2020 MERCEDES-BENZ METRIS battery

The residual heat function switches off auto-
matically
R after approximately
30 minutes
R if the starter battery's condition of charge is
too low
R when you switch on the ignition Adjusting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the
air vents. This could result in burns or frost-
bite in the immediate vicinity of the air
vents. There is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
The center and side air vents are adjustable.
The air vents can also be adjusted on vehicles
with rear-compartment air conditioning.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes: R keep the air inlet between the windshield
and the hood free of blockages, such as ice,
snow or leaves.
R never cover the vents or the ventilation
grilles in the vehicle interior. Setting the center air vents
:
Control for center air vent, left
; Control for center air vent, right =
Thumbwheel for center air vent, right
? Thumbwheel for center air vent, left
X To open/close: turn control : or ;
clockwise or counter-clockwise as far as it
will go.
X To adjust the air direction: hold side air
vent by control : or ; and move it up or
down.
X Using thumbwheel = or ? move center air
vent to the left or right. Setting the side air vents
:
Side air vent
; Control for side air vent
X To open/close: turn control ; to the left
or right as far as it will go.
X To adjust the air direction: hold side air
vent : by control ; and move it up or
down or to the left or right. 124
Adjusting the air vents
Climate control

Problems with the engine
Problem
Possible causes/consequences and
M SolutionsThe engine does not
start.
The starter motor can
be heard. There is a malfunction in the fuel supply.
X
Turn the key back to position g in the ignition lock before
attempting to start the engine again.
X Start the engine again.
Please bear in mind that lengthy and frequent starting attempts
will drain the battery.
If the engine does not start after several attempts: X Consult a qualified specialist workshop. The engine does not
start.
The starter motor can
be heard. The reserve
fuel warning lamp is lit
and the fuel gauge is at
0. The fuel tank has been run dry.
X Refuel the vehicle. The engine does not
start.
The starter motor can-
not be heard. The on-board voltage is too low. The battery is too weak or dis-
charged.
X Jump-start the vehicle ( Y page 272).
If the engine cannot be jump-started, the starter motor is faulty.
X Consult a qualified specialist workshop. The engine does not
start.
The starter motor can-
not be heard. The battery is discharged or faulty.
X
Check the battery for damage.
X Charge the battery (Y page
262).The engine is not run-
ning smoothly and is
misfiring. There is a malfunction in the engine electronics or a mechanical
component of the engine management system.
X Only depress the accelerator pedal slightly.
Unburnt fuel may otherwise get into the catalytic converter and
damage it.
X Have the cause rectified immediately at a qualified specialist
workshop. Automatic transmission
Important safety notes
G
WARNING
The vehicle can suddenly accelerate if the
engine speed is above the engine idling
speed and you then select transmission position h or k. There is a risk of an acci-
dent.
When engaging transmission position
h or
k at a standstill, always keep the brake
pedal depressed firmly and do not depress
the accelerator pedal at the same time. 130
Automatic transmission
Driving and parking

Problems with the fuel and fuel tank
If your vehicle is losing fuel, the fuel lines or
the fuel tank are defective. X Turn the key immediately to position 0 in
the ignition lock and remove it.
X Do not restart the engine under any circum-
stances.
X Consult a qualified specialist workshop. Parking
Important safety notes
G
WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact
with hot parts of the exhaust system or
exhaust gas flow. There is a risk of fire.
Park the vehicle so that no flammable mate-
rials come into contact with parts of the
vehicle which are hot. Take particular care
not to park on dry grassland or harvested
grain fields. G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R release the parking brake.
R shift the automatic transmission out of
the parking position P.
R start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle.
Never leave children unsupervised in the
vehicle. G
WARNING
If you park the vehicle with the transmission
in park position j and the parking brake is
not engaged, the vehicle may roll away.
Engaging park position j is not a fully ade- quate replacement for the parking brake.
There is a risk of accident and injury.
Secure the vehicle against rolling away as
described below.
! Always secure the vehicle correctly against
rolling away. Otherwise, the vehicle or its
drivetrain could be damaged.
! When the vehicle is parked, always remove
the key to prevent the battery from becom-
ing discharged.
Always park your vehicle safely and secure it
against rolling away. When parking, observe
the legal requirements of the country in which
you are currently driving.
Observe the following to ensure that the vehi-
cle is secured correctly to prevent it from roll-
ing away unintentionally: R the parking brake is applied.
R the transmission is in position j and the
key has been removed.
R on uphill or downhill gradients, the front
wheels are turned towards the curb. Parking brake
G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R release the parking brake.
R shift the automatic transmission out of
the parking position P.
R start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle.
Never leave children unsupervised in the
vehicle. G
WARNING
If you must brake the vehicle with the park-
ing brake, the braking distance is considera-
bly longer and the wheels could lock. There 138
ParkingDriving and parking

Parking the vehicle for a long period
If you leave the vehicle parked for longer than
four weeks, the battery may be damaged by
exhaustive discharging.
X Disconnect the battery (Y page 260).
or X Connect the battery to a trickle charger.
Be sure to observe the notes on charging
the batteries

(Y page 262).
You can obtain information about trickle
chargers from a qualified specialist work-
shop.
If you leave the vehicle parked for longer than
6 weeks, the vehicle may suffer damage as a
result of lack of use.
X Visit a qualified specialist workshop and
seek advice. Driving tips
General notes
Important safety notes G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could
affect, for example, the power steering and
the brake boosting effect. You will require
considerably more effort to steer and brake.
There is a risk of an accident.
Do not switch off the ignition while driving. G
WARNING
Mobile communications equipment distracts
the driver from traffic conditions. In addi-
tion, the driver could lose control of the
vehicle. There is a risk of an accident.
As a driver, use mobile communications
equipment only when the vehicle is at a
standstill.
As a vehicle occupant, use mobile communi-
cations equipment only in the designated
area, e.g. the rear passenger compartment. Observe the legal requirements of the country
in which you are driving. Some jurisdictions
prohibit the driver from using a mobile phone
while driving a vehicle.
Always use the hands-free system for tele-
phoning while driving. Only use the telephone
if road traffic conditions permit. If this is not
the case, pull over to a safe location before
using the telephone.
Bear in mind that at a speed of just 30 mph
(approximately

50 km/h), your vehicle is cov-
ering a distance of 44 feet (approximately
14 m) every second.
Drive sensibly – save fuel In order to save fuel, observe the following
tips:
X The tires should always be inflated to the
recommended tire pressure.
X Remove unnecessary loads.
X Remove roof carriers when they are not nee-
ded.
X Warm up the engine at low engine speeds.
X Avoid frequent acceleration or braking.
X Have all maintenance work carried out as
indicated by the service intervals in the
Maintenance Booklet or by the service inter-
val display.
Fuel consumption also increases when driving
in cold weather, in stop-start traffic and in
mountainous terrain.
Overrun cutoff If you are in overrun mode and take your foot
off the accelerator pedal, the fuel supply is cut
off when the engine speed is out of the idle
speed control range.
Drinking and driving G
WARNING
Drinking and driving and/or taking drugs
and driving are very dangerous combina-
tions. Even a small amount of alcohol or
drugs can affect your reflexes, perceptions
and judgment.
The possibility of a serious or even fatal
accident is greatly increased when you drink
or take drugs and drive. 140
Driving tips
Driving and parking

Active Parking Assist does not assist you park-
ing in spaces at right angles to the direction of
travel if:
R two parking spaces are located directly next
to one another
R the parking space is directly next to a low
obstacle such as a low curb
R you forward park
Active Parking Assist does not assist you park-
ing in spaces that are parallel or at right angles
to the direction of travel if:
R the parking space is on a curb
R the system reads the parking space as being
blocked, for example by foliage or grass
paving blocks
R the area is too small for the vehicle to
maneuver into
R the parking space is bordered by an obsta-
cle, e.g. a tree, a post or a trailer :
Detected parking space on the left
; Parking symbol
= Detected parking space on the right
If the driver's seat belt is fastened and all
doors are closed, Active Parking Assist is acti-
vated automatically when driving forwards.
The system is operational at speeds of up to
approximately
22 mph (35 km/h). While in
operation, the system independently locates
and measures parking spaces on both sides of
the vehicle.
Active Parking Assist will only detect parking
spaces:
R parallel or at right angles to the direction of
travel
R that are parallel to the direction of travel
and are at least 59 in (1.5 m) wide
R that are parallel to the direction of travel
and at least 40 in (1.0 m) longer than your
vehicle
R that are at right angles to the direction of
travel and at least 40 in (1.0 m) wider than
your vehicle i
Note that Active Parking Assist cannot
measure the length of a parking space if it is
at right angles to the direction of travel. You
will need to judge whether your vehicle will
fit in the parking space.
When the vehicle is driving at speeds of up to
approximately

20 mph (30 km/h), parking
symbol ; is shown as a status display in the
header.
The system detects and differentiates between
parking spaces which are parallel or at right
angles to the direction of travel. When a park-
ing space is detected, an arrow appears next
to parking symbol ; to indicate which side
the parking space is on. The parking space is
displayed while you are driving past it and until
you are approximately 50 ft (15 m) away from
it.
Active Parking Assist displays parking spaces
on the passenger side as standard. The park-
ing spaces on the driver's side are only dis-
played if you operate the turn signal on the
driver's side. When parking on the driver's
side, you must operate the turn signal until
you have started active parking assistance by
pressing the a button on the steering
wheel.
Parking G
WARNING
If you leave the driver's seat when the vehi-
cle is only being braked by Active Parking
Assist, the vehicle could roll away if:
R there is a malfunction in the system or in
the voltage supply.
R the electrical system in the engine com-
partment, the battery or the fuses are
tampered with.
R the battery is disconnected.
R the vehicle is accelerated, e.g. by a vehi-
cle occupant.
There is a risk of an accident.
Before leaving the driver's seat, always
secure the vehicle against rolling away.
If PARKTRONIC detects obstacles, Active Park-
ing Assist brakes automatically during the
parking process. You are responsible for brak-
ing in good time. Driving systems
161
Driving and parking Z

and the noseweight of the trailer drawbar
(TWR).
Trailer power supply
! Incorrect wiring of the connector plug
could, under certain circumstances, cause
malfunctions in the vehicle's other elec-
tronic systems. We therefore recommend
having the connector plug wired at a quali-
fied specialist workshop.
! You can connect accessories with a maxi-
mum power consumption of 240 W
to the
permanent power supply.
You must not charge a trailer battery using
the power supply.
Your vehicle may be equipped with various
electrical installations for trailer towing.
Depending on your trailer, you may need an
adapter to connect the electrical system of the
trailer with that of the vehicle.
The trailer socket of your vehicle is equipped
at the factory with a permanent power supply.
The permanent power supply is on the trailer
socket pin assignment 4.
Note that the permanent power supply of the
trailer is not switched off when the on-board
voltage is low. This can completely discharge
the starter battery of your vehicle.
Further information on the electrical equip-
ment currently installed on your vehicle and on
installing trailer electrics can be obtained at
any qualified specialist workshop. Towing a trailer
173
Driving and parking Z

Use the buttons in the instrument cluster.
X To display: press È to select the trip com-
puter display.
The values displayed relate to those meas-
ured since the trip computer was last reset.
X To reset values: press and hold 3 until all
values are reset.
The trip computer is automatically reset if the
value exceeds 9,999 hours or 99,999 miles.
You can set the unit of measurement for con-
sumption and distance in the Distance
Unit: submenu ( Y page 180).Range menu
Use the buttons in the instrument cluster.
X Press È to select the Range display.
The approximate range that can be covered
is calculated according to your current driv-
ing style and the amount of fuel in the tank.
If there is only a small amount of fuel left in
the fuel tank, the display shows a vehicle
being refueled Ï instead of the approxi-
mate range.
You can set the unit of measurement for dis-
tance in the Distance Unit: submenu
(Y page

180). Current fuel consumption menu
:
Recuperation display
; Range Use the buttons in the instrument cluster.
X Press È to select the fuel consumption bar
display.
Recuperation display : shows whether, and,
if so, how much kinetic energy is being trans-
formed into electric current whilst the vehicle
is coasting. The recuperated energy is then
stored in the starter battery. Recuperation dis-
play : is dependent on the engine installed
and is therefore not available in all vehicles.
You can set the unit of measurement for con-
sumption in the Distance Unit: submenu
(Y page

180). Digital speedometer menu
Use the buttons in the instrument cluster.
X Press È to select the speed display.
You can set the unit for the digital speedome-
ter in the Distance Unit: submenu
(Y page

180). Coolant temperature menu
G
WARNING
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. 178
On-board computer (vehicles without steering wheel buttons)
On-board computer and displays

If the display shows the speed in the header,
the outside temperature is additionally dis-
played on the lower edge of display panel
=.
You can switch the permanent display in the
header
(Y page 192).
Displaying the range and current fuel
consumption Using the steering wheel buttons
X Press = or ; to select the Trip
menu.
X Press : or 9 to select range : and
consumption ;.
Approximate range : is calculated on the
basis of your current driving style and the
amount of fuel in the tank. If there is only a
small amount of fuel left in the fuel tank, the
display shows a vehicle being refueled Ï
instead of the approximate range.
Recuperation display = shows whether, and,
if so, how much kinetic energy is being trans-
formed into electric current whilst the vehicle
is coasting. The recuperated energy is then
stored in the starter battery. Recuperation dis-
play = is dependent on the engine installed
and is therefore not available in all vehicles. Trip computer "From Start" or "From
Reset" :
Distance
; Length of journey
= Average fuel consumption
? Average speed
Using the steering wheel buttons
X Press = or ; to select the Trip
menu.
X Press : or 9 to select the From
Start or From Reset submenu.
The values in the From Start submenu are
calculated from the start of a journey whilst
the values in the From Reset submenu are
calculated from the last time the submenu was
reset (Y page

185).
The From Start trip computer function is
automatically reset in the following situations:
R the ignition has been switched off for more
than four hours.
R 999 hours have been exceeded.
R 9,999 miles have been exceeded.
The From Reset trip computer is automati-
cally reset if the value exceeds 9,999 hours or
99,999 miles. 184
On-board computer (vehicles with steering wheel buttons)
On-board computer and displays