2018 MERCEDES-BENZ CLS radiator

Head restraints
Adjusting ........................................ .9 5
Adjusting (electrically) ..................... 95
Adjusting (rear) ................................ 95
Installing/removing (rear) ................ 96
Luxury .............................................. 95
see NECK-PRO head restraints
see NECK-PRO luxury head restraints
Headlamps
Fogging up .................................... .1 08
see Automatic headlamp mode
Heating
see Climate control
High beam flasher ............................ .1 06
High-beam headlamps
Adaptive Highbeam Assist ............. 107
Display message ............................ 212
Switching on/off ........................... 106
Hill start assist .................................. 126
HOLD function
Activating ....................................... 158
Deactivating ................................... 158
Display message ............................ 216
Function/notes ............................ .1 57
Home address
see also Digital Operator's Man-
ual ................................................. .2 36
Hood
Closing .......................................... .2 66
Display message ............................ 224
Important safety notes .................. 265
Opening ......................................... 265
Horn ...................................................... 33
Hydroplaning ..................................... 147
I
Ignition lock
see Key positions
Immobilizer .......................................... 74
Indicator and warning lamps
COLLISION PREVENTION ASSIST
PLUS .............................................. 234
Indicator lamps
see Warning and indicator lamps
Indicators
see Turn signals
Insect protection on the radiator .... 266 Instrument cluster
Overview .......................................... 34
Settings ......................................... 197
Warning and indicator lamps ........... 34
Instrument cluster lighting .............. 198
Interior lighting
Automatic control .......................... 109
Control .......................................... .1 09
Delayed switch-off (on-board
computer) ...................................... 199
Overview ........................................ 108
Reading lamp ................................. 108
Setting the brightness of the
ambient lighting (on-board com-
puter) ............................................. 198
Setting the brightness of the dis-
play/switch (on-board computer) .. 198
Setting the color of the ambient
lighting (on-board computer) ......... 198
iPod ®
see also Digital Operator's Man-
ual ................................................. .2 36
J Jack
Storage location ............................ 277
Using ............................................. 313
Jump starting (engine) ..................... .2 85
K
Key positions
KEYLESS-GO .................................. 123
SmartKey ....................................... 123
KEYLESS-GO
Activating ......................................... 76
Convenience closing feature ............ 89
Deactivation ..................................... 76
Display message ............................ 225
Locking ............................................ 76
Removing the Start/Stop button ... 124
Start/Stop button .......................... 123
Starting the engine ........................ 125
Unlocking ......................................... 76
Kickdown
Driving tips ................................... .1 33
Manual drive program .................... 13712
Index

Warning lamp ................................. 228
Parking lamps
Switching on/off ........................... 106
PARKTRONIC
Deactivating/activating ................. 165
Driving system .............................. .1 63
Function/notes ............................ .1 63
Important safety notes .................. 163
Problem (malfunction) ................... 165
Range of the sensors ..................... 163
Warning display ............................. 164
PASSENGER AIR BAG
Display message ............................ 210
PASSENGER AIR BAG OFF
Indicator lamp .................................. 42
Problems (malfunctions) ................ 210
Pets in the vehicle ............................... 63
Phone book
see also Digital Operator's Man-
ual .................................................. 236
Plastic trim (cleaning instruc-
tions) .................................................. 275
Power washers .................................. 271
Power windows
see Side windows
PRE-SAFE ®
(anticipatory occupant
protection)
Display message ............................ 206
Operation ......................................... 56
PRE-SAFE ®
Brake
Activating/deactivating ................. 196
Display message ............................ 207
Function/notes ................................ 72
Important safety notes .................... 73
Warning lamp ................................. 234
PRE-SAFE ®
PLUS (anticipatory
occupant protection PLUS)
Display message ............................ 207
Operation ......................................... 57
Program selector button .................. 133
Protection against theft
ATA (Anti-Theft Alarm system) ......... 75
Immobilizer ...................................... 74
Protection of the environment
General notes .................................. 25
Pulling away
General notes ................................ 125 Pulling away (automatic transmis-
sion) .................................................... 125
Q QR code
Mercedes-Benz Guide App ................. 1
Rescue card ..................................... 30
Qualified specialist workshop ........... 29
R RACE START (Mercedes-AMG vehi-
cles) .................................................... 158
RACETIMER (on-board computer) .... 201
Radiator cover ................................... 266
Radio
Selecting a station ......................... 193
see separate operating instructions
Radio mode
see also Digital Operator's Man-
ual .................................................. 236
Radio-wave reception/transmis-
sion in the vehicle
Declaration of conformity ................ 28
Reading lamp ..................................... 108
Rear compartment
Setting the air vents ...................... 121
Setting the airflow ......................... 118
Setting the temperature ................ 117
Rear fog lamp
Display message ............................ 212
Rear seat (folding the backrest for-
wards/back) ...................................... 245
Rear seats
Display message ............................ 225
Rear view camera
Cleaning instructions ..................... 274
Display in the multimedia system .. 170
Function/notes ............................. 169
Switching on/off ........................... 170
Rear window blind ............................ 251
Rear window defroster
Problem (malfunction) ................... 120
Switching on/off ........................... 119
Rear-view mirror
Dipping (automatic) ....................... 10216
Index

Windshield wipers
Problem (malfunction) .................. .1 11
Replacing the wiper blades ............ 110
Switching on/off ........................... 109
Winter driving
Important safety notes .................. 294
Slippery road surfaces ................... 147
Snow chains .................................. 294
Winter operation
Radiator cover ............................... 266
Winter tires
M+S tires ....................................... 294
Wiper blades
Cleaning ......................................... 273
Important safety notes .................. 110
Replacing ....................................... 110
Wooden trim (cleaning instruc-
tions) ................................................. .2 75
Workshop
see Qualified specialist workshop
Z ZONE function
Switching on/off ........................... 118 Index 23

Do not tamper with, alter, or use in any non-
approved way.
Any unauthorized modification to this device
could void the user's authority to operate the
equipment.
Radar sensors The Active Blind Spot Assist radar sensors are
integrated into the front and rear bumpers and
behind a cover in the radiator trim. Make sure
that the bumpers and the cover in the radiator
grill are free of dirt, ice or slush. The rear sensors
must not be covered, for example by cycle racks
or overhanging cargo. Following a severe impact
or in the event of damage to the bumpers, have
the function of the radar sensors checked at a
qualified specialist workshop. Active Blind Spot
Assist may otherwise no longer work properly.
Monitoring area
G WARNING
Active Blind Spot Assist does not detect all
traffic situations and road users. There is a
risk of an accident.
Always make sure that there is sufficient dis-
tance on the side for other traffic or obstacles.
At a distance of approximately 1.6 ft (0.5 m) D
from the vehicle, Active Blind Spot Assist mon-
itors the area up to 10 ft (3 m) next to

vehicle are also monitored with the aid of the
radar sensor system. Active Lane Keeping
Assist detects lane markings on the road and
can warn you before you leave your lane unin-
tentionally. If you do not react to the warning, a
lane-correcting application of the brakes can
bring the vehicle back into the original lane.
This function is available in the range between
40 mph and 120 mph (60 km/h and 200 km/h).
For Active Lane Keeping Assist to assist you
when driving, the radar sensor system must be
operational
Important safety notes If you fail to adapt your driving style, Active Lane
Keeping Assist can neither reduce the risk of
accident nor override the laws of physics. Active
Lane Keeping Assist cannot take account of
road and weather conditions. It may not recog-
nize traffic situations. Active Lane Keeping
Assist 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
your lane.
Active Lane Keeping Assist cannot continuously
keep your vehicle in its lane.
G WARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
In such cases, Active Lane Keeping Assist
can: R
give an unnecessary warning and then
make a course-correcting brake application
to the vehicle R
not give a warning or intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and keep within the lane, especially
if Active Lane Keeping Assist alerts you. Ter-
minate the intervention in a non-critical driv-
ing situation.
The system may be impaired or may not function
if: R
there is poor visibility, e.g. due to insufficient
illumination of the road, or due to snow, rain,
fog or spray R
there is glare, e.g. from oncoming traffic, the
sun or reflections (e.g. when the road surface
is wet) R
the windshield is dirty, fogged up, damaged or
covered, for instance by a sticker, in the vicin-
ity of the camera R
the radar sensors in the front or rear bumpers
or the radiator trim are dirty, e.g. obscured by
snow R
there are no, several or unclear lane markings
for a lane, e.g. in areas with road construction
work R
the lane markings are worn away, dark or cov-
ered up, e.g. by dirt or snow R
the distance to the vehicle in front is too small
and the lane markings thus cannot be detec-
ted 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 strong shadows cast on the road
If no vehicle is detected in the adjacent lane and
broken lane markings are detected, no lane-cor-
recting brake application is made.
Warning vibration in the steering wheel A warning may be given if a front wheel passes
over a lane marking. It will warn you by means of
intermittent vibration in the steering wheel for
up to 1.5 seconds.
Lane-correcting brake application
G WARNING
A lane-correcting brake application cannot
always bring the vehicle back into the original
lane. There is a risk of an accident.
Always steer, brake or accelerate yourself,
especially if Active Lane Keeping Assist warns
you or makes a lane-correcting brake appli-
cation.
G WARNING
Active Lane Keeping Assist only detects traf-
fic conditions or road users to a limited
extent. In very rare cases, the system may
make an inappropriate brake application, e.g.
after intentionally driving over a solid lane
marking. There is a risk of an accident.
An inappropriate brake application may be
interrupted at any time if you steer slightly in
the opposite direction. Always make sure thatDriving systems 185
Driving and parking Z

Engine compartment
Hood
Important safety notes
G WARNING
If the hood is unlatched, it may open up when
the vehicle is in motion and block your view.
There is a risk of an accident.
Never unlatch the hood while driving. Before
every trip, ensure that the hood is locked.
G WARNING
When opening and closing the hood, it may
suddenly fall into the closed position. There is
a risk of injury to persons within range of
movement of the hood.
Open and close the hood only when no one is
within its range of movement.
G WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
G WARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There
is a risk of injury.
If you need to do any work inside the engine
compartment: R
switch off the ignition R
never reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area R
remove jewelry and watches R
keep items of clothing and hair, for exam-
ple, away from moving parts
G WARNING
The ignition system and the fuel injection sys-
tem work under high voltage. If you touch
components which are under voltage, you
could get an electric shock. There is a risk of
injury.
Never touch components of the ignition sys-
tem or fuel injection system when the ignition
is switched on.
Opening the hood
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
When the hood is open and the windshield
wipers are set in motion, you can be injured by
the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
! Make sure that the windshield wipers are
not folded away from the windshield. You
could otherwise damage the windshield wip-
ers or the hood.Engine compartment 265
Maintenance and care Z

X
Make sure that the windshield wipers are
turned off. X
Pull release lever C on the hood.
The hood is released.
X
Reach into the gap, pull hood catch handle D
up and lift the hood.
If you lift the hood by approximately 15 in
(40 cm), the hood is opened and held open
automatically by the gas-filled strut.
Closing the hood X
Lower the hood and let it fall from a height of
approximately 8 in (20 cm). X
Check that the hood has engaged properly.
If the hood can be raised slightly, it is not
properly engaged. Open it again and close it
with a little more force.
Radiator
Do not cover up the radiator, such as with a
thermal mat or insect protection cover. The
readings of the on-board-diagnostic system may
otherwise be inaccurate. Some of these read-
ings are required by law and must be accurate at
all times. Engine oil
Important safety notes
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 engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There
is a risk of injury.
If you need to do any work inside the engine
compartment: R
switch off the ignition R
never reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area R
remove jewelry and watches R
keep items of clothing and hair, for exam-
ple, away from moving parts
G WARNING
If engine oil comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Make sure that engine oil is not spilled next to
the filler neck. Let the engine cool down and
thoroughly clean the engine oil off the com-
ponents before starting the engine.
G WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.266
Engine compartment
Maintenance and care

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