature has exceededt he maximumvaluespecified below. The
airflow to the engine radiator may be blocked or the coolant leve lmay be too low.
GWARNING
The engine is not being cooleda dequately and couldbecome damaged.
Never drive with an overheated engine. Otherwise, fluids which may have leaked
into the engine compartment coul dcatch fire.
In addition, steam from an overheated engine can caus eserious burns, which can
occur just by opening the hood.
There is arisk of injury.
XObserve the display messages.
XStop the vehiclei mmediately, paying attention to road and traffic conditions,
and switch off the engine.
XSecure the vehicletop revent it from rolling awa y(Ypage 132).
224Indicator and warning lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
XExit the vehicleand keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant leve land add coolant, observing the warning notes
(Ypag e244).
XIf you have to add coolant more frequently, have the engine cooling system
checked.
XMake sure that the air supply to the radiator is not obstructed ,byfrozen slush
for example.
XCheck the coolant temperature:
Rusing the display in the on-board computer on vehicles without steering wheel
buttons (Ypag e172)
Rusing the analog display in the instrument cluster on vehicles with steering
whee lbuttons (Ypag e37)
XIf the coolant temperature is below the maximu mvaluespecified below, you can
continue driving to the neares tqualified 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 cool-
ant temperature gage may rise to 248 ‡(120 †).
Driving systems
Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
·NThe red distance warning lamp lights up while the vehicleisinm otion.
The distance to the vehicleinf ront is too smallfor the speeds elected.
XIncrease the distance.
·NThe red distance warning lamp lights up while the vehicleisinm otion. An
additiona lwarning tone sounds.
You are approaching avehicl eoras tationary obstacl einyourline of travel at too
high aspeed.
XBe prepared to brake immediately.
XPay particular attention to the traffic situation. You may have to brake or take
evasive action.
Further information about the distance warning function can be found under
"COLLISION PREVENTION ASSIST" (
Ypag e143).
Indicator and warning lamps in the instrument cluster225
On-board computer and displays
Z

Useful information
This Operator's Manual describes all models as
well as standard and optional equipment of your
vehicle that were available at the time of going
to print.Country-specific variation sare possi-
ble. Note that your vehicle may not be equipped
with all of the described functions. This also
applies to system sand function srelevantt o
safety.
Read the information on qualified specialist
workshops (
Ypage 29).
Engine compartment
Hood
Important safetyn otes
GWARNING
If the hood is unlatched, it may open up when the vehicle is in motion and block your view.
There is arisk of an accident.
Never unlatc hthe hood while driving. Before
every trip, ensure that the hood is locked.
GWARNING
Openin gthe hood when the engin eisover-
heated or when ther eisafire in the engine
compartmen tcould expose you to hot gases
or other servicep roducts. There isarisk of
injury.
Let an overheated engin ecool down before
openin gthe hood. If ther eisafire in the
engin ecompartment, keep the hood closed
and contact the fire department.
GWARNING
The engin ecompartmen tcontains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There is ar isk of injury.
If you need to do any work inside the engine
compartment:
Rswitc hoff the ignition
Rneve rreach int othe area where ther eisa
risk of danger from movingc omponents,
such as the fan rotation area
Rremovej ewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from movingp arts
GWARNING
The ignition system operate swithahigh volt-
age. If you touc hthe live components, you
could receiv eanelectric shock.T here is an
increased risk of injury.
Never touc hcomponents of the ignition sys-
tem if:
Rthe engin eisrunning or being started
Rthe key is in radio position or drive position
in the ignition lock
The live components of the ignition system are,
for example:
Rignition coils
Rspark plug connectors
Rdiagnostic sockets
GWARNING
Certain components in the engin ecompart-
ment ,such as the engine, radiator and parts
of the exhaust system ,can becomev ery hot.
Working in the engin ecompartmen tposes a
risk of injury.
Where possible, let the engin ecool down and
touc honly the components described in the
following.
If you have to carry out work in the engin ecom-
partment ,only touc hthe following components:
RHood
ROil dipstick
REngine oil filler nec kcap
RWasher fluid reservoir cap
RCoolant expansion tan kcap
240Engine compartment
Maintenance and care

or other service products. There isarisk of
injury.
Let an overheated engine cool down before
opening the hood. If there is afire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
Certain components in the engine compart-
ment,s uch as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
!Do not use your hands to push the hood
down. You could damage it otherwise.
XHold support strut ?and lift the hood
slightly.
XGuide support strut ?towards retainer =
and apply slight pressure to make it engage.
XLower the hood and allow it to fall with
momentum from aheight of approximately
1ft( 30 cm).
The hood locks audibly.
XCheck that the hood is correctly locked.
If the hood can be raised slightly, it is not
properly engaged. If the hood is not correctly
engaged, open the hood again. Let the hood
fall with alittle more momentum.
Overview of the engine compartment
Engin ecompartment (example)
:
Engin eoil filler neck cap (Ypage 242)
;Brake fluid reservoir cap (Ypage 245)
=Coolant expansion tank cap (Ypage 244)
?Washer fluid reservoir cap (Ypage 246)
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 aqualified
specialist workshop immediately.
Engine oil
General notes
!Engin eoil 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" (
Ypage 298).
You can check the oil level in the engine:
Rwith the oil dipstick
Checking the oil level using the oil dip-
stick
GWARNING
Opening the hood when the engine is over-
heated or when there is afire in the engine
compartment could expose you to hot gases
or other service products. There is arisk of
injury.
Let an overheated engine cool down before
opening the hood. If there is afire in the
242Engine compartment
Maintenance and care

Engine oilfille rneck (example)
Observ ethe informatio nregarding approved
moto roilunder "Service products and capaci-
ties" (
Ypage 298).
XOpe nthe hoo d(Ypage 241).
XUnscrew and remove cap :.
XAdd engine oil.
XReplace cap:on the fille rneck and tighten.
Whe ndoing so, make sure thatt he cap
engages correctly.
XCheck the oill evel with the oild ipstick
(Ypage 242).
XClose the hood.
Coolant
GWARNING
Service products maybep oisonousand haz-
ardous to health .There is ariskofi njury.
Compl ywithi nstructions on the use, storage
and disposalofs erviceproducts on the labels
of the respective original containers. Always
stor eservic eproducts seale dintheiroriginal
containers. Alway skeeps ervic eproducts out
of the reach of children.
GWARNING
Opening the hoo dwhent he engine is over-
heated or when ther eisafireint he engine
compartment could expose yo utohot gases
or othe rservic eproducts. There is arisko f
injury.
Let an overheate dengine coo ldow nb efore
opening the hood. If ther eisafireint he
engine compartment, kee pthe hoo dclosed
and contact the fir edepart ment.
GWARNING
Certai ncomponents in the engine compart-
ment, such as the engine ,radiator and parts
of the exhaust system ,can become ver yhot.
Working in the engine compartment poses a
ris kofi njury.
Where possible, le tthe engine coo ldow na nd
touch onl ythe components describe dinthe
following.
Coolant contains glyco land is therefore poison-
ous. Als oobserve the safety notes under "Ser-
vic ep roducts and capacities" (
Ypage 295).
GWARNING
The engine cooling system is pressurized, par-
ticularly when the engine is warm. When
opening the cap ,you could be scalded by hot
coolant spraying out. There is ariskofi njury.
Let the engine coo ldow nb efore opening the
cap .Weare ye and hand protection when
opening the cap .Opent he cap slowly half a
tur ntoa llowpressure to escape.
Onlyc heck the coolant level and/or fil lthe cool-
ant if the vehicl eisonalevel surface and the
engine hasc ooleddown. The coolant tempera-
tur em ustbeb elow122‡(50 †).
!Check the engine cooling and heating sys-
tem regularly for leaks.
If al arge quantity of coolant is lost, have the
cause traced and rectifie dataqualified spe-
cialist workshop.
GWARNING
If antifreeze come sinto contact with hot com-
ponents in the engine compartment, it may
ignite .There is ariskoff irea nd injury.
Let the engine coo ldow nb efore yo uadd anti-
freeze .Makes uret hata ntifreeze is not spilled
next to the fille rneck. Thoroughl yclean the
antifreeze from components before starting
the engine.
244Engine compartment
Maintenance and care

!Take care not to spill any coolant on painted
surfaces. You could otherwise damage the
paintwork.
Example: cap and coolant expansion tank
Checkingt he coolant level
XStop your vehicle as far awayf rom traffic as
possible on level ground.
XSwitch off the engine.
XSecure the vehicle to prevent it from rolling
away.
XOpen the hood (Ypage 241).
XSlowly turn cap :half aturn counter-clock-
wise to allow excess pressure to escape.
XTurn cap :further and remove it from cool-
ant expansion tank ;.
XCheck the coolant level.
If the coolant is up to marker bar =in the
filler neck when cold, there is asufficient
amount of coolant in coolant expansion
tank ;.
If the coolant is approximately 0.59 in
(1.5 cm) above marker bar =in the filler neck
when warm, there is asufficient amount of
coolant in coolant expansion tank ;.
Adding coolant
XIf the coolant drops under marker bar =in
the filler neck, add coolant.
Observe the information on the correct cool-
ant mixture ratio and the required water qual-
ity under "Service products and capacities"
(
Ypage 300). To prevent damage to the
engine cooling system, use only approved
corrosion inhibitor/antifreeze that complies
with the Mercedes-Benz Specifications for
Service Products.
XReplace cap :and turn it clockwise to
tighten.
XStart the engine.
XSet the temperature in the vehicle interior to
the maximum output on the air-conditioning
system control panel.
XAfter approximately 5minutes ,switch off the
engine and allow it to cool down.
XCheck the coolant level againa nd add coolant
if necessary.
XClose the hood.
Brake fluid
GWARNING
Service products may be poisonous and haz-
ardous to health. There is arisk of injury.
Comply with instructionsont he use, storage
and disposalofs ervice products on the labels
of the respective original containers. Always
store service products sealed in their original
containers. Alwaysk eep service products out
of the reach of children.
GWARNING
Opening the hood when the engine is over-
heated or when there is afire in the engine
compartment could expose you to hot gases
or other service products. There is arisk of
injury.
Let an overheated engine cool down before
opening the hood. If there is afire in the
engine compartment,k eep the hood closed
and contact the fire department.
GWARNING
Certain componentsint he engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible,l et the engine cool down and
touch only the componentsd escribed in the
following.
Brake fluid is hazardous to health. Also observe the safety notes under "Service products and
capacities" (
Ypage 295).
Engine compartment245
Maintenance and care
Z

Example: vehicleide ntification plate (US vehicles)
Example: vehicl eide ntification plate (vehicle sfor
Canada)
;
VIN
=Paint code
iThe data shown on the vehicl eide ntification
plate is sampl edata. Thi sdatad iffers for
every vehicl eand mayd eviate from what is
shown here. The data vali dfor your vehicle
can be found on the identificatio nplate of
your vehicle.
Vehicl eidentificatio nnumber (VIN)
VIN in the engine compartment
The VIN can be found on the vehicl eide ntifica-
tio np late (Ypage 294).
VIN :is also stampe dinto the longitudinal
membe rinthe engine compartment next to the
fuse box.
Engine number
The engine numbe risstampe donthe crank-
case. Mor einformatio nmaybe obtained at any
qualified specialist workshop.
Service products and capacities
Important safety notes
GWARNING
Service products maybep oisonousand haz-
ardous to health .There is ariskofi njury.
Compl ywithi nstructions on the use, storage
and disposalofs erviceproducts on the labels
of the respective original containers. Always
stor eservic eproducts seale dintheiroriginal
containers. Alway skeeps ervic eproducts out
of the reach of children.
HEnvironmental note
Dispose of servic eproducts in an environ-
mentall yresponsibl emanner.
Whe nhandling ,storing and disposing of any
servic eproducts, please observe the relevant
regulations.
Service products includ ethe following:
Rfuels, e.g .gasoline
Rlubricants ,e.g.e ngine oil, transmission oil
RCoolant
RBrake fluid
RWashe rfluid
RClimate contro lsystem refrigerants
Approve dservic eproducts comply with the
highest quality standards and ar elisted in the
Mercedes-Benz Specifications for Service Prod-
ucts .Onlyu seservic eproducts approved for the
vehicle. Thi sisanimportant condition for the
Limite dWarranty.
Yo uc an identify servic eproducts approved by
Mercedes-Benz by the following inscription on
Servic eproducts and capacities295
Technica ldata
Z

Rear axle
Serviceproduct: transmission oil
Product name/numberMaintenance
interval
Mobilub eFE 75-W-85
Mobilube FE Plus NG
MB Shee tNo. 235.7—
Further information can be obtained at any
qualified specialist workshop.
Brake fluid
GWARNING
The brake fluid constantly absorbsm oisture
from the air. Thi slowers the boiling point of
the brake fluid .Ifthe boiling point of the brake
fluid is too low, vapor pockets may form in the
brake system when the brakes are applied
hard. Thi swould impai rbraking efficiency.
There is ariskofana ccident.
Yo us houl dhavet he brake fluid renewe dat
the specified intervals.
!Brake fluid corrodes paint, plastic and rub-
ber .Ifp aint, plastic or rubber hasc ome into
contact with brake fluid ,rins ew ithw ater
immediately.
Whe nhandling, storing and disposing of brake
fluid ,pleas eobserve the relevant regulations
and the important safety notes for service prod-
ucts (
Ypage 295).
Overap eriodoft ime,the brake fluid absorbs
moistur efrom the air. Thi sreduce sits boiling
point.
Have the brake fluid renewe devery 2years at a
qualified specialist workshop.
iThere is usuall yanotice in the engine com-
partment to remind yo uwhent he next brake
fluid change is due.
Use only approved brake fluid sthat comply with
the Mercedes-Benz Specifications for Service
Products. Alway scheck for the identification
DOT 4plus.
Information abouta pproved brake fluid scan be
obtained:
Rat any qualified specialist workshop
Ron the Interne tat
http://bevo.merced es-benz.com.
Coolant
Important safety notes
GWARNING
If antifreezec omes intocontac twithh ot com-
ponents in th eenginec ompartment, it may
ignite .Thereisar iskoff irea nd injury.
Let th eenginec ooldown before you add anti-
freeze. Makes ure that antifreezeisn otspilled
next to th efille rneck. Thoroughlyc lean the
antifreezef romc omponents before starting
th ee ngine.
!Takec aren otto spill any coolant on painted
surfaces .You coul dotherwise damag ethe
paintwork.
When handling, storin gand disposingofc oolant
and antifreeze, please observ ethe relevan treg-
ulationsa nd theimportant safety note sfor ser-
vic ep roduct s(
Ypage 295).
Coolan tadditive with corrosion and
antifreeze protection
!Use only approved antifreeze/corrosion
inhibitor that complies withMBS pecification
300Service products and capacities
Technical data
for Service Products, Sheet Number 325.
Using other, non-approved antifreeze/corro-
sion inhibitors may causedamage to the cool-
ant system and reduce the engine' sservice
life

.
The coolant is amixture of water and antifreeze
and corrosion inhibitor. It performs the following
tasks:
Rcorrosion protection
Rantifreeze protection
Rraises the boiling point
When the vehicl eisfirst delivered, it is filled with
ac oolant mixture that ensure sadequate anti-
freeze and corrosion protection. Coolant must
remai ninthe engine cooling system all year
round to ensure anti-corrosion protection and a
higher boiling point, even in countries with high
outside temperatures.
To prevent damage to the engine cooling sys-
tem, use only approved antifreeze and corrosion
inhibitor that complies with the Mercedes-Benz Specifications for Service Products.
Mercedes-Benz recommends an antifreeze and
corrosion inhibitor that meets the requirements
in the Mercedes-Benz Specifications for Service
Products Sheet Number 325.
Check the antifreeze/corrosio ninhibitor con-
centration in the coolant every six months.
The percentag eofcorrosion inhibitor/anti-
freeze additive in the engine cooling system
should:
Rbe at least 50%. This way, the engine cooling
system is protected against freezing downt o
approximately -35 ‡(-37 †).
Rnot exceed 55% (antifreeze protection down
to -49 ‡[-45 †]) .Otherwise, hea twilln ot be
dissipated as effectively.
If ther ehasbeen coolant loss, do not refill only
with water. If the vehicl ehaslost coolant, add
equa lparts water and antifreeze/corrosion
inhibitor. The water used as part of the coolant
mixture must fulfil lcertain requirements; these
are usuall yfulfille dbyd rinking water. If the
water quality is not sufficient, yo umusttrea tthe
water.
Mor einformatio ncan be obtaine datany qual i-
fi eds p

ecialist workshop.
Servic eproduct: coolant
Productn ame/number
Zerex G40-91, The Valvoline Company
MB SheetNo. 325.5
Maintenance interval
Hav ethe coolant renewe devery 15 years .
Capacities
Engine coolin gsystem
CoolantApprox. 11 US qt
(10.4l)
Clim ate control systemr efrigerants
Important safety notes
The climate control system of you rvehicle is fil-
led with the refrigerant R ‑134a.
The warning label for the refrigerant being used
can be found on the radiator cross member.
!Only the refrigerant R ‑134a and the PAG oil
approved by Mercedes-Benz may be used.
The approved PAG oil may not be mixed with
any other PAG oil that is not approved for
R-134a refrigerant. Otherwise ,the climate
control system may be damaged.
Maintenance work such as adding refrigerant or
replacing components may only be carried out
by aq ualified specialist workshop. All applicable
regulations thereto and the SAE standard J639
need to be respected.
All work on the climate control system should
always be carried out at qualified specialist
workshop.
Service products and capacities301
Technical data
Z