2019 MERCEDES-BENZ METRIS key battery

Rfrequent operation in mountainous terrain or
on poor road surfaces
Rleaving the engine idling for long periods on a
frequent basis
In these or similar operating conditions, have
the air filter, engine oil and oil filter, for example,
replaced more frequently. Under more arduous
operating conditions, the tires must be checked more often. Further information can be obtained
at a qualified specialist workshop, e.g. an
authorized Mercedes-Benz Commercial Van
Center.
Hiding service messages
Vehicles without steering wheel buttons
XPress the 3button on the instrument clus-
ter.
Vehicles with steering wheel buttons
XPress the aor% button on the steering
wheel.
Calling up the service due date
Vehicles without steering wheel buttons
The vehicle must be stationary. Use the buttons
in the instrument cluster.
XTurn the SmartKey to position 2in the ignition
lock.
XPress Èto select the service display.
The display shows a possible service mes-
sage.
Vehicles with steering wheel buttons
Using the steering wheel buttons
XTurn the SmartKey to position 2in the ignition
lock.
XPress =or; to select the Servicemenu.
XPress9or: to select the ASSYSTPLUSsubmenu and press ato confirm.
The display shows the service due date.
Battery
Important safety notes
Work on the battery, e.g. removing or installing,
requires specialist knowledge and the use of
special tools. Therefore, always have work on the battery carried out at a qualified specialist
workshop.
GWARNING
Work carried out incorrectly on the battery
can lead, for example, to a short circuit and
thus damage the vehicle electronics. This can
lead to function restrictions applying to
safety-relevant systems, e.g. the lighting sys-
tem, the ABS (anti-lock braking system) or the
ESP
®(Electronic Stability Program). The oper-
ating safety of your vehicle may be restricted.
You could lose control of the vehicle, for
example:
Rwhen braking
Rin the event of abrupt steering maneuvers
and/or when the vehicle's speed is not
adapted to the road conditions
There is a risk of an accident.
In the event of a short circuit or a similar inci-
dent, contact a qualified specialist workshop
immediately. Do not drive any further. You
should have all work involving the battery car- ried out at a qualified specialist workshop.
Further information can be found under "ABS"
(
Ypage 64) and under "ESP®" (Ypage 65).
GWARNING
Electrostatic build-up can lead to the creation of sparks, which could ignite the highly explo-
sive gases of a battery. There is a risk of an
explosion.
Before handling the battery, touch the vehicle
body to remove any existing electrostatic
build-up.
The flammable gas mix is produced when the
battery is charged or when the vehicle is jump-
started.
Always make sure that neither you nor the bat-
tery are electro statically charged. Electrostatic
charging results, for example, from:
Rwearing synthetic clothing
Rfriction between clothing and the seat
Rdragging or pushing the battery across carpet
flooring or any other synthetic materials
Rrubbing the battery with cloths or towels.
260Battery
Maintenance and care

Comply with the foll owing safety precautions
and take protective measures when handlin g
batteries.
Risk of explos ion. Explosive oxyhy-
drogen isproduced when batteries
are bein g charge d.Only charge bat-
teries in well- ventilated areas.
Fire, open flames and smoking are
therefore pro hibited when working
on the battery. Avoid creating
sparks.
Battery acid iscaustic. Avoid con-
tact with the skin, eyes or clothing.
Wear acid-proof protective gloves. If
skin or clothes are splashed with
acid, neutr alize the splashes imme-
diat elywith soapy water or an acid
neutr alizer, and then clean the affec-
ted areas with water. Consult a doc-
tor ifnecessary.
Wear eye protection. When mixing
water and acid, the liquidcan splash
into your eyes. Rinse acid splashes
to the eyes immediately with clean
water and contact a doctor immedi-
ately.
Keep ch ildren at a safe distance.
Childr en are not ableto assess the
dangers posed bybatteries and
acid.
When handlin g batteries, observe
the safety precautions and special
protective measures contained in
th is Operator's Manual.
HEnvironmental note
Batteries contain dangerous
substances. It isagainst the
law to dispose of them with
the household rubbish. They
must becollec ted separate ly
and recycled to protect the
environment.
Dispose of batteries inan
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
co llec tion point for used bat-
teries. Observe the foll
owing notes:
RRecharge the battery more frequently, if you:
-predominantly drive short distances
-predominantly drive at low outside temper-
atures
-leave the vehicle parked for a lengthy
period
In order for the batteries to achieve their max-
imum possible service life, they must always
be sufficiently charge d.
RConsult an authorized Mercedes-Benz Com-
mercial Van Centerifyou wish to leave your
vehicle parked for a long period of time.
RWhen you park the vehicle, remove the key if
you do not require any electrical consumers.
The vehicle will then use very little energy,
thus conserving battery power.
RIf your vehicle requires jump-starting, or if you
wish to provide jump-starting assistance to
another vehicle, only use the jump-starting
connection point in the engine compartment
(
Ypage 274).
RHave the battery removed at a qualified spe-
cialist workshop.
Installation locations
Your vehicle may be equipped with three bat-
teries, depending on the equipment version:
RStarter battery in the seat base of the right-
hand front seat
RAuxiliary battery inthe seat base of the right-
hand front seat
RAdditional battery inthe seat base of the left-
hand front seat
Disconnecting and removing
GWARNING
During the charging process, a battery produ-
ces hydrogen gas. If a short circuit occurs or
sparks are created, the hydrogen gas can
ignite. There is a risk of an explosion.
RMake sure that the positive terminal of a
connected battery does not come into con- tact with vehicle parts.
RNever place metal objects or tools on a bat-
tery.
Battery261
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

!Vehicles with a gasoline engine:avoid
repeated and lengthy starting attempts. Oth-
erwise, the catalytic converter could be dam-
aged by non-combusted fuel.
If the indicator and warning lamps in the instru-
ment cluster do not light up at low tempera-
tures, the discharged battery may have frozen.
In this case you may neither charge the battery
nor jump-start the vehicle. The service life of a
thawed battery may be shorter. Start-up behav-
ior may deteriorate, in particular at low temper-
atures. Have the thawed battery checked at a
qualified specialist workshop.
Do not use a rapid charging device to start the
vehicle. If your vehicle's battery is discharged,
the engine can be jump-started from another
vehicle or from a donor battery using jumper
cables. For this purpose, the vehicle has a jump-
starting connection point in the engine com-
partment.
When jump-starting, observe the following
points:
RThe battery is not accessible in all vehicles. If
the other vehicle's battery is not accessible,
jump-start the vehicle using a donor battery
or a jump-starting device.
RYou may only jump-start the vehicle when the
engine and exhaust system are cold.
Rdo not start the engine if the battery is frozen.
Let the battery thaw first.
Rjump-starting may only be performed from
batteries with a nominal voltage of 12 V.
Ronly use jumper cables that have a sufficient
cross-section and insulated terminal clamps.
Rif the battery is fully discharged, attach the
battery of another vehicle for a few minutes
before attempting to start. This charges the
empty battery a little.
Rmake sure that the two vehicles do not touch.
Make sure that:
Rthe jumper cables are not damaged.
Rbare parts of the terminal clamps do not come into contact with other metal parts while the
jumper cables are connected to the battery.
Rthe jumper cables cannot come into contact
with parts such as the V-belt pulley or the fan.
These parts move when the engine is started
and while it is running.
Jumper cables and further information regarding
jump starting can be obtained at any qualified
specialist workshop.
Before connecting the jumper cables
XApply the parking brake.
XShift the transmission to position P.
XSwitch off all electrical consumers, e.g. audio
equipment, blower.
XTurn the key to position 0in the ignition lock
and remove it.
XOpen the hood (Ypage 253).
Connecting the jumper cable
XPush contact protection cover :of the jump-
starting connection point backwards against
the spring force as far as it will go.
The jump-starting connection point is visible.
Terminal connecting planXRemove the cover from positive terminal =
of the donor vehicle's battery.
XConnect the positive terminal clamp of the
jumper cable to positive terminal =of the
donor vehicle's battery, and then to positive
terminal Aof the jump-starting connection
point.
XRun the donor vehicle's engine at idling
speed.
Jump-starting275
Breakdown assistance
Z

XConnect the negative terminal clamp of the
jumper cable to negative terminal;of the
donor veh icle's battery, and then to earth
contact ?of your own veh icle.
XInsert the key into the ignition lock and start
the engine.
You can now switch electrical consumers
back on except the lighting system.
XBefore disconnecting the jumper cables, let
the engine run for several minutes.
XDisconnect the negative terminal of the
jumper cable from earth contact ?and then
from negative terminal ;of the donor veh i-
cle's battery.
XDisconnect the positive terminal clamp of the
jumper cable from positive terminal Aon the
jump-starting connection point, and then
from positive terminal =of the donor veh i-
cle's battery.
Contact protection cover :isautomatically
returned forwards to its original position by
the spring force and the jump-starting con-
nection pointis closed.
XPosition the cover on positive terminal =of
the donor veh icle's battery.
You can now switch on the lighting system.
XHave the battery checked at a qualified spe-
cialist workshop.
Tow-starting and towing away
Important safety notes
GWAR NING
Functions relevant to safety are restricted or
no longer availab leif:
Rthe engine isnot running.
Rthe brake system or the power steering is
malfunctioning.
Rthere isa malfunction inthe voltage supply
or the veh icle's electrical system.
If your veh icle is bein g towed, much more
force may benecessary to steer or brake.
There isa risk of an acc ident.
In such cases, use a tow bar. Before to wing,
make sure that the steering moves freely.
GWARNING
You can no longer steer the vehicle ifthe
steering wheel lock has been engaged. There
is a risk of an accident.
Alwa ysswit ch off the ignition when to wingthe
vehicle with a tow cable or a tow bar.
GWARNING
When to wingor tow-starting another vehicle
and its weight isgreater than the permissible
gross weight of your vehicle, the:
Rthe to wingeye could detach itself
Rthe vehicle /trailer combination could roll-
over.
There is a risk of an accident.
When towing or tow-starting another vehicle,
its weight should not be greater than the per- missible gross weight of your vehicle.
In formation on the gross vehicle weight can be
found on the vehicle identification plate
(
Ypage 305).
!Secure the tow rope or tow bar to the to wing
eye or trailer tow hitch only. Otherwise, the
vehicle could become damaged.
!Do not use the to wingeye for recovery, this
could damage the vehicle. If indoubt, recover
the vehicle with a crane.
!Drive slowly and smoothly when to wing.
Excessive tractive power could otherwise
damage the vehicles.
!Shift the automatic transmission to Nand
do not open the driver's or front passenger's
door during to wing. The automatic transmis-
sion may otherwise shift to position P,whic h
could damage the transmission.
!The vehicle can be towed a maximum of
30 miles (50km ).The to wingspeed of 30 mph
(50 km/h) must not be exceeded.
If the vehicle has to betowed more than
30 mile
s(50k
m) ,the entire vehicl emust be
raised and transported.
When towing away, you must observe the legal
requirements for the country in which you are
currently driving.
It is better to have the vehicle transported than
to have it towed.
276Tow-starting and towing away
Breakdown assistance

Have the vehicle transported on a transporter or
trailer if it has transmission damage.
The automatic transmission must be in position
iwhen the vehicle is being towed away. If the
automatic transmission cannot be shifted to
position i, have the vehicle transported on a
transporter or trailer.
The battery must be connected and charged.
Otherwise, you:
Rcannot turn the key to position 2in the igni-
tion lock.
Rcannot shift the transmission to position i.
Before the vehicle is towed, switch off the auto-
matic locking feature (
Ypage 74). You could
otherwise lock yourself out of the vehicle when
pushing or towing away the vehicle.
Installing/removing the towing eye
The fixture for the front towing eye is located in the
bumper.
The rear towing eye is located under the bumper.
If you tow or tow-start a vehicle, attach the tow-
ing device to rear towing eye ;.
If your vehicle is equipped with a trailer tow
hitch, attach the towing device to the trailer tow
hitch (
Ypage 165). Installing the front towing eye
XTake the towing eye and screwdriver from the
vehicle tool kit (Ypage 272).
XPress the arrow on the cover
:and remove
cover :from the opening.
You will see the fixture for the towing eye.
XScrew in the towing eye clockwise to the stop.
XInsert the screwdriver into the towing eye and
tighten the towing eye.
XStow the screwdriver in the vehicle tool kit
(Ypage 272).
Removing the front towing eye
XRemove the screwdriver from the vehicle tool
kit (Ypage 272).
XInsert the screwdriver into the towing eye and
turn the screwdriver counter-clockwise.
XUnscrew the towing eye.
XInsert cover :with the lug at the top and
press it in at the bottom until it engages.
XStow the towing eye and the screwdriver with
the vehicle tool kit (Ypage 272).
Towing with the rear axle raised
!
Vehicles with automatic transmission must
not be towed with the rear axle raised. The
vehicle/trailer combination may otherwise
swerve or even roll over.
!The ignition must be switched off if the vehi-
cle is being towed with the front or rear axle
raised. Otherwise, ESP
®may intervene and
damage the brake system.
XSwitch on the hazard warning lamps
(Ypage 98).
XTurn the front wheels to the straight-ahead
position.
XRelease the parking brake.
XIf necessary, turn the key to position 0in the
ignition lock and remove it.
XTake the key with you when leaving the vehi-
cle.
XDo not exceed the towing speed of 30 mph
(50 km/h).
Please observe the important safety instruc-
tions when towing your vehicle with the rear axle
raised (
Ypage 276).
Tow-starting and towing away277
Breakdown assistance
Z