2016 MERCEDES-BENZ CLS cooling

1, 2, 3 ... 4ETS (Electronic Traction System)
see ETS/4ETS (Electronic Trac-
tion System)
4MATIC (permanent all-wheel
drive)
Function/notes ............................ .1 69
12 V socket
see Sockets
360° camera
Cleaning ......................................... 283
Display in the multimedia system .. 183
Function/notes ............................ .1 81
A ABS (Anti-lock Braking System)
Display message ............................ 213
Function/notes ................................ 64
Important safety notes .................... 64
Warning lamp ................................. 238
Accident
Automatic measures after an acci-
dent ................................................. 58
Activating media mode
General notes ................................ 250
Activating/deactivating cooling
with air dehumidification ................. 120
Active Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 205
Display message ............................ 226
Function/information .................... 190
Active Driving Assistance package .. 190
Active Lane Keeping Assist
Activating/deactivating (on-
board computer) ............................ 205
Display message ............................ 226
Function/information .................... 193
Active multicontour seat
Adjusting (on the seat) ..................... 98
Active Parking Assist
Detecting parking spaces .............. 174
Display message ............................ 227
Exiting a parking space .................. 176
Function/notes ............................. 173
Important safety notes .................. 173 Parking .......................................... 175
ADAPTIVE BRAKE ................................. 72
Adaptive Brake Assist
Function/notes ................................ 68
Adaptive Damping System (ADS) ..... 167
Adaptive Highbeam Assist
Display message ............................ 221
Function/notes ............................. 109
Switching on/off ........................... 110
Additives (engine oil) ........................ 334
Address book
see also Digital Operator's Man-
ual .................................................. 245
Adjusting the volume
Audio 20 ........................................ 246
COMAND ....................................... 246
Air bags
Deployment ..................................... 53
Display message ............................ 219
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 .......................... 48
Window curtain air bag .................... 49
AIR FLOW ........................................... 121
Air vents
Glove box ....................................... 125
Important safety notes .................. 125
Setting ........................................... 125
Setting the side air vents ............... 125
Air-conditioning system
see Climate control
AIRMATIC
Display message ............................ 224
Function/notes ............................. 166
Alarm
ATA (Anti-Theft Alarm system) ......... 75
Switching off (ATA) .......................... 75
Switching the function on/off
(ATA) ................................................ 75 Index 3

Cargo tie down rings ........................ .2 55
CD
see also Digital Operator's Man-
ual ................................................. .2 45
CD player (on-board computer) ....... .2 01
Center console
Lower section .................................. 37
Lower section (AMG vehicles) .......... 38
Upper section .................................. 36
Central locking
Automatic locking (on-board com-
puter) ............................................. 207
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 ............ 62
Rearward-facing restraint system .... 62
Top Tether ...................................... .6 1
Child-proof locks
Important safety notes .................... 62
Rear doors ...................................... .6 3
Children
Special seat belt retractor .............. .5 9
Cigarette lighter ................................ 261
Cleaning
Mirror turn signal .......................... .2 82
Climate control
Automatic climate control (3-
zone) .............................................. 117
Controlling automatically .............. .1 20
Cooling with air dehumidification .. 120
Defrosting the windows ................. 122
Defrosting the windshield ....... ....... 122
Du a
l-zone automatic climate con-
trol ................................................. 115
General notes ................................ 114
Indicator lamp ................................ 120
Information about using auto-
matic climate control ..................... 118
Maximum cooling .......................... 122
Overview of systems ..................... .1 14
Problem with the rear window
defroster ........................................ 124 Problems with cooling with air
dehumidification ............................ 120
Rear control panel ......................... 117
Refrigerant ..................................... 335
Refrigerant filling capacity ............. 336
Setting the air distribution ............. 121
Setting the air vents ..................... .1 25
Setting the airflow ......................... 122
Setting the climate mode (AIR
FLOW) ............................................ 121
Setting the temperature ................ 121
Setting the temperature with 3-
zone automatic climate control ..... 121
Setting the temperature with dual-
zone automatic climate control ..... 121
Switching air-recirculation mode
on/off ............................................ 124
Switching on/off ........................... 119
Switching residual heat on/off ...... 124
Switching the rear window
defroster on/off ............................ 123
Switching the ZONE function on/
off ................................................. .1 22
Cockpit
Overview .......................................... 33
see Instrument cluster
Collapsible spare wheel
Inflating ......................................... 327
see Emergency spare wheel
COLLISION PREVENTION ASSIST
PLUS
Activating/deactivating ................. 204
Display message ............................ 215
Operation/notes .............................. 67
COMAND
Switching on/off ........................... 246
COMAND display
Cleaning ......................................... 283
Combination switch .......................... 108
Connecting a USB device
see also Digital Operator's Ma n-
u
al ................................................. .2 45
Consumption statistics (on-board
computer) .......................................... 199
Controller .......................................... .2 46
Convenience box ............................... 255
Convenience closing feature .............. 886
Index

Convenience opening feature ............ 88
Coolant (engine)
Checking the level ........................ .2 76
Display message ............................ 222
Filling capacity ............................... 335
Important safety notes .................. 334
Temperature (on-board computer,
Mercedes-AMG vehicles) .............. .2 09
Temperature gauge ........................ 196
Warning lamp ................................. 241
Cooling
see Climate control
Copyright ............................................. 32
Cornering light function
Display message ............................ 221
Function/notes ............................ .1 09
Cruise control
Activation conditions ..................... 154
Cruise control lever ....................... 153
Deactivating ................................... 155
Display message ............................ 229
Driving system ............................... 153
Function/notes ............................ .1 53
Important safety notes .................. 153
Setting a speed .............................. 154
Storing and maintaining current
speed ............................................. 154
Cup holder
Center console .............................. 258
Center console in the rear com-
partment ........................................ 258
Important safety notes .................. 257
Rear compartment ......................... 258
Customer Assistance Center
(CAC) ..................................................... 29
Customer Relations Department ....... 29
D
Dashboard
see Instrument cluster
Data
see Technical data
Data carrier
Selecting ........................................ 201
Daytime running lamps
Display message ............................ 221
Function/notes ............................ .1 07 Switching on/off (on-board com-
puter) ............................................. 206
Declarations of conformity ................. 28
Delayed switch-off
Exterior lighting (on-board com-
puter) ............................................. 207
Interior lighting .............................. 207
Diagnostics connection ..................... .2 9
Digital Operator's Manua l
Help ................................................ .2 3
Introduction .................................... .2 3
Digital speedomete r ........................ .1 99
DIRECT SELECT lever
Automatic transmission ................. 135
Display messages
ASSYST PLUS ................................ 277
Calling up (on-board computer) ..... 212
Driving systems ............................ .2 24
Engine ............................................ 222
General notes ................................ 212
Hiding (on-board computer) ........... 212
KEYLESS-GO .................................. 234
Lights ............................................. 221
Safety systems .............................. 213
SmartKey ....................................... 234
Tires ............................................... 230
Vehicle .......................................... .2 32
Distance recorder ............................ .1 98
Distance warning (warning lamp) .... 243
Distance warning function
Function/notes ................................ 67
DISTRONIC PLUS
Activating ....................................... 157
Activation conditions ..................... 157
Deactivating ................................... 161
Display message ............................ 227
Displays in the multifunction dis-
play ................................................ 160
Function/note s ............................. 155
Imp o rtant safety notes .................. 156
Setting the specified minimum
distance ......................................... 159
Stopping ........................................ 159
Doors
Automatic locking (on-board com-
puter) ............................................. 207
Automatic locking (switch) ............... 82 Index 7

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 124).
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.114
Overview of climate control systems
Climate control

Switching cooling with air dehumidification on/off
General notes If you deactivate the "Cooling with air-dehumidification" function, the air inside the vehicle will not
be cooled. The air inside the vehicle will also not be dehumidified. The windows can fog up more
quickly. Therefore, deactivate the cooling with air-dehumidification function only briefly.
The "Cooling with air dehumidification" function is only available when the engine is running. The air
inside the vehicle is cooled and dehumidified according to the temperature selected.
Condensation may drip from the underside of the vehicle when it is in cooling mode. This is normal
and not a sign that there is a malfunction.
Switching on/off X
To activate: press the Z button.
The indicator lamp in the Z button lights up.X
To deactivate: press the Z button.
The indicator lamp in the Z button goes out. The "Cooling with air dehumidification" function
has a delayed switch-off feature.
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 127). X
Set the desired temperature. X
To activate: press the X button.
The indicator lamp in the X button lights
up. Automatic air distribution and airflow are
activated.
i 3-zone automatic climate control: when
automatic mode is activated, you can set the
climate mode ( Y
page 121).X
To switch to manual mode: 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 or deactivating X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 127).X
To activate: press the r button.
The indicator lamp in the r button lights
up.
i Dual-zone automatic climate control: air-
recirculation mode is automatically activated
at high outside temperatures.
3-zone automatic climate control: air-recircu-
lation mode is automatically activated at high
levels of pollution or at high outside temper-
atures.
When air-recirculation mode is activated
automatically, the indicator lamp above the
r button does not light up. Outside air is
added after about 30 minutes. X
To deactivate: press the r button.
The indicator lamp in the r button goes
out. i Air-recirculation mode deactivates auto-
matically: 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
dual-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 127).X
To activate: press the K button.
The indicator lamp in the K button lights
up.
i If the residual heat function is activated, the
windows may fog up on the inside.
i The blower will run at a low speed regardless
of the airflow setting.124
Operating the climate control systems
Climate control

Adding engine oil
G WARNIN G
Certain component s in th e engin e compart-
ment, suc h as th e engine, radiato r and part s
of th e exhaust system, can become ver y hot .
Working in th e engin e compartmen t poses a
ris k of injury.
Wher e possible, let th e engin e cool down and
touch only th e component s described in th e
following.
G WARNIN G
If engin e oil comes int o contact wit h hot com-
ponents in th e engin e compartment, it may
ignite. There is a ris k of fir e and injury.
Mak e sur e that engin e oil is no t spilled next to
th e filler neck . Let th e engin e cool down and
thoroughly clean th e engin e oil off th e com-
ponents before starting th e engine.
H Environmenta l not e
When addin g oil, tak e car e no t to spil l any. If
oil enters th e soil or waterways, it is harmful to
th e environment.
! Only use engin e oils and oil filters that hav e
been approve d for vehicles wit h a servic e sys-
tem. You can obtain a list of th e engin e oils
and oil filters tested and approve d in accord -
anc e wit h th e Mercedes-Benz Specification s
for Service Products at any Mercedes-Benz
Service center.
Damage to th e engin e or exhaust system is
caused by th e following:R
usin g engin e oils and oil filters that hav e no t
been specifically approve d for th e servic e
system R
replacing engin e oil and oil filters after th e
interval for replacemen t specifie d by th e
servic e system has been exceededR
usin g engin e oil additives.
! Do no t add to o muc h oil. addin g to o muc h
engin e oil can result in damag e to th e engin e
or to th e catalytic converter. Hav e excess
engin e oil siphoned off . Exampl e X
Turn cap C counter-clockwise and remove it .X
Ad d engin e oil.
If th e oil level is at or belo w th e MIN mar k on
th e oil dipstick , add 1. 1 US qt (1.0 l) of engine
oil. X
Replace cap C on the filler neck and turn
clockwise.
Ensure that the cap locks into place securely. X
Check the oil level again with the oil dipstick
( Y
page 275).
Further information on engine oil ( Y
page 333).
Additional service products
Checking coolant level
G WARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
G WARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.276
Engine compartment
Maintenance and care

Filling capacities The followin g value s refer to an oil chang e
includin g th e oil filter.
Model Capacit y
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 331).
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 precautions
for service products when handling coolant
( Y
page 331).
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the fol-
lowing tasks: R
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 †).334
Service products and filling capacities
Technical data