2020 MERCEDES-BENZ METRIS steering

Use cruise control if road and traffic condi-
tions make it appropriate to maintain a steady
speed for a prolonged period. You can set any
speed from 30 km/h
upwards in increments of
1 km/h and 10 km/h.
If you have set Miles as the unit for the digital
speedometer , you can set any speed above
20 mph in increments of 1 mph and 5 mph.
Changing the display unit for the digital speed-
ometer and the distance:
R on vehicles without steering wheel buttons
(Y page 180)
R on vehicles with steering wheel buttons
(Y page 192)
Cruise control should not be activated when
driving off-road or on construction sites.
Cruise control may be unable to maintain the
stored speed on uphill gradients. The stored
speed is resumed if the uphill gradient evens
out and the vehicle's speed does not fall below
20 mph (30 km/h). Cruise control maintains
the stored speed on downhill gradients by
automatically applying the brakes. Observe the
additional driving tips (Y page 142).
Important safety notes Observe the notes on braking (Y page

142).
If you fail to adapt your driving style or if you
are inattentive, cruise control can neither
reduce the risk of an accident nor override the
laws of physics. Cruise control cannot take
road, weather and traffic conditions into
account. Cruise control is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time and for staying in lane.
If you change wheel size, make sure they cor-
respond to the correct wheel size category
(Y page 278). If the category is changed with- out recoding the control units in the vehicle,
the functioning of cruise control may be
impaired.
Do not use cruise control:
R in traffic conditions that are unsuitable for
driving at a constant speed, e.g. in heavy
traffic, on winding roads or off-road.
R on slippery roads. Braking or accelerating
may cause the drive wheels to lose traction
and the vehicle could then skid.
R when there is poor visibility, e.g. due to fog,
heavy rain or snow. If there is a change of drivers, make sure that
you inform the new driver about the set cruise
speed.
Cruise control lever and display :
To activate and store the current speed or
a higher speed
; To activate at the last stored speed
= To activate and store the current speed or
a lower speed
? To deactivate cruise control
The cruise control lever is the lower lever on
the left of the steering column.
When you activate cruise control, the display
briefly shows the Cruise Control message
and the stored speed.
The display also shows the V symbol and
the stored speed:
R in the header on vehicles without steering
wheel buttons (Y page

176)
R in the status area on vehicles with steering
wheel buttons (Y page 183)
Activation conditions To activate cruise control, all of the following
activation conditions must be fulfilled:
R the parking brake must be released. The
F (only USA) or J (only Canada) indi-
cator lamp in the instrument cluster goes
out
R ESP ®
must be switched on, but not currently
intervening or performing a control action
R you are driving faster than

20 mph
(30 km/h)
R the brake pedal is not depressed Driving systems
147
Driving and parking Z

Storing and maintaining the current
speed
X
Accelerate the vehicle to the desired speed
above 20 mph (30 km/h
).
X Briefly push the cruise control lever up : or
down =.
X Release the accelerator pedal.
Cruise control is activated. The current
speed is stored and shown briefly in the dis-
play's text field.
The display also shows the V symbol and
the stored speed:
R in the header on vehicles without steering
wheel buttons (Y page

176)
R in the status area on vehicles with steer-
ing wheel buttons (Y page 183)
Resuming the stored speed G
WARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate
or brake unexpectedly. There is a risk of an
accident.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If
you do not know the stored speed, store the
desired speed again.
X Briefly pull the cruise control lever towards
you ;.
X Release the accelerator pedal.
Cruise control is activated and resumes the
vehicle's speed to the last speed stored.
The stored speed is shown briefly in the dis-
play.
The display also shows the V symbol and
the stored speed:
R in the header on vehicles without steering
wheel buttons (Y page

176)
R in the status area on vehicles with steer-
ing wheel buttons (Y page 183)
i When you pull the cruise control lever
towards you for the first time after starting
the engine, cruise control adopts the cur-
rent speed. Setting the speed It may be a moment before the vehicle starts
to accelerate or brake to the set speed. Take
this delay into account when setting the
speed.
X
Press the cruise control lever up : to
increase the speed or down = to reduce
the speed.
The vehicle will accelerate or decelerate.
The speed is shown in the display.
X Release the cruise control lever once the
desired speed is reached.
The displayed speed is stored.
or
X Briefly press the cruise control lever as far
as the 1st pressure point up : or down =.
The last speed stored is increased/reduced
in increments of

1 mph (1 km/h).
or X Briefly press the cruise control lever beyond
the pressure point up : or down =.
The last speed stored is increased/reduced
in increments of

5 mph (10 km/h).
i Cruise control is not deactivated if you
depress the accelerator pedal. If you accel-
erate briefly to overtake, for example, cruise
control resumes the vehicle’s speed to the
last speed stored after you have finished
overtaking.
Deactivating cruise control There are various ways to deactivate cruise
control:
X Briefly press the cruise control lever for-
wards ?.
or X Apply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off
the engine.
Cruise control is deactivated automatically
when:
R you apply the brakes
R you apply the parking brake and the F
(only USA) or J (only Canada) indicator
lamp in the instrument cluster lights up
R you are driving slower than

20 mph
(30 km/h) 148
Driving systems
Driving and parking

means of intermittent vibration through the
steering wheel for up to
1.5 seconds.
Important safety notes G
WARNING
Lane Keeping Assist cannot always clearly
detect lane markings.
In such cases, Lane Keeping Assist can:
R give an unnecessary warning
R not give a warning
There is a risk of an accident.
Always pay particular attention to the traffic
situation and keep within the lane, espe-
cially if Lane Keeping Assist alerts you. G
WARNING
The Lane Keeping Assist warning does not
return the vehicle to the original lane. There
is a risk of an accident.
You should always steer, brake or accelerate
yourself, in particular if warned by Lane
Keeping Assist.
If you fail to adapt your driving style, Lane
Keeping Assist can neither reduce the risk of
accident nor override the laws of physics.
Lane Keeping Assist cannot take into account
road, weather or traffic conditions. Lane Keep-
ing Assist is only an aid. You are responsible
for the distance to the vehicle in front, for
vehicle speed, braking in good time and for
staying in your lane.
Lane Keeping Assist does not keep your vehi-
cle in its lane.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to insuffi-
cient illumination of the road, or due to
snow, rain, fog or spray
R there is glare, e.g. from oncoming traffic,
the sun or reflection from other vehicles
(e.g. if the road surface is wet)
R the windshield is dirty, fogged up, damaged
or covered, for instance by a sticker, in the
vicinity of the camera
R there are no lane markings, or several
unclear lane markings for one lane, e.g.
around construction sites R
the lane markings are worn away, dark or
covered up, e.g. by dirt or snow
R the distance to the vehicle in front is too
short and thus the lane markings cannot be
detected
R the lane markings change quickly, e.g. lanes
branch off, cross one another or merge
R the road is narrow and winding
R there are highly variable shade conditions
on the road
Deactivating and activating Lane Keep-
ing Assist X
Press the Ç button.
If the indicator lamp in the button lights up
and the display shows the Ç symbol in
the status area, Lane Keeping Assist is
switched on but not ready for use.
If you are driving with Lane Keeping Assist
activated at speeds above

40 mph
(60 km/h) and lane markings are detected,
the display shows the Ç symbol highligh-
ted in the status area. Lane Keeping Assist
is then ready for use. Status indicators in the status overview submenu
The display in the Status Overview submenu
of the on-board computer also shows the sta-
tus of Lane Keeping Assist

(Y page 189). If
Lane Keeping Assist is activated but not ready
for use, the display shows the lane markings in
the symbol as broken lines :. If Lane Keeping154
Driving systems
Driving and parking

For vehicles with steering wheel buttons you
can have the current ATTENTION ASSIST
(Attention Level) assessment displayed.
X Select Status Overview in the Assist.
menu and display the attention level
(Y page
189).
The following information is displayed: R the length of the journey since the last
break.
R the attention level determined by ATTEN-
TION ASSIST, displayed in a bar display in
five levels from low to high.
R if ATTENTION ASSIST is unable to calculate
the attention level and cannot output a
warning, the System Passive message
appears in the display. The bar display is
then dimmed. This is the case, for example,
if you are predominantly driving at a speed
below

40 mph (60 km/h) or above 125 mph
(200 km/h).
Activating ATTENTION ASSIST X
Activating ATTENTION ASSIST with the on-
board computer:
R on vehicles without steering wheel but-
tons

(Y page 180)
R on vehicles with steering wheel buttons
(Y page 190)
For vehicles with steering wheel buttons,
the system determines the attention level of
the driver depending on the setting selec-
ted:
Standard: the sensitivity with which the
system determines the attention level is set
to normal.
Sensitive: the sensitivity is set higher. The
driver is warned earlier.
When ATTENTION ASSIST is switched on and
the vehicle engine is running: R on vehicles without steering wheel buttons,
the À indicator lamp in the instrument
cluster lights up
R on vehicles with steering-wheel buttons, the
display shows the À symbol:
- in the status area
- in the Status Overview of the Assist.
menu (Y page

189)
For vehicles with steering wheel buttons, if you
deactivate ATTENTION ASSIST, the system is
automatically re-activated when you start the engine. The system sensitivity then corre-
sponds to the last selection activated – stand-
ard or sensitive.
If you switch off ATTENTION ASSIST in a vehi-
cle without steering wheel buttons, the system
remains switched off even after you start the
engine. The status of the system after switch-
ing on the engine always corresponds to the
status last selected.
Warning in the display If the system detects tiredness or increasing
lapses in concentration, the warning
Atten‐
tion Assist: Take a Break! or Attent.
Asst: Take Break!is shown in the display.
An additional warning tone sounds.
X If necessary, take a break.
X Confirm the message by pressing the a
button on the steering wheel.
On long journeys, take regular breaks in good
time to allow yourself to rest. If you do not
take a break and ATTENTION ASSIST contin-
ues to detect increasing lapses in concentra-
tion, you will be warned again after

15 minutes
at the earliest. This will only happen if ATTEN-
TION ASSIST still detects typical indicators of
fatigue or increasing lapses in concentration. PARKTRONIC
General notes PARKTRONIC is an electronic parking aid. The
system is equipped with ultrasonic sensors in
the front and rear bumpers to monitor the area
around your vehicle. PARKTRONIC indicates
visually and audibly the distance between your
vehicle and an object.
Your vehicle features two separate sound
emitters with different frequencies for the
warning tones. The warning ranges in front of
and behind the vehicle are indicated by differ-
ent warning tones.
PARKTRONIC is activated automatically when
you:
R turn the key to position 2 in the ignition lock
R release the parking brake and
R move the selector lever to position D, N or R156
Driving systems
Driving and parking

When you deactivate PARKTRONIC, Active
Parking Assist will also be deactivated.
For vehicles with a trailer coupling installed,
the minimum length for parking spaces will be
slightly increased.
If you have attached a trailer to your vehicle,
you should not use Active Parking Assist. Once
the electrical connection is established
between your vehicle and the trailer, Active
Parking Assist is no longer available.
PARKTRONIC is then deactivated for the rear
area.
G
WARNING
While parking or pulling out of a parking
space, the vehicle swings out and can drive
onto areas of the oncoming lane. This could
result in a collision with another road user.
There is a risk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Active
Parking Assist parking procedure.
! If they cannot be avoided, drive over
obstacles such as curbs slowly and at an
obtuse angle. Otherwise, you may damage
the wheels or tires.
Active Parking Assist may also display spaces
not suitable for parking, e.g.:
R in a zone where parking or stopping is pro-
hibited
R in front of driveways or entrances and exits
R on unsuitable surfaces
Parking tips:
R on narrow roads, drive as closely as possible
past the parking space.
R parking spaces that are littered or over-
grown might be identified or measured
incorrectly.
R parking spaces that are partially occupied
by trailer drawbars might not be identified
as such or be measured incorrectly.
R snowfall or heavy rain may lead to a parking
space being measured inaccurately.
R when transporting a load which protrudes
from your vehicle, you should not use Active
Parking Assist.
R never use Active Parking Assist when snow
chains are installed. R
always ensure that the tire pressure is cor-
rect This has a direct influence on the park-
ing characteristics of the vehicle.
R if you mount wheels with a different wheel
size, this will have a direct influence on the
parking result.
R if you mount tires from another manufac-
turer, this may have an influence on the
parking result.
R if you drive slowly past the parking space, a
better parking result is achieved.
R pay attention to the PARKTRONIC warning
messages ( Y page
158) during the parking
procedure.
R you can intervene in the steering procedure
to correct it at any time. Parking assistance
will then be canceled and Active Parking
Assist stopped.
Use Active Parking Assist for parking spaces
that are:
R parallel or at right angles to the direction of
travel.
R on straight roads, not bends.
R on the same level as the road, e.g. not on
the pavement.
Detecting parking spaces G
WARNING
If there are objects above the detection
range:
R Active Parking Assist may steer too early
R the vehicle may not stop in front of these
objects
This could cause a collision. There is a risk
of an accident.
If objects are located above the detection
range, stop and deactivate Active Parking
Assist.
Objects located above the detection range of
Active Parking Assist will not be detected
when the parking space is measured. These
are not taken into account when the parking
procedure is calculated, e.g. overhanging
loads, overhangs or truck loading ramps.
Further information about the detection range
(Y page

157).160
Driving systems
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

X
Bring the vehicle safely to a stop when the
parking symbol shows the desired parking
space in the instrument cluster.
X Shift the transmission to position k.
The display shows the Start Park
Assist? Yes: OK No: % message and
the location of the parking space.
X To cancel the process: press the % but-
ton on the steering wheel or drive off.
or X To park using active parking assistance:
press the a button on the steering
wheel.
The display shows the
Park Assist
Active: Accelerate and Brake Obs.
Surroundings message.
X Let go of the steering wheel.
X Reverse the vehicle, being ready to brake at
all times. Exit the parking space slowly and
do not drive faster than
6 mph (10 km/h).
Otherwise parking assistance is canceled
and Active Parking Assist is stopped.
Active Parking Assist brakes the vehicle to a
standstill when the vehicle approaches the
rear border of the parking space.
Maneuvering may be required in tight parking
spaces. The display shows the Park Assist
Active: Select D Obs. Surroundings
message.
X While the vehicle is stationary, shift the
transmission to position h.
Active Parking Assist immediately steers in
the other direction. The display shows the
Park Assist Active: Accelerate and
Brake Obs. Surroundings message.
i You will achieve the best results by waiting
for the steering procedure to complete
before pulling away.
X Drive forwards and be ready to brake at all
times.
Active Parking Assist brakes the vehicle to a
standstill.
The display shows the Park Assist
Active: Select R Obs. Surroundings
message.
As soon as the parking procedure is complete,
the Park Assist Finished message appears
in the display and a tone sounds. The parking
assistance function of Active Parking Assist is
stopped. The vehicle is parked and kept sta-
tionary without the driver having to depress the brake pedal. The braking effect is canceled
when you depress the accelerator pedal.
Active Parking Assist no longer supports you
with steering interventions and brake applica-
tions. Once active parking assistance has been
stopped, you must steer and brake again your-
self. PARKTRONIC is still available.
Parking tips:
R The way your vehicle is positioned in the
parking space after parking is dependent on
various factors. These include the position
and shape of the vehicles parked in front
and behind it and the conditions of the loca-
tion. It may be the case that Active Parking
Assist guides you too far into a parking
space, or not far enough into it. In some
cases, it may also lead you across or onto
the curb. In this case, cancel the active
parking assistance.
R You can also engage transmission position
h prematurely. The vehicle redirects and
does not drive as far into the parking space.
If you change direction too early, parking
assistance is canceled and Active Parking
Assist is stopped. It is then not possible to
achieve a sensible parking position from the
current position.
Exiting a parking space In order that Active Parking Assist can assist
you when exiting the parking space, the follow-
ing conditions must be fulfilled:
R the border of the parking space must be
high enough at the front and the rear, a
curb, for instance, is not sufficient.
R the border of the parking space must not be
too wide. Your vehicle can be maneuvered
into a position at a maximum of 45° to the
starting position in the parking space.
R a maneuvering distance of at least

3.3 ft
(1.0 m) must be available.
Active Parking Assist can only assist you with
exiting a parking space if you have parked the
vehicle parallel to the direction of travel using
Active Parking Assist.
If PARKTRONIC detects obstacles, Active Park-
ing Assist brakes automatically when exiting
from the parking space. You are responsible
for braking in good time. 162
Driving systems
Driving and parking

X
Start the engine.
X Switch on the turn signal in the direction in
which you are pulling away.
X Shift the transmission to position h or k.
The display shows the message Start
Park Assist? Yes: OK No: %.
X To cancel the process: press the % but-
ton on the steering wheel or drive off.
or
X To exit the parking space using active
parking assistance: press the a button
on the steering wheel.
The display shows the message Park
Assist Active: Accelerate and Brake
Obs. Surroundings.
X Let go of the steering wheel.
X Pull away, being ready to brake at all times.
Exit the parking space slowly and do not
drive faster than
6 mph (10 km/h). Other-
wise parking assistance is canceled and
Active Parking Assist is stopped.
Active Parking Assist brakes the vehicle to a
standstill when the vehicle approaches a
border of the parking space.
X While the vehicle is stationary, shift the
transmission to position h or k as
required or according to the message.
Active Parking Assist immediately steers in
the other direction. The display shows the
message Park Assist Active: Acceler‐
ate and Brake Obs. Surroundings.
i You will achieve the best results by waiting
for the steering procedure to complete
before pulling away.
If you back up after activation, the steering
wheel is moved to the straight-ahead posi-
tion.
X Drive forwards and reverse as prompted by
the PARKTRONIC warning displays, several
times if necessary.
Once you have exited the parking space com-
pletely:
R The display shows the Park Assist Fin‐
ished message.
R A tone sounds.
R The steering wheel is moved to the straight-
ahead position
The parking assistance function of Active Park-
ing Assist is stopped. You will then have to
steer and merge into traffic on your own.
PARKTRONIC is still available. You can take over the steering before the vehi-
cle has exited the parking space completely.
This is useful, for example when you recognize
that it is already possible to pull out of the
parking space.
Canceling active parking assistance X
Stop the movement of the steering wheel or
steer yourself.
or X Press the f button and deactivate
PARKTRONIC
(Y page 158).
Parking assistance is canceled immediately
and Active Parking Assist is stopped. The
display shows the Park Assist Canceled
message.
Active parking assistance is canceled automat-
ically in the following cases:
R you apply the parking brake.
R parking using Active Parking Assist is no
longer possible.
R you are driving faster than

6 mph
(10 km/h).
R a wheel spins and ESP ®
intervenes or fails.
The ÷ warning lamp in the instrument
cluster then lights up.
R you unfasten your seat belt.
R you open a door or the tailgate/rear-end
door.
R you shift the transmission to position j.
A warning tone sounds, the parking symbol in
the display goes out and the Park Assist
Canceled message appears.
Once active Parking Assist has been canceled,
you must steer and brake again yourself.
If a system malfunction occurs, vehicles are
automatically braked down to a standstill. To
continue driving, you must depress the accel-
erator pedal again. Rear view camera
General notes On vehicles with a tailgate, the rear view cam-
era is next to the tailgate handle
(
Y page

267).
On vehicles with rear-end doors, the rear view
camera is in the top of the license plate mold-
ing ( Y page 267). Driving systems
163
Driving and parking Z