2018 MERCEDES-BENZ METRIS engine coolant

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 variations are possi-
ble. Note that your vehicle may not be equipped
with all of the described functions. This also
applies to systems and functions relevant to
safety.
Read the information on qualified specialist
workshops (
Ypage 31).
Engine compartment
Hood
Important safety notes
GWARNING
If the hood is unlatched, it may open up when the vehicle is in motion and block your view.
There is a risk of an accident.
Never unlatch the hood while driving. Before
every trip, ensure that the hood is locked.
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There is a risk of injury.
If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
GWARNING
The ignition system operates with a high volt- age. If you touch the live components, you
could receive an electric shock. There is an
increased risk of injury.
Never touch components of the ignition sys-
tem if:
Rthe engine is running 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 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, let the engine cool down and touch only the components described in the
following.
If you have to carry out work in the engine com-
partment, only touch the following components:
Rhood
Roil dipstick
Rengine oil filler neck cap
Rwasher fluid reservoir cap
Rcoolant expansion tank cap
252Engine compartment
Maintenance and care

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 a height of approximately
1 ft (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 a little more momentum.
Overview of the engine compartment
Engine compartment (example)
:
Engine oil filler neck cap (Ypage 254)
;Brake fluid reservoir cap (Ypage 257)
=Coolant expansion tank cap (Ypage 255)
?Washer fluid reservoir cap (Ypage 258)
Regularly check the fluid level and the assembly
for leaks. If you detect fluid loss, e.g. oil stains
on the vehicle parking space, consult a qualified
specialist workshop immediately.
Engine oil
General notes
!Engine oil 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 309). 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 a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
Certain components in the 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, let the engine cool down and touch only the components described in the
following.
Oil dipstick and engine oil filler neck
Only check the oil level when the engine is at
normal operating temperature.
XStop your vehicle as far away from traffic as
possible on level ground.
XSecure the vehicle to prevent it from rolling
away.
XSwitch off the engine.
XWait for five minutes.
254Engine compartment
Maintenance and care

XOpen the hood (Ypage 253).
XPull out oil dipstick:.
XWipe oil dipstick:using a lint-free cloth.
XInsert oil dipstick :back into the guide tube
as far as it will go and remove it again.
If the level is between MIN mark =and MAX
mark ;, the oil level is adequate.
XIf the oil level has dropped to or below mini-
mum mark =, open cap ?and add engine oil
(
Ypage 255).
The difference in quantity between marks ;
and =is approximately 2 US quarts (2 liters).
XClose the hood.
Add engine oil
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
Certain components in the 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, let the engine cool down and touch only the components described in the
following.
GWARNING
If engine oil comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Make sure that engine oil is not spilled next to
the filler neck. Let the engine cool down and
thoroughly clean the engine oil off the com-
ponents before starting the engine.
HEnvironmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful to
the environment.
!Do not add too much oil. adding too much
engine oil can result in damage to the engine
or to the catalytic converter. Have excess
engine oil siphoned off.
!Do not use any additives in the engine oil.
This could damage the engine.
Engine oil filler neck (example)
Observe the information regarding approved
motor oil under "Service products and capaci-
ties" (
Ypage 309).
XOpen the hood (Ypage 253).
XUnscrew and remove cap :.
XAdd engine oil.
XReplace cap:on the filler neck and tighten.
When doing so, make sure that the cap
engages correctly.
XCheck the oil level with the oil dipstick
(Ypage 254).
XClose the hood.
Coolant
GWARNING
Service products may be poisonous and haz-
ardous to health. There is a risk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labels
of the respective original containers. Always
store service products sealed in their original
Engine compartment255
Maintenance and care
Z

containers. Always keep service products outof the reach of children.
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
Certain components in the 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, let the engine cool down and touch only the components described in the
following.
Coolant contains glycol and is therefore poison-
ous. Also observe the safety notes under "Ser-
vice products and capacities" (
Ypage 306).
GWARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
Only check the coolant level and/or fill the cool-
ant if the vehicle is on a level surface and the
engine has cooled down. The coolant tempera-
ture must be below 122 ‡ (50 †).
!Check the engine cooling and heating sys-
tem regularly for leaks.
If a large quantity of coolant is lost, have the
cause traced and rectified at a qualified spe-
cialist workshop.
GWARNING
If antifreeze comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly clean the
antifreeze from components before starting
the engine.
!Take care not to spill any coolant on painted
surfaces. You could otherwise damage the
paintwork.
Example: cap and coolant expansion tankChecking the coolant level
XStop your vehicle as far away from traffic as
possible on level ground.
XSwitch off the engine.
XSecure the vehicle to prevent it from rolling
away.
XOpen the hood (Ypage 253).
XAllow the engine to cool down.
XUnscrew cap :slowly about half a turn coun-
ter-clockwise and 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 a sufficient
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 a sufficient amount of
coolant in coolant expansion tank ;.
256Engine compartment
Maintenance and care

Adding coolant
XIfthe coolant drops under marker bar=in
the filler neck, add coolant.
Observe the information on the correct cool-
ant mixture rat ioand the required water qual-
ity under "Service products and capacities"
(
Ypage 311). To prevent damage to the
engine co oling system, use only appr oved
corrosion inh ibitor/antifreeze that co mplies
wit h the Mercedes-Benz Specifications for
Service Products.
XReplac e cap:and tighten ina clock wise
dire ction.
XStart the engine.
XSet the temperature inthe veh icleinterior to
the maximum output on the air-conditioning
system control panel.
XAfter approximate lyfive minutes, switch off
the engine again and allow itto cool down.
XCheck the coolant level again and add coolant
ifnecessary.
XClose the hood.
Brake fluid
GWAR NING
Service products may be poisonous and haz-
ardous to health. There isa risk of injury.
Comp ly with instructions on the use, storage
and dispo sal of service products on the labels
of the respective original containers. Always
store service products sealed intheir original
containers. Always keep service products out
of the reach of ch ildren.
GWAR NING
Opening the hood when the engine isover-
heated or when there isa fire inthe engine
compartment could expose you to hot gases
or other service products. There isa risk of
injury.
Let an overheated engine cool downbefore
opening the hood. Ifthere isa fire inthe
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
Certain components in the 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, let the engine cool downand
touch only the components describe d in the
foll owin g.
Brake fluid is hazardous to health. Also observe the safety notes under "Service products and
capacities" (
Ypage 306).
GWARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. Ifthe boilin g point of the brake
fluid is too low,vapor pockets may form in the
brake system when the brakes are applied
hard. This would impair braking efficiency.
There is a risk of an accident.
You should have the brake fluid renewed at
the specified intervals.
!If the brake fluid level in the brake fluid res-
ervoir has fallen to the MIN mark or below,
check the brake system immediately for
leaks. Also check the thickness of the brake
linings. Visit a qualified specialist workshop
immediately.
Do not add brake fluid. This does not correct
the malfunction.
!Brake fluid corrodes paint, plastic and rub-
ber. Ifpaint, plastic or rubber has come into
contact with brake fluid, rinse with water
immediately.
Have the brake fluid renewed every two years at a qualified specialist workshop. Observe the
information regarding brake fluid in the "Service
products and capacities" section (
Ypage 311).
Engine compartment257
Maintenance and care
Z

and associated spray produced by the power
washer could cause extensive damage to thevehicle.
!When using high-pressure cleaning equip-
ment, maintain a minimum distance of
approx. 1 ft (30 cm)betwee nthe spra ynozzle
and th evehicl eparts. Do no tuse apowe r
washer wit h around-jet nozzle. You could
damage th evehicl eor engin eparts.
!Kee pth ewater je tmovin gconstantl ywhile
cleaning .This will avoid causin gdamage to
th evehicle.
Do no tpoin tth ewater je tat:
Rdoo rjoints
Rrear vie wcamera
Rair bellows
Rbrak ehoses
Rwhee lbalance weights
Relectrica lcomponent s
Relectricalconnection s
Rseals
Rdrive train ,especially no tat th eintermedi-
ate bearin gof th epropelle rshaf t
Cleaning the engine
!Water mus tno tente rintak eor ventilation
openings. Whe ncleaning wit hhigh pressur e
water or steam cleaners ,th espray mus tno t
be aime ddirectl yat electrica lcomponent sor
th eterminals of electrica llines.
Preserve th eengin eafter th eengin ehas been
cleaned. Protect th ebelt drive system from
exposure to th epreservative agent.
Also observ eth einformation under "Powe r
washers " (
Ypage 266).
Cleaning the paintwork
!Do notaffix:
Rstickers
Rfilm s
Rmagneti cplates or similar items
to painte dsurfaces. You could otherwise
damage th epaintwork .
Scratches, corrosiv edeposits, area saffecte dby
corrosio nand damage caused by inadequate
car ecanno talways be completely repaired. In
suc hcases, visit aqualified specialist workshop .
XRemove impurities immediately, wher epos -
sible, whils tavoidin grubbin gto ohard.
XSoak insec tremain swit hinsec tremove rand
rinse off th etreated area safterwards .
XSoak birddroppings wit hwater and rinse off
th etreated area safterwards .
XRemove coolant, brak efluid, tree resin ,oils ,
fuel sand greases by rubbin ggentl ywit h a
cloth soaked in petroleum ether or lighte r
fluid.
XUse tar remove rto remove tar stains.
XUse silicon eremove rto remove wax .
Cleaning the windows
GWARNING
You could become trapped by th ewindshield
wiper sif they start movin gwhile cleaning th e
windshield or wiper blades. There is aris kof
injury.
Always switch off th ewindshield wiper sand
th eignition before cleaning th ewindshield or
wiper blades.
!Do no tfol dth ewindshield wiper saway from
th ewindshield unless th ehoo dis closed .Oth-
erwise, you could damage th ehood.
!Hold th ewiper arm securel ywhen foldin g
back. The windshield could be damaged if th e
wiper arm smack sagainst it suddenly.
!Do no tuse dry cloths, abrasiv eproducts ,
solvents or cleaning agents containin gsol-
vents to clean th einside of th ewindows .Do
no ttouch th einside sof th ewindows wit h
har dobjects ,e.g. an ice scrape ror ring. There
is otherwise aris kof damagin gth ewindows .
!Clean thewater drainag echannels of th e
windshield and th erear window at regular
intervals. Deposit ssuc has leaves, petals and
pollen may under certain circumstances pre -
ven twater from draining away. This can lead
to corrosio ndamage and damage to elec -
tronic components.
XClean th einside and outside of th ewindows
wit h a damp cloth and acleaning agen tthat is
recommended and approve dby Mercedes -
Benz .
Care267
Maintenance and care
Z

Example: vehicle identification plate (US vehicles)
Example: vehicle identification plate (vehicles for
Canada)
;
VIN
=Paint code
iThe data shown on the vehicle identification
plate is sample data. This data differs for
every vehicle and may deviate from what is
shown here. The data valid for your vehicle
can be found on the identification plate of
your vehicle.
Vehicle identification number (VIN)
VIN in the engine compartment
The VIN can be found on the vehicle identifica-
tion plate (Ypage 305).
VIN :is also stamped into the longitudinal
member in the engine compartment next to the
fuse box.
Engine number
The engine number is stamped on the crank-
case. More information may be obtained at any
qualified specialist workshop.
Service products and capacities
Important safety notes
GWARNING
Service products may be poisonous and haz-
ardous to health. There is a risk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labels
of the respective original containers. Always
store service products sealed in their original
containers. Always keep service products out
of the reach of children.
HEnvironmental note
Dispose of service products in an environ-
mentally responsible manner.
When handling, storing and disposing of any
service products, please observe the relevant
regulations.
Service products include the following:
RFuels, e.g. gasoline
RLubricants, e.g. engine oil, transmission oil
RCoolant
RBrake fluid
RWasher fluid
RClimate control system refrigerants
Approved service products comply with the
highest quality standards and are listed in the
Mercedes-Benz Specifications for Service Prod-
ucts. Only use service products approved for the
vehicle. This is an important condition for the
Limited Warranty.
You will recognize the service products
approved by Mercedes-Benz by the following
306Service products and capacities
Technical data

Rear axle
Operating fluid: transmission oil
Product name/numberMaintenanceinterval
Mobilube FE 75W-85
Mobilube FE Plus NG
75W-85
MB Sheet No. 235.7—
More information can be obtained at any quali-
fied specialist workshop.
Brake fluid
GWARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the brake
fluid is too low, vapor pockets may form in the
brake system when the brakes are applied
hard. This would impair braking efficiency.
There is a risk of an accident.
You should have the brake fluid renewed at
the specified intervals.
!Brake fluid corrodes paint, plastic and rub-
ber. If paint, plastic or rubber has come into
contact with brake fluid, rinse with water
immediately.
When handling, storing and disposing of brake
fluid, please observe the relevant regulations
and the important safety notes for service prod-
ucts (
Ypage 306).
Over a period of time, the brake fluid absorbs
moisture from the air. This reduces its boiling
point.
Have the brake fluid replaced at specified inter-
vals by a qualified specialist workshop.
iThere is usually a notice in the engine com-
partment to remind you when the next brake
fluid change is due.
Use only approved brake fluids that comply with the Mercedes-Benz Specifications for Service
Products. Always check for the identification
DOT 4 plus. Information about approved brake fluids can be
obtained:
Ron the Internet at
http://bevo.mercedes-benz.co m.
Coolant
Important safety notes
GWARNING
If antifreeze comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly clean the
antifreeze from components before starting
the engine.
!Take care not to spill any coolant on painted
surfaces. You could otherwise damage the
paintwork.
When handling, storing and disposing of coolant
and antifreeze, please observe the relevant reg-
ulations and the important safety notes for oper-
ating fluids (
Ypage 306).
Coolant additive with corrosion and
antifreeze protection
!Use only approved antifreeze/corrosion
inhibitor that complies with MB Specification for Service Products, Sheet Number 325.
Using other, non-approved antifreeze/corro-
sion inhibitors may cause damage to the cool-
ant system and reduce the engine's service
life.
The coolant is a mixture of water and antifreeze
and corrosion inhibitor. It performs the following
tasks:
RAnti-corrosion protection
RAntifreeze protection
RRaises the boiling point
When the vehicle is first delivered, it is filled with
a coolant mixture that ensures adequate anti-
freeze/corrosion protection. Coolant must
remain in the engine cooling system all year
round to ensure anti-corrosion protection and a
higher boiling point, even in countries with high
outside temperatures.
Service products and capacities311
Technical data
Z