ECU MERCEDES-BENZ METRIS 2018 MY18 Operator’s Manual

You will find information about the maximum
roof load under "Cargo tie-down points and car-
rier systems" (
Ypage 314).
!Make sure that:
Rthe screws of the roof carrier are tightened
to a maximum torque of 7.4 lb-ft(10 Nm) in
the threaded holes provided and
Rthere is a minimum bolt penetration of
4 turns.
Only install roof carriers and rear racks that
have been approved or recommended for
Mercedes-Benz vehicles. This will help avoid
damage to the vehicle.
You can install a roof carrier on the roof and, for
example, a rear-mounted cycle rack on the tail-
gate.
Install the protective caps on the securing
threads after you have removed the roof carrier.
If you have installed a rear rack on the tailgate,
the additional weight reduces the assistance
provided by the gas pressure springs when the
tailgate is opened. You will then need more force
to open the tailgate. At low outside tempera-
tures below freezing you will need to provide
extra support for the tailgate to prevent it from
sinking unintentionally.
Carrier systems251
Transporting loads
Z

Opening the hood
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.
!Make sure that the windshield wipers are
not folded away from the windshield. You
could otherwise damage the windshield wip-
ers or the hood.
Observe the safety notes when you open the
hood.
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 (Ypage 135).
XPull release handle :on the hood.
The hood is released.
XReach into the gap and push lever ;on the
hood catch to the left.
XRaise the hood and hold it in that position.
XPull support strut ?out of retainer =and
guide it up in the direction of the arrow.
XLower the hood in such a way that support
strut ?glides into recess Aand the hood
engages.
Closing the hood
GWARNING
Cloths or other flammable materials left in the
engine compartment can ignite if they come
into contact with the exhaust system or parts
of the engine that heat up. There is a risk of
fire. After carrying out maintenance work,
make sure that no extraneous flammable
material is left in the engine compartment or
on the exhaust system.
!Do not use your hands to push the hood
down. You could damage it otherwise.
Engine compartment253
Maintenance and care
Z

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

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

Check the brake fluid level regularly, e.g. weekly
or when refueling.
Checking the brake fluid level
XStop your veh icleas far away from traff icas
possible on level ground.
XSwitch off the engine.
XSecure the veh icleto prevent itfrom rolling
away.
XOpen the hood (Ypage 253).
XCheck the brake fluid leve l.
The brake fluid level isadequate ifthe level is
between the MIN mark and MAX mark on
brake fluid reservoir :.
XClose the hood.
Washer fluid
GWARNING
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.
GWAR NING
Certain components inthe engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working inthe engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components describe d in the
following.
GWARNING
Windshield washer concentrate could ignite if it comes into contact with hot engine compo-
nents or the exhaust system. There isa risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
!Only use washer fluid that is suitable for
plastic lamp lenses, e.g. MB SummerFit or MB WinterFit. Unsuitable washer fluid could dam-
age the plastic lenses of the headlamps.
Example :washe rfluid reservoir
Add wind shield washer concentrate to the
washer fluid all year round. Observe the infor-
mation regarding washer fluid under "Service
Products and Capacities" (
Ypage 313).
Adding washer fluid
XMix the washer fluid to the appropriate mixing
rat io in a container beforehand.
XOpen the hood (Ypage 253).
XPull cap :on the washer fluid reservoir
upwards at the tab.
XAdd the premixed washer fluid.
XPress cap :onto the filler neck until it
engages audibly.
XClose the hood.
258Engine compartment
Maintenance and care

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.
Do not run the engine for longer than neces-
sary when the vehicle is stationary.
Before carrying out maintenance measures and
repairs, you must read the following documents
relating to maintenance measures and repairs:
Rrelevant sections of the technical documen-
tation such as the Operator's Manual and
workshop information
Rlegal stipulations such as work safety regula-
tions and accident prevention regulations
While working under the vehicle, you must
secure the vehicle on jack stands with sufficient load capacity.
Never use a vehicle jack instead of stands. The
jack is designed only to raise the vehicle for a
short time when changing a wheel. It is not
suited for performing maintenance work under
the vehicle.
Please also refer to the notes about qualified
specialist workshops (
Ypage 31).
The scope and regularity of the inspection and
maintenance work primarily depend on the
often diverse operating conditions. Specialist
knowledge beyond the scope of this Operator's
Manual is required when carrying out testing
and maintenance work. This work should only be
carried out by trained staff.
The vehicle Maintenance Booklet describes the scope and frequency of maintenance work and
contains additional notes on the Limited War-
ranty. You will find information about service
products approved by Mercede s-Benz a
ndcapacities under "Service products and capaci-
ties" (
Ypage 306)
Maintenance services must be carried out in
accordance with the provisions and recommen- dations in the Maintenance Booklet. Not doing
so could void the warranty claim and lead to
refusal of goodwill gestures after the manufac-
turer has submitted a damage report.
Observe the information under "Mercedes-Benz
genuine parts" (
Ypage 33).
Service interval display
General notes
The service interval display informs you of the
next service due date. Information on the type of
service and service intervals can be found in the
Maintenance Booklet.
iThe service interval display does not provide
information about the engine oil level. The
service interval display should therefore not
be confused with the engine oil level display.
For example, the display shows one of the fol-
lowing service messages for a few seconds:
RService A in .. days
RService A Dueor Service A Due
RServ. A Exceed. by .. Days
Then either the remaining time or distance until
the next service due date is displayed. If the
service due date has been exceeded, the
elapsed time or distance traveled after the over-
due service date is shown. The letter in the dis-
play message indicates which service is due. A
stands for a minor service andBfor a major ser-
vice.
A qualified specialist workshop, e.g. an author-
ized Mercedes-Benz Commercial Van Center,
will reset the service interval display after the
service work has been carried out. You can also
obtain further information on maintenance
work, for example.
The prescribed service interval is based on nor- mal vehicle use. Service work will need to be
performed more frequently than prescribed if
the vehicle is operated under more arduous con-
ditions or with higher loads. Such arduous con-
ditions include:
Rregular city driving with frequent intermediate
stops
Rdriving predominantly short distances
Maintenance259
Maintenance and care
Z

RIt is important that you observe the descri-
bed order of the battery terminals when
connecting and disconnecting a battery.
RWhen jump-starting, make sure that the
battery poles with identical polarity are
connected.
RIt is particularly important to observe the
described order when connecting and dis-
connecting the jumper cables.
RNever connect or disconnect the battery
terminals while the engine is running.
GWARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do
not inhale any battery gases. Do not lean over
the battery. Keep children away from batter-
ies. Wash away battery acid immediately with
plenty of clean water and seek medical atten-
tion.
!You should have all work involving the bat-
tery carried out at a qualified specialist work-
shop.
If, in exceptional circumstances, you need to
disconnect the battery yourself, please make
sure that:
RSecure the vehicle to prevent it from rolling
away.
RYou have switched off the engine and
removed the key. Make sure the ignition is
switched off. Check to see that there are no
indicator lamps lighting in the instrument
cluster. Electronic components such as the
alternator may otherwise be damaged.
RAfter the battery has been disconnected,
the parking brake is automatically
engaged. You can then no longer move the
vehicle.
RFor vehicles with automatic transmission,
the transmission is locked in position P
after disconnecting the battery. You can
then no longer move the vehicle.
RYou have first removed the negative termi- nal and then the positive terminal. Never
mix up the terminal clamp disconnection/
connection order and never mix up the ter-
minal clamps. The vehicle's electronics
may otherwise be damaged. The battery and the cover of the positive ter-
minal clamp must be installed securely during
operation.
Seat base (example: right-hand front seat)
The following description on disconnecting and
removing the battery is based upon the example
of the starter battery in the seat base of the
driver's seat. The additional battery is discon-
nected and removed in the same way as the
starter battery. The auxiliary battery is located in the seat base of the left-hand front seat.
XSwitch off all electrical consumers.
XSwitch off the engine and remove the key
from the ignition lock.
XOpen the front door on the right-hand side.
iTo disconnect or remove the additional bat-
tery, open the left-hand front door. The auxil-
iary battery is located in the seat base of the
left-hand front seat.
XPress both latching springs :down and
remove cover ;upwards from the seat base.
XRemove cover ;by pulling upwards at an
angle from the seat base.
Open seat base (example: right-hand front seat)
XRemove screws Afrom holder B.
XRemove holder B.
262Battery
Maintenance and care

XRemove breather hose? from th eto pof th e
battery.
XPull th ebattery out of th eseat base until th e
negative clam pcan be release dand removed.
XDisconnect th enegative clam pfrom negative
termina l=.
XRemove th enegative clam pin suc h away that
th ebattery cable termina lno longer touches
negative termina l=.
Example: starter battery
XRemove th ebattery from th eseat base and
plac eit on th edoor sill panel as shown. If
necessary, hold th ebattery by handles E.
XRemove thepositive clam pcover from posi-
tive termina lC.
XLoosen positive clam pD on positive termina l
C.
XRemove positive clam pD in suc h away that
th ebattery cable termina lno longer touches
positive termina lC.
XLif tth ebattery from th edoor sill panel by
handles E.
Reconnecting and installing
GWARNIN G
During th echarging process, abattery produ-
ce shydrogen gas. If ashort circuit occur sor
sparks are created, th ehydrogen gas can
ignite. There is aris kof an explosion .
RMakesur ethat th epositive termina lof a
connecte dbattery does no tcome int ocon-
tac twit hvehicl eparts.
RNever plac emetal objects or tools on abat -
tery.
RIt is important that you observ eth edescri-
bed order of th ebattery terminals when
connecting and disconnecting abattery.
RWhen jump-starting ,mak esur ethat th e
battery pole swit hidentical polarit yare
connected.
RIt is particularly important to observ eth e
describe dorder when connecting and dis-
connecting th ejumper cables.
RNever connec tor disconnect th ebattery
terminals while th eengin eis running.
!Always connec tth ebattery in th eorder
describe dbelow. Never mix up th etermina l
clam pdisconnection/connection order and
never mix up th etermina lclamps. You may
otherwise damag eth evehicl eelectronics .
Always observ eth eprescribe dpositive ter-
minal installation position when doin gso.
Otherwise, th epositive clam pmay come int o
contact wit hvehicl eparts. In this cas ethere is
a ris kthat th evehicl emay short-circuit and
catch fire.
The followin gdescription on connecting and
installin gth ebattery is base dupon th eexampl e
of th estarter battery in th eseat base of th e
right-hand fron tseat .The additional battery is
connecte dand installed in th esam eway as th e
starter battery. The auxil
iary battery is locate
din
th eseat base of th eleft-han dfron tseat .
Example: starter battery
XPlaceth ebattery on th edoor sill panel as
shown and secure wit hhandles =if neces-
sary.
XConnect positive clam p; to positive termi-
nal :. Always observ eth epositive termina l
installation position shown when doin gso.
The positive lead mus tbe routed parallel to
Battery263
Maintenance and care
Z

the side of the battery housing in the connec-
tion area.
XPlace the positive clamp cover on positive
terminal:.
XFold both handles =down onto the battery.
XPush the battery into the seat base until the
negative terminal can be connected.
XConnect the negative clamp to negative ter-
minal ?.
XPush the battery into the seat base as far as it
will go.
Open seat base with installed battery (example:
right-hand front seat)
XPush breather hose Aonto the battery con-
nection at the top.
XGuide holder Cover the lower side of the
battery housing and the threads for screws
B.
XScrew on holder Cwith screws B.
The battery is secured to prevent slipping.
Seat base (example: right-hand front seat)
XInsert cover Edown in front of the battery
compartment into the seat base and close it.
Latching springs Dof cover Eshould
engage audibly. Carry out the following work after connecting
the battery:
XReset the side window (Ypage 83).
XReset the electric sliding doors (Ypage 78).
Charging
GWARNING
A discharged battery can freeze at tempera-
tures below freezing point. When jump-start-
ing the vehicle or charging the battery, gases can escape from the battery. There is a risk of
an explosion.
Allow the frozen battery to thaw out before
charging it or jump-starting.
If the indicator/warning lamps do not light up in the instrument cluster when temperatures are
low, it is probably because the discharged bat-
tery has frozen. Should this be the case, do not
jump-start the vehicle or charge the battery. The
service life of a thawed battery may be shorter. Start-up behavior may deteriorate, in particular
at low temperatures. Have the thawed battery
checked at a qualified specialist workshop.
GWARNING
During charging and jump-starting, explosive
gases can escape from the battery. There is a risk of an explosion.
Particularly avoid fire, open flames, creating
sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting.
Do not lean over a battery.
GWARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do
not inhale any battery gases. Do not lean over
the battery. Keep children away from batter-
ies. Wash away battery acid immediately with
plenty of clean water and seek medical atten-
tion.
!Only charge the installed battery with a bat-
tery charger that has been tested and
approved by Mercedes-Benz. This device
allows the battery to be charged when it is
264Battery
Maintenance and care

installed in the vehicle. The vehicle's elec-
tronics system may otherwise be damaged.
!Only charge the battery using the jump-
starting connection point.
A battery charger unit specially adapted for
Mercedes-Benz vehicles and tested and
approved by Mercedes-Benz is available as an
accessory. Only this device permits the charging
of the battery in its installed position. Contact an
authorized Mercedes-Benz Commercial Van
Center for information and availability. Read the
operating instructions for your charger before
charging the battery.
Recharge the battery more frequently if you use the vehicle mainly for short trips and/or drive at
low outside temperatures.
Only charge the installed battery with a battery
charger that has been tested and approved by
Mercedes-Benz, using the jump-start connec-
tion point in the engine compartment.
XConnect the battery charger to the positive
terminal and ground terminal in the same
order as when connecting the donor battery in
the jump-starting procedure (
Ypage 274).
iIf a battery is not installed and not in service,
you should charge it every three months. This
will counter self-discharging and prevent bat-
tery damage.
Care
!
Dirty battery clamps and battery surfaces
cause leak currents which lead to the batter-
ies discharging.
!Do not use cleaning agents containing fuel.
Cleaning agents containing fuel corrode the
battery housing.
!If dirt gets into the battery cell, battery self-
discharge will increase and the battery may
be damaged.
The following points on battery care must be
observed:
XRegularly check the battery terminals and the
fastening of the negative cable to the chassis
to ensure that they are firmly seated.
XAlways keep the battery terminals and battery
surfaces clean and dry.
XLightly grease the undersides of the battery
terminals with acid-resistant grease.
XOnly clean the battery casing with a commer-
cially available cleaning product.
Care
Notes on care
GWARNING
If you use openings in the bodywork or
detachable parts as steps, you could:
Rslip and/or fall
Rdamage the vehicle and cause yourself to
fall.
There is a risk of injury.
Always use secure climbing aids, e.g. a suita-
ble ladder.
!Do not use the lower sliding door guide (car-
riage) as a step. Otherwise, you could damage
the paneling and/or the sliding door mecha-
nism.
!For cleaning your vehicle, do not use any of
the following:
Rdry, rough or hard cloths
Rabrasive cleaning agents
Rsolvents
Rcleaning agents containing solvents
Do not scrub.
Do not touch the surfaces or protective films
with hard objects, e.g. a ring or ice scraper.
You could otherwise scratch or damage the
surfaces and protective film.
!Do not park your vehicle for a long period of
time directly after cleaning, particularly after
cleaning the wheel rim with wheel cleaner.
Wheel cleaner can lead to the increased cor-
rosion of the brake discs and pads. Therefore,
drive for a few minutes after cleaning. By
heating up the brakes, the brake discs and
pads dry. The vehicle can then be parked for a
long period of time.
HEnvironmental note
Only clean your vehicle at specially designed
wash bays. Dispose of empty containers and
Care265
Maintenance and care
Z