2019 MERCEDES-BENZ METRIS ECU

Active Parking Assist does not assist you park-
ing in spaces at right angles to the direction of
travel if:
Rtwo parking spaces are located directly next
to one another
Rthe parking space is directly next to a low
obstacle such as a low curb
Ryou 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:
Rthe parking space is on a curb
Rthe system reads the parking space as being
blocked, for example by foliage or grass pav-
ing blocks
Rthe area is too small for the vehicle to maneu-
ver into
Rthe parking space is bordered by an obstacle,
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 activated
automatically when driving forwards. The sys-
tem is operational at speeds of up to approx-
imately 22 mph (35 km/h). While in operation,
the system independently locates and meas-
ures parking spaces on both sides of the vehicle.
Active Parking Assist will only detect parking
spaces:
Rparallel or at right angles to the direction of
travel
Rthat are parallel to the direction of travel and are at least 59 in (1.5 m) wide
Rthat are parallel to the direction of travel and
at least 40 in (1.0 m) longer than your vehicle
Rthat are at right angles to the direction of
travel and at least 40 in (1.0 m) widerthan
your vehicle
iNote 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 sym-
bol ;is shown as a status display in the header.
The syste m d
etects and differentiates between
parking spaces which are parallel or at right
angles to the direction of travel. When a parking
space is detected, an arrow appears next to
parking symbol ;to indicate which side the
parking space is on. The parking space is dis-
played 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 parking
spaces on the driver's side are only displayed 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
GWARNING
If you leave the driver's seat when the vehicle is only being braked by Active Parking Assist,
the vehicle could roll away if:
Rthere is a malfunction in the system or in
the voltage supply.
Rthe electrical system in the engine com-
partment, the battery or the fuses are tam-
pered with.
Rthe battery is disconnected.
Rthe vehicle is accelerated, e.g. by a vehicle
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 park- ing process. You are responsible for braking in
good time.
158Driving system s
Driving an d parking

Information on the audio system control knob
can be found in the separate operating
instructions.
Symbol=is highlighted. The distance spec-
ifications now only apply to objects that are at
the same level as the ball coupling.
XBack up carefully, making sure that trailer
drawbar locating aid ;points approximately
in the direction of trailer drawbar :.
XBack up carefully until trailer drawbar :rea-
ches red guide line A.
The distance between trailer drawbar :and
ball coupling ?is now approximately 12 in
(0.30 m).
XCouple the trailer (Ypage 165).
Towing a trailer
Notes on trailer towing
Important safety notes
GWARNING
Installing an unsuitable ball coupling may
result in overloading of the trailer tow hitch
and the rear axle. This applies especially if the ball coupling in question is longer or angled
differently. This could seriously impair the
driving characteristics and the trailer can
come loose. There is a risk of an accident.
You should only ever install a ball coupling
that has the permissible dimensions and that
is designed to meet your trailer-towing
requirements. Do not modify the ball coupling
or the trailer tow hitch.
GWARNING
If you install a ball coupling other than the one
delivered with the vehicle, the trailer tow hitch
and the rear axle may be overloaded. This
applies especially if the ball coupling in ques-
tion is longer or angled differently. This could
seriously impair the driving characteristics
and the trailer can come loose. There is a risk
of an accident.
Only install the ball coupling delivered with
the vehicle or a ball coupling that is designed
to meet your trailer towing requirements. Do
not modify the ball coupling or the trailer tow
hitch.
GWARNING
If the ball coupling is not correctly installed
and secured, it could come loose while driving and endanger other road users. There is a risk
of an accident and injury.
Install and secure the ball coupling as descri-
bed in the ball coupling manufacturer's instal-
lation instructions. Make sure that the ball
coupling is correctly installed and secured
before every journey.
GWARNING
When the vehicle/trailer combination begins
to lurch, you could lose control of it. The vehi- cle/trailer combination could even rollover.
There is a risk of an accident.
On no account should you attempt to
straighten up the vehicle/trailer combination
by increasing the speed. Reduce vehicle
speed and do not countersteer. Apply the
brake as necessary.
You can attach carrier systems such as bicycle
racks or load-bearing implements on the ball
coupling. The maximum load-bearing capacity
of 165 lb (75 kg) applies when using carrier sys-
tems on the ball coupling.
Always observe the operating instructions pro-
vided by the manufacturers of the trailer cou-
pling and the ball coupling.
Couple and decouple the trailer carefully. When
backing up the towing vehicle, make sure
nobody is standing between the vehicle and the trailer.
A trailer which is incorrectly coupled to the tow-
ing vehicle could break away. A correctly cou-
pled trailer must be positioned horizontally
behind the towing vehicle.
Ensure that the following weights are not excee-
ded:
Rthe permissible noseweight
Rthe permissible trailer load
Rthe permissible rear axle load of the towing
vehicle
Towing a trailer165
Driving and parking
Z

This enables you to gain experience and get
used to the new handling characteristics.
RBefore driving, check:
-that the trailer tow hitch and ball coupling
are secure
-that the safety switch for a braked trailer is
functioning properly
-that the safety chains are secure and not
damaged
-that the electrical connections are secure
-that the lights are working
-that the wheels are in good order and the
tire pressure is correct
RAdjust the exterior mirrors to provide an
unobstructed view of the rear section of the
trailer.
RIf the trailer is equipped with a separate func-
tional braking system, check before each
journey whether the brakes are functioning
correctly.
RSecure the load on the trailer according to the
applicable specifications and current stand-
ards on securing loads (
Ypage 246).
RWhen driving with a trailer, check at regular
intervals that the load is secured and that the
brakes and lights are working.
RBear in mind that the handling will be less
stable when towing a trailer than when driving
without one. Avoid sudden steering move-
ments.
RThe vehicle/trailer combination is heavier,
accelerates more slowly and has a decreased
gradient climbing capability and a longer
braking distance.
It is more susceptible to crosswinds and
requires cautious steering.
RIf possible, do not brake suddenly, but rather
moderately at first so that the trailer can acti-
vate its brakes. Then increase the force on the
brake pedal.
RIf the automatic transmission repeatedly
shifts between gears when driving on inclines,
restrict the shift range. Select shift range 4,3,
2 or 1.
Driving in a low gear and at a low speed
reduces the risk of damaging the engine.
RWhen driving on a downhill gradient, shift to a
low gear and take advantage of the engine's
braking effect. Avoid continuous brake application as this
may overheat the vehicle brakes and, if instal-
led, the trailer brakes.
RIf the coolant temperature increases dramat-
ically while the air-conditioning system is
switched on, switch off the air-conditioning
system.
Coolant heat can also be dissipated by
switching the airflow and the temperature of
the air conditioning to the
maximum level.
Open t

he windows if necessary.
RWhen overtaking, pay particular attention to
the extended length of your vehicle/trailer
combination.
Due to the length of your vehicle/trailer com-
bination you need an additional distance
before you can return to your original lane.
Uncoupling a trailer
GWARNING
If you uncouple a trailer with the overrun
brake engaged, you could trap your hand
between the vehicle and the trailer drawbar.
There is a risk of injury.
Do not uncouple a trailer if the overrun brake
is engaged.
!Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your vehicle could
be damaged by the rebounding of the overrun
brake.
XMake sure that the selector lever of the auto-
matic transmission is in position P.
XEngage the vehicle's parking brake.
XClose all doors.
XApply the parking brake of the trailer.
XIn addition, secure the trailer against rolling
away with a wheel chock or similar object.
XRemove the trailer cable and safety chains
and decouple the trailer.
168Towing a trailer
Driving and parking

Use the buttons in the instrument cluster.
XTo display:pressÈto select the trip com-
puter display.
The values displayed relate to those meas-
ured since the trip computer was last reset.
XTo reset values: press and hold3until 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 (Ypage 177).
Range menu
Use the buttons in the instrument cluster.
XPressÈto select the Rangedisplay.
The approximate range that can be covered is calculated according to 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 Ïinstead of the approximate
range.
You can set the unit of measurement for dis-
tance in the Distance Unit:
submenu
(Ypage 177).
Current fuel consumption menu
:Recuperation display
;Range Use the buttons in the instrument cluster.
XPress
Èto 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 display :is
dependent on the engine installed and is there-
fore not available in all vehicles.
You can set the unit of measurement for con-
sumption in the Distance Unit:
submenu
(Ypage 177).
Digital speedometer menu
Use the buttons in the instrument cluster.
XPress Èto select the speed display.
You can set the unit for the digital speedometer
in the Distance
Unit:submenu (Ypage 177).
Coolant temperature menu
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.
Use the buttons in the instrument cluster.
XPress Èto select the ?coolant temper-
ature bar display.
Under normal operating conditions and with the
specified coolant level, the gauge may rise to
248 ‡ (120 †).
On-board computer (vehicles without steering wheel buttons)175
On-board computer and displays
Z

In status areaD, the display can show the sta-
tus of the following driving systems:
À ATTENTION ASSIST (
Ypage 152)
à Lane Keeping Assist (
Ypage 150)
V Cruise control (
Ypage 144)
è Rear window wiper (
Ypage 106)
è ECO start/stop function (
Ypage 125)
Menu overview
You can think of the order of the menus as a
circle. Use the =or; steering wheel
buttons to show the menu bar and scroll through
the menus. Use the :or9 steering
wheel buttons to scroll through their submenus and functions.
Operation information can be found under
"Operating the on-board computer"
(
Ypage 178).
Depending on the vehicle equipment, you can
call up the following menus:
RTripmenu (Ypage 180)
RNavimenu (navigation instructions)
(Ypage 182)
RAudiomenu (Ypage 183)
RTel(telephone) menu (Ypage 184)
RAssist.(assistance) menu (Ypage 185)
RServicemenu (Ypage 187)
RSettingsmenu (Ypage 188)
Trip menu
Standard display
Odometer
XPress and hold the %steering wheel but-
ton until the Tripmenu with trip odometer :
and odometer ;appears.
If the display shows the speed in the header, the
outside temperature is additionally displayed on
the lower edge of display panel =.
You can switch the permanent display in the
header (
Ypage 188).
Displaying the range and current fuel
consumption
Using the steering wheel buttons
XPress =or; to select the Tripmenu.
XPress:or9 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 Ïinstead 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 display =is
dependent on the engine installed and is there-
fore not available in all vehicles.
180On-board computer (vehicles with steering wheel buttons)
On-board computer and displays

Activating/deactivating interiorlighting
delayed switch-off
If you activat eth eInteriorLightingDelay:function ,th einterio rlightin gremains lit for a
further 20 seconds.
Usin gth esteering whee lbuttons
XUse th e= or; buttonto select th e
Settings.menu.
XUse : or9 to select Lights.
XPressato confirm .
XUse: or9 to select th eInteriorLighting Delayfunction .
The curren tstatus appears.
XTo switch on/of f:press aagain.
Vehicle submenu
Setting the sensitivity of thera in sensor
Usin gth esteering whee lbuttons
XPress =or; to select th eSettingsmenu.
XPress :or9 to select Vehicle.
XPressato confirm .
XPress:or9 to select th eRai nSen ‐sor Sensitivityfunction .
The display shows th ecurren tsetting.
XPress ato chang eth esetting.
XPress :or9 to select th eHig h,
Standardor Lowsetting. This settin gcontrol s
th erain sensor's sensitivit yto precipitation.
The windshield wiper then wipes mor eor less
frequently at th esame precipitatio nintensity.
XPress th ea buttonto store th eentry.
You can fin dfurther information under "Wind-
shield wiper " (
Ypage 106).
Switching the automatic locking featu re
on/off
Usin gth esteering whee lbuttons
XPress =or; to select th eSettingsmenu.
XPress :or9 to select Vehicle.
XPressato confirm .
XPress:or9 to select th eAutomaticDoo rLoc kfunction .
The curren tstatus is shown.
XTo act ivate/deact ivate:pressaagain.
If you activat eth eAutomatic
Doo rLockfunc-
tion, your vehicl ewill loc kautomatically from a
spee dof approximately 15 km/h.
You can fin dfurther information under "Auto-
matic door lock" (
Ypage 74).
Activating/deactivating the acoustic
locking confi rmation
Usin gth esteering whee lbuttons
XPress =or; to select th eSettingsmenu.
XPress :or9 to select Vehicle.
XPressato confirm .
XPress:or9 to select AcousticLockFeedback.
The curren tstatus is shown.
XTo act ivate/deact ivate:pressaagain.
If you activat eth eAcoustic Loc kFeedback
function ,an acoustic tone sounds when th e
vehicl eis locked.
Restoring the factory settings
Usin gth esteering whee lbuttons
XPress =or; to select th eSettingsmenu.
XPress :or9 to select FactorySet ‐ting.
XPress ato confirm .
The Reset All Settings?function is dis-
played.
XPress :or9 to select NoorYes.
XPress ato confirm th echoice.
If you select Yes,th edisplay shows aconfir-
mation message .
190On-board computer (vehicles with steering wheel buttons)
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
FrontPassengerAir‐bag Disabled
+
The front-passenger air bag is deactivated during th ejourney eve n
though th efront-passenger seat is occupied by an adult or aperson
wit h a statur ecorrespondin gto that of an adult .
If additional force sare applie dto th eseat or th eoccupant is no tsitting
on th eseat properly (
Ypage 53), theweigh tth esystem detects may
be to olow.
GWARNIN G
The front-passenger fron tair bag will no tdeploy in th eevent of an
accident.
There is an increased ris kof injury.
XStop th evehicl eimmediately, payin gattention to roa dand traffic
conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 135).
XSwitchoff th eignition .
XThe fron tpassenger mus tget out of th evehicle.
XMak esur ethat th efront-passenger seat is unoccupied ,close th e
front-passenger door and switch on th eignition .
XObserveth ePASSENGER AIRBA GOF Findicator lamp in th ecenter
console and th edisplay message sand chec kth efollowing:
Seat unoccupied and ignition switched on :
RThe PASSENGER AIRBAGOF Findicator lamp mus tligh tup contin-
uously. If th eindicator lamp is on ,th eOccupant Classification Sys -
te m (OCS )has disabled th efro
nt-passenger air bag
(Ypage 53).
RThe display mus tno tsho wthemessage sFrontPassengerAir ‐bag Enable dorFront Passenger Airbag Disabled.
XWait for at least on eminute until th enecessar ysystem checks hav e
been completed.
XEnsur ethat th edisplay does no tsho weither of th etwo display
message sabout th efront-passenger fron tair bag.
If these condition sare met ,th efront-passenger seat can be occupied
again .
If these condition sare no tmet ,th eOccupant Classification Syste m
(OCS )is malfunctioning .
XVisitaqualified specialist workshop immediately.
Further information on th eOccupant Classification Syste m(OCS )can
be found under "Occupant Classification Syste m(OCS)" (
Ypage 53).
Display messages (vehicles without steering wheelbu ttons)193
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
FrontPassengerAir‐bag Enable d
+
The front-passenger fron tair bag is enabled during th ejourney eve n
though th efront-passenger seat :
Ris occupied byachild in achild restrain tsystem, or aperson of small
statur e
or
Ris no toccupied.
The system may detec tobjects or force sthat are addin gto th eweigh t
applie dto th eseat .
GWARNIN G
The front-passenger air bag may deploy unintentionally.
There is an increased ris kof injury.
XStop th evehicl eimmediately, payin gattention to roa dand traffic
conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 135).
XSwitchoff th eignition .
XOpenth efront-passenger door .
XRemove thechild and th echild restrain tsystem from th efront-
passenger seat .
XMakesur ethere are no objects applyin gadditional weigh tto th e
seat .
The system may otherwise detec tth eadditional weigh tand inter-
pre tth evehicl eseat occupant's weigh tas greate rthan it actually is.
XMak esur ethat th efront-passenger seat is unoccupied ,close th e
front-passenger door and switch on th eignition .
XObserveth ePASSENGER AIRBA GOF Findicator lamp in th ecenter
console and th edisplay and chec kth efollowing:
Seat unoccu
pied and ignition switched on :
RThe PASSENGER AIRBAGOF Findicator lamp mus tligh tup contin-
uously. If th eindicator lamp is on ,th eOccupant Classification Sys -
te m (OCS )has disabled th efront-passenger air bag (
Ypage 53).
RThe display mus tno tsho wthemessage sFrontPassengerAir ‐bag Enable dorFront Passenger Airbag Disabled.
XWait for at least on eminute until th enecessar ysystem checks hav e
been completed.
XEnsur ethat th edisplay does no tsho weither of th etwo display
message sabout th efront-passenger fron tair bag.
If these condition sare met ,th efront-passenger seat can be occupied
again .Observ eth enote son th eOccupant Classification Syste m
(OCS ) (
Ypage 53) .
If these condition sare no tmet ,th eOccupant Classification Syste m
(OCS )is malfunctioning .
XInstall thechild restrain tsystem on asuitable rear seat .
or
XSeat aperson of small statur eon asuitable rear seat .
XVisitaqualified specialist workshop immediately.
194Display messages (vehicles without steering wheelbu ttons)
On-board computer and displays