cooling MERCEDES-BENZ METRIS 2020 MY20 Operator’s Manual

1, 2, 3 ...
12-V socket ........................................ 241A
ABS (anti-lock braking system) Display message (vehicle with
steering wheel buttons)

................. 210
Display message (vehicle without
steering wheel buttons) ................. 196
Function/notes ................................ 67
Important safety notes .................... 67
Warning lamp ................................. 230
Accident
Automatic measures after an
accident ........................................... 60
Activating/deactivating cooling
with air dehumidification ................. 118
Active Parking Assist
Canceling/stopping active park-
ing assistance ................................ 163
Detecting parking spaces .............. 160
Display message ............................ 221
Exiting a parking space .................. 162
Function/notes ............................. 159
Important safety notes .................. 159
Parking .......................................... 161
Towing a trailer .............................. 159
Add-on equipment ............................... 33
Additional indicators
Replacing bulbs ............................. 107
Additional speedometer
On-board computer (vehicle with
steering wheel buttons) ................. 192
On-board computer (vehicle with-
out steering wheel buttons) ........... 180
Additives
Engine oil ....................................... 309
Gasoline ......................................... 307
Air bag
Display message (vehicle with
steering wheel buttons) ................. 211
Display message (vehicle without
steering wheel buttons) ................. 197
Air bags
Deployment ..................................... 58 Front air bag (driver, front
passenger)

....................................... 52
Important safety notes .................... 51
Introduction ..................................... 51
Occupant Classification System
(OCS) ............................................... 54
PASSENGER AIR BAG OFF indica-
tor lamp ........................................... 47
Side impact air bag .......................... 52
Window curtain air bag .................... 53
Air pressure
see Tire pressure
Air vents
Important safety notes .................. 124
Setting the center air vents ........... 124
Setting the rear-compartment air
vents .............................................. 125
Setting the side air vents ............... 124
Air-conditioning system
see Climate control
Alarm system
see ATA (Anti-Theft Alarm system)
Alertness assist
see ATTENTION ASSIST
Ambient lamp
Changing a bulb (front door) .......... 104
Changing a bulb (tailgate) .............. 104
Changing a bulb (vanity mirror) ...... 104
Anti-lock braking system
see ABS (Anti-lock Braking System)
Anti-skid chains
see Snow chains
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Anti-theft protection
see ATA (Anti-Theft Alarm system)
Armrests .............................................. 95
Ashtray ............................................... 240
ATA (Anti-Theft Alarm system) ........... 70
ATTENTION ASSIST
Activating/deactivating (vehicle
with steering wheel buttons) ......... 190
Activating/deactivating (vehicle
without steering wheel buttons) .... 180
Display messages (vehicle with
steering wheel buttons) ................. 221
Display messages (vehicle with-
out steering wheel buttons) ........... 206 4
Index

Cooling with air dehumidification .. 118
Defrosting the windows .................
122
Defrosting the windshield .............. 121
Important safety notes .................. 114
Information on dual-zone auto-
matic climate control ..................... 116
Information on TEMPMATIC (air-
conditioning system) ..................... 115
Overview of systems ...................... 114
Problem with the rear window
defroster ........................................ 122
Rear-compartment air condition-
ing ................................................. 117
Refrigerant ..................................... 311
Refrigerant filling capacity ............. 312
Setting the air distribution ............. 120
Setting the air vents ...................... 124
Setting the airflow ......................... 120
Setting the temperature ................ 119
Switching air-recirculation mode
on/off ............................................ 123
Switching on/off ........................... 117
Switching residual heat on/off ...... 123
Switching the rear window
defroster on/off ............................ 122
Switching the synchronization
function on and off ........................ 121
TEMPMATIC control panel (air
conditioning) .................................. 115
Clock
Setting (vehicle without steering
wheel buttons) ............................... 181
Co-driver's seat
see Seats
Cockpit
Instrument cluster (vehicle with
steering wheel buttons) ................... 40
Overview .......................................... 37
see Instrument cluster
Coffee cup symbol
see ATTENTION ASSIST
COLLISION PREVENTION ASSIST
Activating/deactivating the dis-
tance warning function .................. 190
Adaptive Brake Assist .................... 150
Display message ............................ 222
Distance warning function ............. 149
Operation/notes ............................ 149 Collision warning
see COLLISION PREVENTION ASSIST
COMAND display
Cleaning
......................................... 268
Combination switch .......................... 101
Communications equipment
Operation ....................................... 241
Type approval/frequency .............. 304
Constant headlamp mode
see Daytime running lamps
Consumption statistics
Fuel (vehicle with steering wheel
buttons) ......................................... 184
Fuel (vehicle without steering
wheel buttons) ............................... 177
Control panel
Above the windshield ....................... 44
Center console ................................ 43
Climate control ................................ 43
Driver's door .................................... 44
Convenience closing feature .............. 85
Convenience opening
With the SmartKey ......................... 123
Convenience opening feature ............ 85
Conversions/equipment .................... 33
Coolant (engine)
Adding ........................................... 255
Checking the level ......................... 253
Display messages (vehicle with
steering wheel buttons) ................. 220
Display messages (vehicle with-
out steering wheel buttons) ........... 204
Displaying the temperature (on-
board computer) ............................ 178
Filling capacity ............................... 311
Notes ............................................. 310
Temperature display in the
instrument cluster ......................... 175
Warning lamp ................................. 233
Cooling
see Climate control
Crosswind Assist ................................. 70
Cruise control
Activating ....................................... 148
Activation conditions ..................... 147
Cruise control lever ....................... 147
Deactivating ................................... 1488
Index

Useful information
This Operator's Manual describes all models
as well as standard and optional equipment of
your vehicle that were available at the time of
going to print. Country-specific variations are
possible. Note that your vehicle may not be
equipped with all of the described functions.
This also applies to systems and functions rel-
evant to safety.
Read the information on qualified specialist
workshops (Y page
32).Overview of climate control systems
Important safety notes
Observe the recommended settings on the fol-
lowing pages. Otherwise, the windows could
fog up.
To prevent the windows from fogging up:
R only switch off climate control briefly
R only switch on air-recirculation mode briefly
R for vehicles with air-conditioning system or
dual-zone automatic climate control, switch
on the "Cooling with air dehumidification"
function
R for vehicles with dual-zone automatic cli-
mate control, switch on the windshield
defrosting function briefly, if required Climate control regulates the temperature and
the humidity in the vehicle interior and filters
undesirable substances from the air.
Climate control is only operational when the
engine is running. The system only functions
optimally when the side windows are closed.
Ventilate the vehicle for a brief period during
warm weather. In order to cool the vehicle
more rapidly, switch climate control to air-
recirculation mode briefly. This will speed up
the cooling process and the desired interior
temperature will be reached more quickly.
The integrated filter can filter out most parti-
cles of dust and completely filters out pollen.
In vehicles with dual-zone automatic climate
control, gaseous pollutants and odors will also
be reduced. A clogged filter reduces the air-
flow into the vehicle interior. For this reason,
you should always observe the interval for
replacing the filter, which is specified in the
Maintenance Booklet. As the interval between
changes depends on environmental condi-
tions, e.g. heavy air pollution, the interval may
be shorter than stated in the Maintenance
Booklet. 114
Overview of climate control systems
Climate control

Control panel for the air-conditioning system
:
Sets the temperature (Y page 119)
z Defrosts the windshield (Y page
121)
; / Switches the rear-compartment air conditioning on/off
(Y page 117)
= _ Sets the air distribution (Y page
120)
¯ Defrosts the windshield (Y page
121)
? h Activates/deactivates air-recirculation mode (Y page
123)
A K Sets the airflow ( Y page
120)
z Defrosts the windshield (Y page
121)
B ¿ Switches the cooling with air dehumidification function on/off (Y page
118)
C ¤ Switches the rear window defroster and mirror heating on/off
(Y page 122) Optimum use of the air-conditioning
system
Below, you can find a number of notes and
recommendations to help you use the air-con-
ditioning system optimally. R Switch on the cooling with air dehumidifica-
tion function. The indicator lamp in the
¿ switch comes on when the function is
switched on.
R Set the temperature to

72 ‡ (22 †). Only
change the temperature in small incre-
ments. R
Only use the settings for defrosting the
windshield briefly, until the windshield is
clear again.
R Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odors or
when in a tunnel. The windows could other-
wise fog up as no fresh air is drawn into the
vehicle in air-recirculation mode. The indica-
tor lamp in the h switch comes on when
the function is switched on. Overview of climate control systems
115
Climate control

Control panel for 3-zone automatic climate control
:
Sets temperature to the left and at rear (only for vehicles with rear air conditioning)
(Y page 119)
; Ã Activates automatic mode – controls the climate control automatically
(Y page 119)
= ¬ Defrosts the windshield
(Y page 121)
? K Increases the airflow
(Y page 120)
A Ä Sets the air distribution (Y page
120)
B Display
C h Switches air-recirculation mode on or off
(Y page 123)
D / Switches operation to rear air conditioning (2nd menu level) ( Y page
117)
E Sets temperature to the right and at rear (only for vehicles with rear air conditioning)
( Y page

119)
F 0 Switches synchronization on or off
(Y page 121)
G ¿ Switches the cooling with air dehumidification function on or off ( Y page 118)
H I Reduces the airflow
(Y page 120)
I ¤ Switches the rear window defroster and mirror heating on or off (Y page
122)
J Ì Switches the residual heat utilization on or off ( Y page
123)Optimum use of 3-zone automatic
climate control
Below, you can find a number of notes and
recommendations to help you use 3-zone
automatic climate control optimally. R Activate automatic mode. All basic functions
are controlled automatically. The indicator
lamp in the à switch comes on when the
function is switched on.
R Switch on the cooling with air dehumidifica-
tion function. The indicator lamp in the
¿ button comes on when the function is
switched on. R
Set the temperature to
72 ‡ (22 †) for
both sides. Only change the temperature in
small increments.
R Only use the "Windshield defrosting" func-
tion briefly until the windshield is clear
again. The indicator lamp in the ¬ button
comes on when the function is switched on.
R Only use air-recirculation mode briefly, e.g.
if there are unpleasant outside odors or
when in a tunnel. The windows could other-
wise fog up as no fresh air is drawn into the
vehicle in air-recirculation mode. The indica-
tor lamp in the h button comes on when
the function is switched on. 116
Overview of climate control systems
Climate control

Rear-compartment air-conditioning
system
Vehicles with air-conditioning system
X Switch on air-conditioning system.
X To activate/deactivate: press the /
button on the air-conditioning system con-
trol panel.
The indicator lamp in the / button
comes on when the rear-compartment air
conditioning is switched on. The settings for
temperature, airflow and, in the case of
rear-compartment air conditioning, air distri-
bution are adopted for the rear-compart-
ment air conditioning.
Vehicles with dual-zone automatic cli-
mate control
X Switch on dual-zone automatic climate con-
trol.
X To switch on: press the / button on the
control panel.
The indicator lamp in the / button
flashes. The control panel display shows the
second menu level for the temperature and
airflow setting of the rear-compartment air
conditioning.
X Press the K button and set blower set-
ting 1 or above for the rear-compartment air
conditioning.
The blower settings are shown in the display
as a bar graph. The rear-compartment air
conditioning is switched on.
X If necessary set the temperature for the
rear-compartment air conditioning using
temperature control : or E (Y page
116).
The display shows the selected rear-com-
partment temperature.
If you do not make any more settings for
approximately ten seconds, the control
panel display shows menu level 1 again for
the automatic climate control settings. The
indicator lamp in the / button remains
lit.
i The air distribution setting applies both to
automatic climate control and to the rear-
compartment air conditioning and cannot be
set separately for the two.
X To switch off: press the / button on the
control panel.
The indicator lamp in the / button
flashes. The control panel display shows the second menu level for the temperature and
airflow setting of the rear-compartment air
conditioning.
X Press the I button and, after reaching
the lowest blower speed, press it again.
The control panel display goes off and the
rear-compartment air conditioning is
switched off.
If you do not make any more settings for
approximately ten seconds, the control
panel display shows menu level 1 again for
the automatic climate control settings. The
indicator lamp in the / button goes out. Switching the cooling with air dehu-
midification function on/off
Important safety notes The cooling with air dehumidification function
of the air conditioning or automatic climate
control is only available when the engine is
running. The air inside the vehicle is cooled
and dehumidified according to the tempera-
ture selected.
Condensation may appear on the underside of
the vehicle when in cooling mode. This is nor-
mal and not a sign that there is a malfunction.
If you switch off the "Cooling with air dehumid-
ification" function, the air inside the vehicle
will not be cooled (in warm weather) or dehu-
midified. Therefore, only switch off the "Cool-
ing with air dehumidification" function briefly.
Otherwise, the windows will fog up more
quickly.
Switching on and off For dual-zone automatic climate control, the
function for automatic climate control settings
can only be activated or deactivated on the
first menu level. If you do not set a new value
for the rear-compartment climate control in
the second menu level within approx. ten sec-
onds, the control panel display goes back to
the first menu level.
X Press the ¿ button.
The indicator lamp in the ¿ switch
comes on when the function is switched on.
i The cooling with air dehumidification func-
tion has a delayed switch-off feature. 118
Operating the climate control system
Climate control

Regulating climate control automati-
cally
General notes When dual-zone automatic climate control is in
automatic mode, the set temperature is auto-
matically kept constant. The system automati-
cally regulates the temperature of the dis-
pensed air, the airflow and the air distribution.
Automatic mode will achieve optimal operation
if the cooling with air dehumidification func-
tion is also activated. If desired, the cooling
with air dehumidification function can be deac-
tivated (
Y page 118).
Dual-zone automatic climate control Automatic mode for automatic climate control
settings can only be activated or deactivated
on the first menu level. If you do not set a new
value for the rear-compartment climate control
in the second menu level within approx. ten
seconds, the control panel display goes back
to the first menu level.
X Switch on climate control ( Y page 117).
X Set temperature for the driver's and front-
passenger side and, for vehicles with rear-
compartment air conditioning, for the rear
compartment, too

(Y page 119).
X To switch automatic mode on or off:
press the à button.
If the indicator lamp in the
à button
lights up, automatic mode is activated. The
airflow and air distribution are controlled
automatically and the windshield defrosting
function is deactivated.
If you deactivate automatic mode, the auto-
matic climate control system saves the current
settings.
In automatic mode, if you adjust the airflow or
air distribution manually, the indicator lamp
above the à button goes out. The function
which has not been changed manually, how-
ever, continues to be controlled automatically. Setting the temperature
Air-conditioning system X
Switch on climate control ( Y page
117).
X To increase or reduce: turn temperature
control : clockwise or counter-clockwise.
When doing so, only change the tempera-
ture in small increments, and start in the
center position or at

72 ‡ (22 †)
( Y page 115).
Dual-zone automatic climate control You can set the temperature separately for the
driver's and co-driver's side. In vehicles with
rear-compartment air conditioning, the tem-
perature for the rear compartment can be set
additionally. Each set temperature is automati-
cally maintained at a constant level.
X Switch on climate control (Y page
117).
X To increase or reduce: turn temperature
control : or E clockwise or counter-clock-
wise ( Y page

116). When doing so, only
change the temperature in small increments
starting at 72 ‡ (22 †).
The control panel display shows the set
temperature for the left and right side at the
respective edge of the display.
Rear-compartment air-conditioning
system Vehicles with air-conditioning system
X Switch on climate control ( Y page
117).
The air conditioning settings for tempera-
ture, airflow and, for rear-compartment air
conditioning, also the setting for air distribu-
tion are also applied to the rear-compart-
ment climate control.
Vehicles with dual-zone automatic cli-
mate control X Switch on climate control ( Y page
117).
X To increase or decrease: press the /
button on the control panel of the automatic
climate control.
The indicator lamp in the / button
flashes. The control panel display shows the
second menu level for the temperature and Operating the climate control system
119
Climate control

When you deactivate the windshield defrosting
function, the previous automatic climate con-
trol settings are reactivated with the exception
of air-recirculation mode. Air-recirculation
mode remains deactivated. Clearing condensation from the win-
dows
Windows fogged up on the inside Air-conditioning system
You should only select this setting until the
windows are clear again.
X Switch on the rear window defroster if nec-
essary
(Y page 122).
X Switch on climate control (Y page
117).
X Switch off air-recirculation mode
(Y page

123).
X Turn temperature control : clockwise to a
higher temperature and air flow control A
to a blower speed between 3 and 6
( Y page

115).
X If possible, only select the ¯ setting of
the air distribution
(Y page 120).
Only the indicator lamp in the ¯ button
lights up.
X Switch on the cooling with air dehumidifica-
tion function

(Y page 118).
X If the windows still fog up, set the climate
control functions as described for defrosting
of the windshield

(Y page 121).
Dual-zone automatic climate control You should only select this setting until the
windows are clear again.
X Switch on the rear window defroster if nec-
essary

(Y page 122).
X Switch on climate control (Y page
117).
X Switch off air-recirculation mode
(Y page

123).
X Switch on the cooling with air dehumidifica-
tion function
(Y page 118).
X Switch on automatic mode ( Y page
119).
X If the windows continue to fog up, switch on
the windshield defrosting function
( Y page

121). Windows fogged up on the outside You should only select this setting until the
windshield is clear again.
X Switch on the windshield wipers
(Y page

109).
X Switch on climate control (Y page
117).
X In warm and damp weather, do not allow
cold air to flow onto the windows. Close the
side air vents if required

(Y page 124). Switching the rear window defroster
on/off
General notes The rear window defroster consumes a lot of
power. You should therefore switch off the
rear window defroster as soon as the rear win-
dow is clear.
X Turn the key to position 2 in the ignition
lock.
X Press the ¤ button on the control panel.
If the indicator lamp in the ¤ button
lights up, the rear window defroster is
switched on.
The rear window defroster switches off auto-
matically after a few minutes.
Problems with the rear window
defroster The rear window defroster has switched off
prematurely or cannot be activated.
The vehicle starter battery is not sufficiently
charged.
X Switch off any consumers that are not
required, e.g. reading lamps, interior lighting
or seat heating.
When the battery is sufficiently charged, the
rear window defroster can be activated
again.122
Operating the climate control system
Climate control

Switching air-recirculation mode
on/off
Important safety notes You can deactivate the intake of fresh air if
unpleasant odors enter the vehicle from out-
side. The air inside the vehicle is then circula-
ted.
When you switch on air-recirculation mode,
the side windows and windows could fog up
more quickly, in particular at low outside tem-
peratures. Only switch on air-recirculation
mode for a short time.
Air-conditioning system or dual-zone
automatic climate control X
Switch on climate control ( Y page 117).
X Press the h button.
If the indicator lamp in the h button
lights up, air-recirculation mode is activated.
Air-recirculation mode switches on automati-
cally: R at high outside temperatures
R while driving in a tunnel (only vehicles with a
navigation system)
The indicator lamp in the h button is then
not lit up. Outside air is added automatically
after about

30 minutes.
Air-recirculation mode is deactivated automati-
cally:
R after approximately five minutes at outside
temperatures below about 45 ‡ (7 †)
R after approximately five minutes when the
cooling with air-dehumidification function is
deactivated
R after approximately 30 minutes at outside
temperatures above about 45 ‡ (7 †) and
when the cooling with air-dehumidification
function is active Convenience opening/pre-entry cli-
mate control
G
WARNING
During convenience opening, body parts
could be drawn in or become trapped
between the side window and the door
frame. There is a risk of injury. Monitor the entire opening procedure when
using convenience opening. When opening,
make sure that nobody touches the side
window. Release the % switch immedi-
ately if somebody becomes trapped, to
interrupt the opening procedure.
X Pre-entry climate control and conveni-
ence opening with the key:
press and hold
the % button on the key.
The side windows open automatically and
the blower of the climate control system is
activated.
X Release the % button.
i At high interior temperatures, the blower is
also switched on when a door is opened.
This means that slightly cooled air enters
the vehicle interior after the engine is star-
ted, to cool the vehicle more rapidly. Switching the residual heat function
on/off
General notes Only vehicles with dual-zone automatic climate
control have the residual heat function.
Once the engine is switched off, it is possible
to make use of the residual heat of the engine
to continue heating or ventilating the front
compartment of the vehicle for approximately
30 minutes. The heating or ventilation time
depends on the set interior temperature.
Switching the function on/off X
Turn the key to position 0 in the ignition
lock or remove it.
X Press the Ì button.
If the residual heat function is activated, the
indicator lamp in the Ì button comes on.
The blower will run at a low speed regard-
less of the airflow setting.
If you activate the residual heat function at
high temperatures, only the auxiliary ventila-
tion will be activated. The blower then runs
at medium speed. Operating the climate control system
123
Climate control Z

Setting the rear-compartment air
vents
Rear air vents (example: right-hand side of vehi-
cle)
:
Thumbwheel for vertical adjustment of the
airflow and air quantity control
; Thumbwheel for horizontal adjustment of
the airflow
The air vents can only be adjusted on vehicles
with rear-compartment air conditioning.
Vehicles with rear-compartment air condition-
ing: in heating mode, the air in the rear com-
partment is automatically distributed in the
footwells and roof area after the coolant has
reached the required temperature. In cooling
mode, in the initial phase the air is distributed
in the footwells and roof area of the hot vehi-
cle, and subsequently only in the roof area.
X To open: turn thumbwheel : of the rear air
vent to the center position.
X To close: turn thumbwheel : to the upper
or lower end position. Adjusting the air vents
125Climate control Z