2020 MERCEDES-BENZ METRIS warning light

thawed battery checked at a qualified special-
ist workshop.
G
WARNING
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 suffi-
cient ventilation while charging and jump-
starting. Do not lean over a battery. G
WARNING
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
batteries. Wash away battery acid immedi-
ately with plenty of clean water and seek
medical attention.
! Charge the installed battery only with a
charger approved for Mercedes-Benz. This
device allows the battery to be charged
while it is installed in the vehicle. The vehi-
cle's electronics 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 charg-
ing of the battery in its installed position. Con-
tact 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.
X Connect 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
(Y page
272).
i If a battery is not installed and not in ser-
vice, you should charge it every three
months. This will counter self-discharging
and prevent battery damage. Care
12 V battery !
Dirty battery clamps and battery surfaces
cause leak currents which lead to the bat-
teries discharging.
! Do not use cleaning agents containing
fuel. Cleaning agents containing fuel cor-
rode 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:
X Regularly check the battery terminals and
the fastening of the negative cable to the
chassis to ensure that they are firmly
seated.
X Always keep the battery terminals and bat-
tery surfaces clean and dry.
X Lightly grease the undersides of the battery
terminals with acid-resistant grease.
X Only clean the battery casing with a com-
mercially available cleaning product. Care
Notes on care
G
WARNING
If you use openings in the bodywork or
detachable parts as steps, you could:
R slip and/or fall
R damage the vehicle and cause yourself to
fall.
There is a risk of injury.
Always use secure climbing aids, e.g. a suit-
able ladder. Care
263
Maintenance and care Z

!
Do not use the lower sliding door guide
(carriage) as a step. Otherwise, you could
damage the paneling and/or the sliding
door mechanism.
! When cleaning your car, do not use:
R dry, coarse or hard cloths
R abrasive cleaning agents
R solvents
R cleaning agents containing solvents
Do not scrub.
Do not touch the surfaces and films with
hard objects, e.g. rings or ice scrapers. Oth-
erwise, you may scratch or damage the sur-
faces and films.
! 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 corrosion 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. H
Environmental note
Only clean your vehicle at specially designed
wash bays. Dispose of empty containers and
used cleaning products in an environmen-
tally responsible manner. H
Environmental note
Dispose of empty packaging and cleaning
cloths in an environmentally responsible
manner.
Regular care of your vehicle is a condition for
retaining the quality in the long term.
Use care products and cleaning agents recom-
mended and approved by Mercedes-Benz. Washing the vehicle and cleaning
the paintwork
Automatic car wash G
WARNING
Braking efficiency is reduced after washing
the vehicle. There is a risk of an accident. After the vehicle has been washed, brake
carefully while paying attention to the traffic
conditions until full braking power is
restored.
! Make sure that the automatic car wash is
suitable for the size of the vehicle.
Before washing the vehicle in an automatic
car wash, fold in the exterior mirrors and
remove any additional antennas. Otherwise,
the exterior mirror, antenna or the vehicle
itself could be damaged.
Make sure that the exterior mirrors are fully
folded out again and that any additional
antennas are re-installed when you leave the
automatic car wash.
! Make sure that:
R the side windows and roof are completely
closed
R the climate control blower is switched off
R the windshield wiper switch is in position
0
The vehicle may otherwise be damaged.
You can wash the vehicle in an automatic car
wash from the very start.
Wash off excess dirt before cleaning the vehi-
cle in an automatic car wash.
After putting the vehicle through an automatic
car wash, wipe off wax from:
R the windshield
R the windshield wiper blades
This will prevent smears and reduce wiping
noises caused by residue on the windshield.
R on vehicles with rear-end doors, from the
rear view camera lens in the top of the
license plate molding
(Y page 267)
Washing by hand In some countries, washing by hand is only
allowed at specially equipped washing bays.
Observe the legal requirements of the country
you are currently in when washing by hand.
X Do not use hot water and do not wash the
vehicle in direct sunlight.
X Use a soft car sponge.
X Use a mild cleaning agent, e.g. a Mercedes-
Benz approved car shampoo.264
Care
Maintenance and care

X
Thoroughly hose down the vehicle with a
gentle jet of water.
X Do not point the water jet directly towards
the air inlet grilles.
X Use plenty of water and rinse out the
sponge frequently.
X Rinse the vehicle with clean water and dry
thoroughly with a chamois.
X Do not let the cleaning agents dry on the
paintwork.
When using the vehicle in winter, remove all
traces of road salt deposits carefully and as
soon as possible.
Power washers G
WARNING
The water jet from a circular jet nozzle (dirt
blasters) can cause invisible exterior dam-
age to the tires or chassis components.
Components damaged in this way may fail
unexpectedly. There is a risk of an accident.
Do not use power washers with circular jet
nozzles to clean the vehicle. Have damaged
tires or chassis components replaced imme-
diately.
! Under no circumstances use power wash-
ers in the vehicle interior. The pressurized
water and associated spray produced by the
power washer could cause extensive dam-
age to the vehicle.
! When using high-pressure cleaning equip-
ment, maintain a minimum distance of
approx. 1 ft (30 cm
) between the spray noz-
zle and the vehicle parts. Do not use a
power washer with a round-jet nozzle. You
could damage the vehicle or engine parts.
! Keep the water jet moving constantly
while cleaning. This will avoid causing dam-
age to the vehicle.
Do not point the water jet at:
R door joints
R rear view camera
R air bellows
R brake hoses
R wheel balance weights
R electrical components
R electrical connections R
seals
R drive train, especially not at the inter-
mediate bearing of the propeller shaft
Cleaning the engine !
Water must not enter intake or ventilation
openings. When cleaning with high pressure
water or steam cleaners, the spray must not
be aimed directly at electrical components
or the terminals of electrical lines.
Preserve the engine after the engine has
been cleaned. Protect the belt drive system
from exposure to the preservative agent.
Also observe the information under "Power
washers"

(Y page 265).
Cleaning the paintwork !
Do not affix:
R stickers
R films
R magnetic plates or similar items
to painted surfaces. You could otherwise
damage the paintwork.
Scratches, corrosive deposits, areas affected
by corrosion and damage caused by inade-
quate care cannot always be completely
repaired. In such cases, visit a qualified spe-
cialist workshop.
X Remove impurities immediately, where pos-
sible, whilst avoiding rubbing too hard.
X Soak insect remains with insect remover
and rinse off the treated areas afterwards.
X Soak bird droppings with water and rinse off
the treated areas afterwards.
X Remove coolant, brake fluid, tree resin, oils,
fuels and greases by rubbing gently with a
cloth soaked in petroleum ether or lighter
fluid.
X Use tar remover to remove tar stains.
X Use silicone remover to remove wax.
Cleaning the windows G
WARNING
You could become trapped by the wind-
shield wipers if they start moving while
cleaning the windshield or wiper blades.
There is a risk of injury. Care
265
Maintenance and care
Z

Always switch off the windshield wipers and
the ignition before cleaning the windshield
or wiper blades.
! Do not fold the windshield wipers away
from the windshield unless the hood is
closed. Otherwise, you could damage the
hood.
! Hold the wiper arm securely when folding
back. The windshield could be damaged if
the wiper arm smacks against it suddenly.
! Do not use dry cloths, abrasive products,
solvents or cleaning agents containing sol-
vents to clean the inside of the windows. Do
not touch the insides of the windows with
hard objects, e.g. an ice scraper or ring.
There is otherwise a risk of damaging the
windows.
! Clean the water drainage channels of the
windshield and the rear window at regular
intervals. Deposits such as leaves, petals
and pollen may under certain circumstances
prevent water from draining away. This can
lead to corrosion damage and damage to
electronic components.
X Clean the inside and outside of the windows
with a damp cloth and a cleaning agent that
is recommended and approved by
Mercedes-Benz. Exterior
Cleaning the wheels !
Do not use any acidic or alkaline cleaning
agents. They can cause corrosion on the
wheel bolts or the retainer springs for the
wheel-balancing weights.
! 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 corrosion 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.
If you clean the wheels with a power washer,
observe the safety notes for the power washer (Y page 265). You could otherwise damage
the tires.
Cleaning the wiper blades G
WARNING
You could become trapped by the wind-
shield wipers if they start moving while
cleaning the windshield or wiper blades.
There is a risk of injury.
Always switch off the windshield wipers and
the ignition before cleaning the windshield
or wiper blades.
! Do not fold the windshield wipers away
from the windshield unless the hood is
closed. Otherwise, you could damage the
hood.
! Do not pull the wiper blade. Otherwise, the
wiper blade could be damaged.
! Do not clean wiper blades too often and
do not rub them too hard. Otherwise, the
graphite coating could be damaged. This
could cause wiper noise.
! Hold the wiper arm securely when folding
back. The windshield could be damaged if
the wiper arm smacks against it suddenly.
X Turn the SmartKey to position 0 in the igni-
tion lock or remove the SmartKey.
X Fold the windshield wiper arms away from
the windshield until you feel them engage.
X Carefully clean the wiper blades with a
damp cloth.
X Fold back the wiper arms before switching
on the ignition.
Cleaning the exterior lighting !
Only use cleaning agents or cleaning
cloths that are suitable for plastic lenses.
Caustic, irritant or otherwise unsuitable
cleaning agents or cleaning cloths could
scratch or damage the exterior lighting plas-
tic lenses.
i Inquire about suitable cleaning agents or
cleaning cloths at a specialist workshop.
X Clean the plastic lenses of the exterior light-
ing with a damp sponge and a mild cleaning266
Care
Maintenance and care

Cleaning the steering wheel and selec-
tor lever
X
Thoroughly wipe with a damp cloth.
X Vehicles with leather upholstery: after
cleaning, use leather care agents that have
been recommended and approved by
Mercedes-Benz.
Cleaning the trim elements !
Do not use solvent-based cleaning agents
such as tar remover, wheel cleaners, pol-
ishes or waxes. There is otherwise a risk of
damaging the surface.
X Wipe the trim elements with a damp, lint-
free cloth, e.g. a microfiber cloth.
X Heavy soiling: use care products and
cleaning agents recommended and
approved by Mercedes-Benz.
Cleaning the seat covers !
Do not use microfiber cloths to clean gen-
uine leather or artificial leather covers. If
used often, a microfiber cloth can damage
the cover.
! Clean:
R artificial leather covers with a cloth mois-
tened with a solution containing 1% deter-
gent, e.g. dish washing liquid.
R cloth covers with a microfiber cloth mois-
tened with a solution containing 1% deter-
gent, e.g. dish washing liquid. Wipe entire
seat sections carefully to avoid leaving
visible lines. Leave the seat to dry after-
wards. Cleaning results depend on the
type of dirt and how long it has been
there.
R genuine leather covers carefully with a
damp cloth, then wipe the covers down
with a dry cloth. Make sure that the
leather does not become soaked. Other-
wise, the leather could become rough or
cracked. Only use leather care agents
that have been tested and approved by
Mercedes-Benz. You can obtain these
from a qualified specialist workshop.
i Please keep in mind that:
R leather covers are a natural product and,
as such, are subject to a natural aging process. Leather may react differently,
e.g. increased wrinkling, to certain envi-
ronmental influences (such as high
humidity or intense heat).
R regular care is essential to make sure that
the appearance and comfort of the covers
are retained over time.
To clean genuine leather covers: X Remove any dust, crumbs etc. If necessary,
carefully vacuum-clean the seat covers.
X Carefully wipe the leather seat covers with a
damp cloth.
X Wipe over again with a dry cloth.
Make sure that the leather does not become
soaked, especially perforated parts.
X Then treat the leather seats with a leather
care foam.
Only use leather care agents that have been
tested and approved by Mercedes-Benz.
Observe the manufacturer's instructions.
Cleaning the seat belts G
WARNING
Seat belts can become severely weakened if
bleached or dyed. This could cause the seat
belts to tear or fail, for instance, in the event
of an accident. This poses an increased risk
of injury or fatal injury.
Never bleach or dye the seat belts.
! Do not clean the seat belts using chemical
cleaning agents. Do not dry the seat belts
by heating at temperatures above
176 ‡
(80 †) or in direct sunlight.
Remove any stains or dirt immediately. This
will avoid residue or damage. X Use clean, lukewarm water and soap solu-
tion.
Cleaning the headliner and carpets X
Headliner: if it is very dirty, use a soft brush
or dry shampoo.
X Carpets: use the carpet and textile cleaning
agents recommended and approved by
Mercedes-Benz. Care
269
Maintenance and care Z

G
WARNING
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
batteries. Wash away battery acid immedi-
ately with plenty of clean water and seek
medical attention. G
WARNING
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.
! Vehicles with a gasoline engine:
avoid
repeated and lengthy starting attempts. Oth-
erwise, the catalytic converter could be
damaged by non-combusted fuel.
If the indicator and warning lamps in the
instrument cluster do not light up at low tem-
peratures, 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 behavior may deteriorate, in particular at
low temperatures. 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
compartment.
When jump-starting, observe the following
points:
R The battery is not accessible in all vehicles.
If the other vehicle's battery is not accessi-
ble, jump-start the vehicle using a donor
battery or a jump-starting device.
R You may only jump-start the vehicle when
the engine and exhaust system are cold.
R Do not start the engine if the battery is fro-
zen. Let the battery thaw first. R
Jump-starting may only be performed from
batteries with a nominal voltage of 12 V.
R Only use jumper cables that have a suffi-
cient cross-section and insulated terminal
clamps.
R If 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.
R Make sure that the two vehicles do not
touch.
Make sure that:
R The jumper cables are not damaged.
R Bare parts of the terminal clamps do not
come into contact with other metal parts
while the jumper cables are connected to
the battery.
R The 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 regard-
ing jump starting can be obtained at any quali-
fied specialist workshop. Before connecting the jumper cables
X Apply the parking brake.
X Shift the transmission to position j.
X Switch off all electrical consumers, e.g.
audio equipment, blower.
X Turn the key to position u in the ignition
lock and remove it .
X Open the hood (Y page 251). Connecting the jumper cable Jump-starting
273
Breakdown assistance Z

X
Push 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 visi-
ble. Terminal connecting plan
X Remove the cover from positive terminal =
of the donor vehicle's battery.
X Connect the positive terminal clamp of the
jumper cable to positive terminal = of the
donor vehicle's battery, and then to positive
terminal A of the jump-starting connection
point.
X Run the donor vehicle's engine at idling
speed.
X Connect the negative terminal clamp of the
jumper cable to negative terminal ; of the
donor vehicle's battery, and then to ground
contact ? of your own vehicle.
X Insert the key into the ignition lock and start
the engine.
You can now switch electrical consumers
back on except the lighting system.
X Before disconnecting the jumper cables, let
the engine run for several minutes.
X Disconnect the negative terminal of the
jumper cable from ground contact ? and
then from negative terminal ; of the donor
vehicle's battery.
X Disconnect the positive terminal clamp of
the jumper cable from positive terminal A
on the jump-starting connection point, and
then from positive terminal = of the donor
vehicle's battery.
Contact protection cover : is automatically
returned forwards to its original position by
the spring force and the jump-starting con-
nection point is closed. X
Position the cover on positive terminal = of
the donor vehicle's battery.
You can now switch on the lighting system.
X Have the battery checked at a qualified spe-
cialist workshop. Tow-starting and towing away
Important safety notes
G
WARNING
Functions relevant to safety are restricted or
no longer available if:
R the engine is not running.
R the brake system or the power steering is
malfunctioning.
R there is a malfunction in the voltage sup-
ply or the vehicle's electrical system.
If your vehicle is being towed, much more
force may be necessary to steer or brake.
There is a risk of an accident.
In such cases, use a tow bar. Before towing,
make sure that the steering moves freely. G
WARNING
You can no longer steer the vehicle if the
steering wheel lock has been engaged.
There is a risk of an accident.
Always switch off the ignition when towing
the vehicle with a tow cable or a tow bar. G
WARNING
When towing or tow-starting another vehicle
and its weight is greater than the permissi-
ble gross weight of your vehicle, the:
R the towing eye could detach itself
R the vehicle/trailer combination could roll-
over.
There is a risk of an accident.
When towing or tow-starting another vehi-
cle, its weight should not be greater than
the permissible gross weight of your vehicle.
Information on the gross vehicle weight can be
found on the vehicle identification plate
(Y page
304).274
Tow-starting and towing away
Breakdown assistance

Important notes on tire pressure
G
WARNING
If the tire pressure drops repeatedly, the
wheel, valve or tire may be damaged. Tire
pressure that is too low may result in a tire
blow-out. There is a risk of an accident. R Check the tire for foreign objects.
R Check whether the wheel is losing air or
the valve is leaking.
If you are unable to rectify the damage, con-
tact a qualified specialist workshop.
Use a suitable pressure gauge to check the
tire pressure. The outer appearance of a tire
does not permit any reliable conclusion about
the tire pressure. On vehicles equipped with
the electronic tire pressure monitor, the tire
pressure can be checked using the on-board
computer.
The tire temperature and pressure increase
when the vehicle is in motion. This is depend-
ent on the driving speed and the load.
Therefore, you should only correct tire pres-
sure when the tires are cold.
The tires are cold: R if the vehicle has been parked for at least
three hours without direct sunlight on the
tires, and
R if the vehicle has not been driven further
than
1 mile (1.6 km)
Tire temperature changes depending on the
ambient temperature, driving speed and tire
load. If the tire temperature changes by 18 ‡
(10 †), the tire pressure changes by approx-
imately 10 kPa (0.1 bar/1.5 psi). Take this into
account when checking the pressure of warm
tires. Only correct the tire pressure if it is too
low for the current operating conditions. If you
check the tire pressure when the tires are
warm, it results in a higher value than when
the tires are cold. This is normal. Do not under
any circumstances release the air in order to
adjust the pressure to the prescribed value for
cold tires. The tire pressure would otherwise
be too low.
Observe the recommended tire pressure for
cold tires on the tire pressure table in the fuel
filler flap. Driving with tire pressure that is too high or
too low can:
R shorten the service life of the tires
R cause increased tire damage
R have a negative effect on handling charac-
teristics and thus the driving safety (e.g.
hydroplaning) Underinflated or overinflated tires
Underinflated tires: G
WARNING
Tires with pressure that is too low can over-
heat and burst as a consequence. In addi-
tion, they also suffer from excessive and/or
irregular wear, which can severely impair the
braking properties and the driving character-
istics. There is a risk of an accident.
Avoid tire pressures that are too low in all
the tires, including the spare wheel.
Underinflated tires can:
R fail from being overheated
R adversely affect handling
R wear excessively and/or unevenly
R have an adverse effect on fuel consumption
Overinflated tires G
WARNING
Tires with excessively high pressure can
burst because they are damaged more eas-
ily by road debris, potholes etc. In addition,
they also suffer from irregular wear, which
can severely impair the braking properties
and the driving characteristics. There is a
risk of an accident.
Avoid tire pressures that are too high in all
the tires, including the spare wheel.
Overinflated tires can:
R increase the braking distance
R adversely affect handling
R wear excessively and/or unevenly
R adversely affect ride comfort
R be more susceptible to damage284
Tire pressure
Wheels and tires