cooling MERCEDES-BENZ CLS 2018 Owners Manual

1, 2, 3 ...4ETS (Electronic Traction System)
see ETS/4ETS (Electronic Trac-
tion System)
4MATIC (permanent all-wheel
drive)
Function/notes ............................ .1 63
12 V socket
see Sockets
360° camera
Cleaning ......................................... 274
Display in the multimedia system .. 175
Function/notes ............................ .1 73
AABS (Anti-lock Braking System)
Display message ............................ 204
Function/notes ................................ 64
Important safety notes .................... 64
Warning lamp ................................. 229
Accident
Automatic measures after an acci-
dent ................................................. 58
Activating media mode
General notes ................................ 241
Activating/deactivating cooling
with air dehumidification ................. 116
Active Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 196
Display message ............................ 217
Function/information .................... 182
Active Driving Assistance package .. 182
Active Lane Keeping Assist
Activating/deactivating (on-
board computer) ............................ 197
Display message ............................ 217
Function/information .................... 184
Active multicontour seat
Adjusting (on the seat) ..................... 97
Active Parking Assist
Detecting parking spaces .............. 166
Display message ............................ 217
Exiting a parking space .................. 168
Function/notes ............................. 165
Important safety notes .................. 165 Parking .......................................... 167
ADAPTIVE BRAKE ................................. 72
Adaptive Brake Assist
Function/notes ................................ 68
Adaptive Damping System (ADS) ..... 160
Adaptive Highbeam Assist
Display message ............................ 212
Function/notes ............................. 107
Switching on/off ........................... 108
Additives (engine oil) ........................ 326
Address book
see also Digital Operator's Man-
ual .................................................. 236
Adjusting the volume
Audio 20 ........................................ 237
COMAND ....................................... 237
Air bags
Deployment ..................................... 53
Display message ............................ 210
Front air bag (driver, front
passenger) ....................................... 47
Important safety notes .................... 46
Introduction ..................................... 46
Knee bag .......................................... 47
Occupant Cla ssification System
(
OCS) ............................................... 49
PASSENGER AIR BAG OFF indica-
tor lamp ........................................... 42
Pelvis air bag ................................... 48
Side impact air bag .......................... 47
Window curtain air bag .................... 49
AIR FLOW ........................................... 117
Air vents
Glove box ....................................... 121
Important safety notes .................. 121
Rear ............................................... 121
Setting ........................................... 121
Setting the center air vents ........... 121
Setting the side air vents ............... 121
Air-conditioning system
see Climate control
AIRMATIC
Display message ............................ 215
Function/notes ............................. 159
Alarm
ATA (Anti-Theft Alarm system) ......... 75
Switching off (ATA) .......................... 754
Index

Windows ....................................... .2 73
Wiper blades .................................. 273
Wooden trim .................................. 275
Cargo tie down rings ......................... 246
CD
see also Digital Operator's Man-
ual ................................................. .2 36
CD player (on-board computer) ....... .1 93
Center console
Lower section .................................. 37
Lower section (AMG vehicles) .......... 38
Upper section .................................. 36
Central locking
Automatic locking (on-board com-
puter) ............................................. 199
Locking/unlocking (SmartKey) ....... .7 6
Child
Restraint system .............................. 59
Child seat
Forward-facing restraint system ...... 62
LATCH-type (ISOFIX) child seat
anchors ............................................ 60
On the front-passenger seat ............ 61
Rearward-facing restraint system .... 62
Top Tether ...................................... .6 0
Child-proof locks
Important safety notes .................... 62
Rear doors ...................................... .6 3
Children
Special seat belt retractor .............. .5 8
Cigarette lighter ................................ 252
Cleaning
Mirror turn signal .......................... .2 74
Climate control
Automatic climate control (3-
zone) .............................................. 114
Controlling automatically .............. .1 17
Coo ling w ith air dehumidification .. 116
Defrosti
ng the windows ................. 119
Defrosting the windshield .............. 118
Dual-zone automatic climate con-
trol ................................................. 112
General notes ................................ 112
Indicator lamp ................................ 117
Information about using auto-
matic climate control ..................... 115
Maximum cooling .......................... 119
Overview of systems ..................... .1 12 Problem with the rear window
defroster ........................................ 120
Problems with cooling with air
dehumidification ............................ 117
Rear control panel ......................... 114
Refrigerant ..................................... 327
Refrigerant filling capacity ............. 328
Setting the air distribution ............. 118
Setting the air vents ..................... .1 21
Setting the airflow ......................... 118
Setting the climate mode (AIR
FLOW) ............................................ 117
Setting the temperature ................ 117
Setting the temperature with 3-
zone automatic climate control ..... 117
Setting the temperature with dual-
zone automatic climate control ..... 117
Switching air-recirculation mode
on/off ............................................ 120
Switching on/off ........................... 116
Switching residual heat on/off ...... 120
Switching the rear window
defroster on/off ............................ 119
Switching the ZONE function
on/off ............................................ 118
Cockpit
Overview .......................................... 33
see Instrument cluster
Collapsible spare wheel
Inflating ......................................... 319
see Emergency spare wheel
COLLISION PREVENTION ASSIST
PLUS
Activating/deactivating ................. 196
Display message ............................ 206
Operation/notes .............................. 67
COMAND
Switching on/off ........................... 237
COMAND display
Cleaning ................................... ...... 275
C o mbination switch .......................... 106
Connecting a USB device
see also Digital Operator's Man-
ual ................................................. .2 36
Consumption statistics (on-board
computer) .......................................... 191
Controller .......................................... .2 37
Convenience box ............................... 246Index 7

Convenience closing feature .............. 88
Convenience opening feature ............ 88
Coolant (engine)
Checking the level ........................ .2 68
Display message ............................ 213
Filling capacity ............................... 327
Important safety notes .................. 326
Temperature (on-board computer,
Mercedes-AMG vehicles) .............. .2 01
Temperature gauge ........................ 188
Warning lamp ................................. 232
Cooling
see Climate control
Copyright ............................................. 32
Cornering light function
Display message ............................ 212
Function/notes ............................ .1 07
Cruise control
Activation conditions ..................... 148
Cruise control lever ....................... 148
Deactivating ................................... 149
Display message ............................ 220
Driving system ............................... 148
Function/notes ............................ .1 48
Important safety notes .................. 148
Setting a speed .............................. 149
Storing and maintaining current
speed ............................................. 148
Cup holder
Center console .............................. 249
Center console in the rear com-
partment ........................................ 249
Important safety notes .................. 248
Rear compartment ......................... 249
Customer Assistance Center
(CAC) ..................................................... 29
Customer Relations Department ....... 29
D
Dashboard
see Instrument cluster
Data
see Technical data
Data carrier
Selecting ........................................ 193
Daytime running lamps
Display message ............................ 212 Function/notes ............................ .1 05
Switching on/off (on-board com-
puter) ............................................. 198
Delayed switch-off
Exterior lighting (on-board com-
puter) ............................................. 198
Interior lighting .............................. 199
Diagnostics connection ..................... .2 9
Digital Operator's Manua l
Help ................................................ .2 4
Introduction .................................... .2 4
Digital speedomete r ........................ .1 91
DIRECT SELECT lever
Automatic transmission ................. 130
Display messages
ASSYST PLUS ................................ 269
Calling up (on-board computer) ..... 203
Driving systems ............................ .2 15
Engine ............................................ 213
General notes ................................ 203
Hiding (on-board computer) ........... 203
KEYLESS-GO .................................. 225
Lights ............................................. 212
Safety systems .............................. 204
SmartKey ....................................... 225
Tires ............................................... 221
Vehicle .......................................... .2 23
Distance recorder ............................ .1 90
Distance warning (warning lamp) .... 234
Distance warning function
Function/notes ................................ 68
DISTRONIC PLUS
Activating ....................................... 151
Activation conditions ..................... 151
Deactivating ................................... 155
Display message ............................ 218
Displays in the multifunction dis-
play ................................................ 154
Function/notes ............................. 149
Important safety notes .................. 150
Se tti
ng the specified minimum
distance ......................................... 153
Stopping ........................................ 153
Doors
Automatic locking (on-board com-
puter) ............................................. 199
Automatic locking (switch) ............... 828
Index

Overview of climate control systems
General notes Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To prevent the windows from fogging up: R
switch off climate control only briefly R
switch on air-recirculation mode only briefly R
switch on the cooling with air dehumidifica-
tion function R
switch on the defrost windshield function
briefly, if required
Climate control regulates the temperature and
the humidity in the vehicle interior and filters
undesirable substances out of the air.
Climate control can only be operated when the
engine is running. Optimum operation is only
achieved with the side windows and roof closed.
The residual heat function can only be activated
or deactivated with the ignition switched off
( Y
page 120). i Ventilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature ( Y
page 88). This will speed
up the cooling process and the desired inte-
rior temperature will be reached more
quickly.
i The integrated filter filters out most parti-
cles of dust and soot and completely filters
out pollen. It also reduces gaseous pollutants
and odors. A clogged filter reduces the
amount of air supplied to the vehicle interior.
For this reason, you should always observe
the interval for replacing the filter, which is
specified in the Maintenance Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Maintenance Book-
let.
i It is possible that the residual heat function
may be activated automatically an hour after
the SmartKey is removed. The vehicle is then
ventilated for 30 minutes to dry the automatic
climate control.
Control panel for dual-zone automatic climate control
Canada only
C
Sets the temperature, left ( Y
page 117)
D
Defrosts the windshield ( Y
page 118)

Problems with the "Cooling with air dehumidification" function Problem
Possible causes/consequences and P Solutions
The indicator lamp in the
Z button flashes
three times or remains
off. The "Cooling with air
dehumidification" func-
tion cannot be switched
on. Cooling with air dehumidification has been deactivated due to a mal-
function. X
Visit a qualified specialist workshop.
Setting climate control to automatic
General notes In automatic mode, the set temperature is main-
tained automatically at a constant level. The
system automatically regulates the temperature
of the dispensed air, the airflow and the air dis-
tribution.
The "Cooling with air dehumidification" function
is activated automatically in automatic mode.
Automatic control X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 123).X
Set the desired temperature. X
To switch on: press the X button.
The indicator lamp in the X button lights
up. Automatic air distribution and airflow are
activated.
3-zone automatic climate control: when auto-
matic mode is activated, you can set the climate
mode ( Y
page 117).X
To switch to manual mode: press the

Switch off the "Windshield defrosting" function
as soon as the windshield is clear again. X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 123).X
To activate: press the d button.
The indicator lamp in the d button lights
up.
The climate control system switches to the
following functions: R
high airflow R
high temperature R
air distribution to the windshield and front
side windows R
air-recirculation mode off
If the battery is not sufficiently charged, blower
output may be reduced. Once the battery is suf-
ficiently charged again, full blower output will be
available again. X
To deactivate: press the d button.
The indicator lamp in the d button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
MAX COOL maximum cooling The MAX COOL function is only available in vehi-
cles for the USA.
MAX COOL is only operational when the engine
is running. X
To activate: press the

Problems with the rear window defroster Problem
Possible causes/consequences and P Solutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. The battery has not been sufficiently charged. X
Switch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window defroster
can be activated again.
Switching air-recirculation mode
on/off
General notes You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle from
outside. The air already inside the vehicle will
then be recirculated.
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
Activating/deactivating X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 123).X
To activate: press the r button.
The indicator lamp in the r button lights
up.
Dual-zone automatic climate control: air-recir-
culation mode is automatically activated at high
outside temperatures.
3-zone automatic climate control: air-recircula-
tion mode is automatically activated at high lev-
els of pollution or at high outside temperatures.
When air-recirculation mode is activated auto-
matically, the indicator lamp above the r
button does not light up. Outside air is added
after approximately 30 minutes. X
To deactivate: press the r button.
The indicator lamp in the r button goes
out. Air-recirculation mode deactivates automati-
cally: R
after approximately five minutes at outside
temperatures below approximately 41 ‡
(5 †) R
after approximately five minutes if cooling
with air dehumidification is deactivated R
after approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †) if the "Cooling with air dehumidifica-
tion" function is activated
Switching the residual heat on or off
General notes The residual heat function is only available with
3-zone automatic climate control.
It is possible to make use of the residual heat of
the engine to continue heating the vehicle for
approximately 30 minutes after the engine has
been switched off. The heating time depends on
the set interior temperature.
Activating/deactivating X
Turn the SmartKey to position 0 in the ignition
lock or remove it ( Y
page 123).X
To switch on: press the K button.
The indicator lamp in the K button lights
up.
If the residual heat function is activated, the
windows may fog up on the inside.
The blower will run at a low speed regardless of
the airflow setting.
If you activate the residual heat function at high
temperatures, only the ventilation will be acti-
vated. The blower runs at medium speed.120
Operating the climate control systems
Climate control

Gasoline engines MB-Freigabe or
MB-Approval
All models
229.5
Use only SAE 0W-40 or SAE 5W-40 engine oils
for Mercedes ‑ AMG vehicles.
i MB approval is indicated on the oil contain-
ers.
Filling capacities The following values refer to an oil change
including the oil filter.
Model Capacity
CLS 400
CLS 400 4MATIC 6.9 US qt (6.5 l)
CL S 550
CLS 550 4MATIC 8.5 US qt (8.0 l)
Mercedes ‑ AMG
vehicles 9.0 US qt (8.5 l)
Ad ditives
! Do not use any additives in the engine oil.
This could damage the engine.
Brake fluid
G WARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the brake
fluid is too low, vapor pockets may form in the
brake system when the brakes are applied
hard. This would impair braking efficiency.
There is a risk of an accident.
You should have the brake fluid renewed at
the specified intervals.
Comply with the important safety notes for ser-
vice products when handling brake fluid
( Y
page 323).
The brake fluid change intervals can be found in
the Maintenance Booklet. Only use brake fluid approved by Mercedes-
Benz in accordance with MB-Freigabe or MB-
Approval 331.0.
Information about approved brake fluid can be
obtained at any qualified specialist workshop or
on the Internet at
http://bevo.mercedes-benz.co m.
i Have the brake fluid regularly replaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Coolant
Important safety notes
G WARNING
If antifreeze comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly clean the
antifreeze from components before starting
the engine.
! Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants can be found
in the Mercedes-Benz Specifications for Ser-
vice Products, MB BeVo 310.1, e.g. on the
Internet at http://bevo.mercedes-benz.com.
Or contact a qualified specialist workshop.
! Always use a suitable coolant mixture, even
in countries where high temperatures prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
i Have the coolant regularly replaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Comply with the important safety notes for ser-
vice products when handling coolant
( Y
page 323).326
Service products and filling capacities
Technical data

The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the fol-
lowing tasks: R
Anti-corrosion protection R
Antifreeze protection R
Raising the boiling point
If the coolant has antifreeze protection down to
-35 ‡ (-37 †), the boiling point of the coolant
during operation is approximately 266 ‡
(130 †).
The antifreeze concentrate/corrosion inhibitor
concentration in the engine cooling system
should: R
be at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35 ‡ (-37 †). R
not exceed 55% (antifreeze protection down
to -49 ‡[ -45 †]) . Otherwise , hea t will no t be
dissipated as effectively.
Mercedes-Ben z recommends an antifreeze/
corrosion inhibitor concentrat e in accordance
wit h MB Specification s fo r Servic e Products
310.1.
i Whe n th e vehicle is first delivered, it is filled
wit h a coolan t mixture that ensures adequat e
antifreez e an d anti-corrosio n protection .
i The coolan t is checke d wit h ever y mainte-
nanc e interval at a qualifie d specialis t work-
shop.
Filling capacities Model Capacity
CLS 400
CLS 400 4MATIC Approx . 10.9 US qt
(10. 3 l)
CLS 550
CLS 550 4MATIC Approx . 11.5 US qt
(10. 9 l)
Mercedes ‑ AMG
vehicles Approx . 11.4 US qt
(10. 8 l)
Windshield washer syste m
Importan t safet y notes
G WARNING
Windshield washer concentrat e could ignit e if
it come s into contact wit h hot engin e compo- nent s or th e exhaus t system. There is a ris k of
fir e an d injury.
Mak e sur e that no windshield washer con-
centrat e is spilled next to th e filler neck .
! Only use washer fluid that is suitable fo r
plasti c lam p lenses , e.g. MB SummerFit or MB
WinterFit . Unsuitable washer fluid could dam -
age th e plasti c lenses of th e headlamps.
! Only MB SummerFit an d MB WinterFit
washer fluid should be mixed together . The
spray nozzles may otherwise becom e
blocked.
Do no t use distilled or de-ionized water . Other -
wise , th e level sensor may giv e a false reading.
Whe n handlin g washer fluid, observe th e impor -
tant safet y note s on servic e products
( Y
page 323) .
At temperature s abov e freezing:X
Fill th e washer fluid reservoir wit h a mixture of
water an d windshield washer fluid, e.g. MB
SummerFit .
Ad d 1 par t MB SummerFit to 10 0 parts water .
At temperature s below freezing: X
Fill th e washer fluid reservoir wit h a mixture of
water an d washer fluid, e.g. MB WinterFit .
Fo r th e correc t mixin g ratio refe r to th e infor-
mation on th e antifreez e reservoir.
i Ad d windshield washer fluid, e.g. MB Sum -
me rFit or MB WinterFit , to th e washer fluid all
year round.
Climat e contro l syste m refrigerant
Important safety notes The climate control system of your vehicle is fil-
led with refrigerant R ‑ 134a.
The instruction label regarding the refrigerant
type used can be found on the radiator cross
member.
! Only the refrigerant R ‑ 134a and the PAG oil
approved by Mercedes-Benz may be used.
The approved PAG oil may not be mixed with
any other PAG oil that is not approved for
R-134a refrigerant. Otherwise, the climate
control system may be damaged.Service products and filling capacities 327
Technical data Z