2018 MERCEDES-BENZ CLS keyless

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

EEASY-ENTRY feature
Activating/deactivating ................ .1 99
Function/notes ............................ .1 00
EASY-EXIT feature
Crash-responsive ........................... 100
Function/notes ............................ .1 00
Switching on/off ........................... 199
EASY-PACK trunk box ....................... 246
EBD (electronic brake force distri-
bution)
Display message ............................ 205
Function/notes ................................ 72
ECO display
Function/notes ............................ .1 44
On-board computer ....................... 191
ECO start/stop function
Automatic engine start .................. 127
Automatic engine switch-off .......... 126
Deactivating/activating ................. 127
General information ....................... 126
Important safety notes .................. 126
Introduction ................................... 126
Electronic Stability Program
see ESP ®
(Electronic Stability Program)
Emergency
Automatic measures after an acci-
dent ................................................. 58
Emergency release
Driver's door ................................... .8 3
Fuel filler flap ................................. 140
Trunk ............................................... 86
Vehicle ............................................. 83
Emergency spare wheel
General notes ................................ 318
Important safety notes .................. 317
Removing ....................................... 318
Storage location ............................ 318
Stowing .......................................... 319
Technical data ............................... 318
Emergency Tensioning Devices
Activation ......................................... 53
Emissions control
Service and warranty information .... 26
Engine
Check Engine warning lamp ........... 232
Display message ............................ 213 ECO start/stop function ................ 126
Engine number ............................... 323
Irregular running ............................ 128
Jump-starting ................................. 285
Starting problems .......................... 128
Starting the engine with the
SmartKey ....................................... 125
Starting with KEYLESS-GO ............. 125
Switching off .................................. 141
Tow-starting (vehicle) ..................... 290
Engi ne electronics
P roblem (malfunction) ................... 128
Engine jump starting
see Jump starting (engine)
Engine oil
Adding ........................................... 267
Additives ........................................ 326
Checking the oil level ..................... 267
Checking the oil level using the
dipstick .......................................... 267
Display message ............................ 214
Filling capacity ............................... 326
Notes about oil grades ................... 325
Notes on oil level/consumption .... 267
Temperature (on-board computer,
Mercedes-AMG vehicles) ............... 201
Entering an address
see also Digital Operator's Man-
ual .................................................. 236
ESP ®
(Electronic Stability Pro-
gram)
AMG menu (on-board computer) ... 201
Characteristics ................................. 70
Deactivating/activating (button
in Mercedes-AMG vehicles) ............. 71
Deactivating/activating (except
Mercedes ‑ AMG vehicles) ................. 70
Deactivating/activating (on-
board computer, except
Mercedes-AMG vehicles) ............... 195
Display message ............................ 204
Function/notes ................................ 69
General notes .................................. 69
Important safety information ........... 69
Trailer stabilization ........................... 72
Warning lamp ................................. 229
ETS/4ETS (Electronic Traction Sys-
tem) ...................................................... 6910
Index

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

Panic alarm X
To arm: press 3 button C for approx-
imately one second.
A visual and audible alarm is triggered if the
alarm system is armed. X
To disarm: press 3 button C again.
or X
Insert the SmartKey into the ignition lock.
or, on vehicles with KEYLESS ‑ GO:X
Press the Start/Stop button.
The SmartKey must be in the vehicle.
Occupant safety
Introduction to the restraint system The restraint system can reduce the risk of vehi-
cle occupants coming into contact with parts of
the vehicle's interior in the event of an accident.
The restraint system can also reduce the forces
to which vehicle occupants are subjected during
an accident.
The restraint system comprises: R
seat belt system R
air bags R
child restraint system R
child seat securing systems
The components of the restraint system work in
conjunction with each other. They can only
deploy their protective function if, at all times, all
vehicle occupants: R
have fastened their seat belts correctly
( Y
page 44) R
have adjusted their seat and head restraint
properly ( Y
page 93). As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the correct
driver's seat position ( Y
page 93).
You also have to make sure that an air bag can
inflate properly if deployed ( Y
page 46).
An air bag supplements a correctly worn seat
belt. As an additional safety device, the air bag
increases the level of protection for vehicle
occupants in the event of an accident. For exam-
ple, if, in the event of an accident, the protection
offered by the seat belt is sufficient, the air bags
are not deployed. When an accident occurs, only
the air bags that increase protection in that par-
ticular accident situation are deployed. How-
ever, seat belts and air bags generally do not
protect against objects penetrating the vehicle
from the outside.
Information on restraint system operation can
be found under "Triggering of the Emergency
Tensioning Devices and air bags" ( Y
page 53).
For information on children traveling with you in
the vehicle and on child restraint systems, see
"Children in the vehicle" ( Y
page 58).
Important safety notes
G WARNING
Modifications to the restraint system may
cause it to no longer work as intended. The
restraint system may then not perform its
intended protective function and may fail in an
accident or trigger unexpectedly, for example.
This poses an increased risk of injury or even
fatal injury.
Never modify parts of the restraint system.
Never tamper with the wiring, the electronic
components or their software.
If it is necessary to modify components of the
restraint system to accommodate a person
with disabilities, contact an authorized
Mercedes-Benz Center for details. USA only:
for further information contact our Customer
Assistance Center at 1-800-FOR-MERCedes
(1 ‑ 800 ‑ 367 ‑ 6372).
Mercedes-Benz recommends that you only use
driving aids which have been approved specifi-
cally for your vehicle by Mercedes-Benz.Occupant safety 41
Safety Z

PASSENGER AIR BAG OFF indicator lamp C
shows you whether the front-passenger front air
bag is deactivated. X
Turn the SmartKey to position 1 or 2 in the
ignition lock or on vehicles with KEYLESS-GO,
press the Start/Stop button once or twice.
The system carries out self-diagnostics.
The PASSENGER AIR BAG OFF indicator lamp
must light up for approximately six seconds.
The PASSENGER AIR BAG OFF indicator lamp
then displays the status of the front-passenger
front air bag. If the status of the front-passenger
front air bag changes while the vehicle is in
motion, an air bag display message may appear
in the instrument cluster ( Y
page 210). When
the front-passenger seat is occupied, always
pay attention to the PASSENGER AIR BAG OFF
indicator lamp. Be aware of the status of the
front-passenger front air bag both before and
during the journey.
If the PASSENGER AIR BAG OFF indicator
lamp: R
is lit : the front-passenger front air bag is
deactivated. It will then not be deployed in the
event of an accident. R
is not lit : the front-passenger front air bag is
enabled. If, in the event of an accident, all
deployment criteria are met, the front-
passenger front air bag is deployed.
G WARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenger front air bag is
disabled. It will not be deployed in the event of
an accident and cannot perform its intended
protective function. A person in the front-
passenger seat could then, for example, come
into contact with the vehicle's interior, espe-
cially if the person is sitting too close to the
dashboard. This poses an increased risk of
injury or even fatal injury.
When the front-passenger seat is occupied,
always ensure that: R
the classification of the person in the front-
passenger seat is correct and the front-
passenger front air bag is enabled or disa- bled in accordance with the person in the
front-passenger seat R
the front-passenger seat has been moved
back as far back as possible. R
the person is seated correctly.
Make sure, both before and during the jour-
ney, that the status of the front-passenger
front air bag is correct.
G WARNING
If you secure a child in a child restraint system
on the front-passenger seat and the
PASSENGER AIR BAG OFF indicator lamp is
off, the front-passenger front air bag can
deploy in the event of an accident. The child
could be struck by the air bag. This poses an
increased risk of injury or even fatal injury.
Make sure that the front-passenger front air
bag has been disabled. The PASSENGER AIR
BAG OFF indicator lamp must be lit.
G WARNING
If you secure a child in a forward-facing child
restraint system on the front-passenger seat
and you position the front-passenger seat too
close to the dashboard, the child could, in the
event of an accident: R
come into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example R
be struck by the air bag if the PASSENGER
AIR BAG OFF indicator lamp is off
This poses an increased risk of injury or even
fatal injury.
Move the front-passenger seat as far back as
possible. Always make sure that the shoulder
belt strap is correctly routed from the vehicle
belt sash guide to the shoulder belt guide on
the child restraint system. The shoulder belt
strap must be routed forwards and down-
wards from the vehicle belt sash guide. If nec-
essary, adjust the vehicle belt sash guide and
the front-passenger seat accordingly. Always
observe the child restraint system manufac-
turer's installation instructions.50
Occupant safety
Safety

i The immobilizer is always deactivated when
you start the engine.
In the event that the engine cannot be started
(yet the vehicle's battery is charged), the sys-
tem is not operational. Contact an authorized
Mercedes-Benz Center or call
1-800-FOR-MERCedes (in the USA) or
1-800-387-0100 (in Canada).
ATA (anti-theft alarm system) X
To arm: lock the vehicle with the SmartKey or
KEYLESS-GO.
Indicator lamp C flashes. The alarm system
is armed after approximately 15 seconds. X
To disarm: unlock the vehicle with the Smart-
Key or KEYLESS-GO.
or X
Insert the SmartKey into the ignition lock.
or X
Vehicles with KEYLESS-GO: press the
Start/Stop button.
The SmartKey must be in the vehicle.
A visual and audible alarm is triggered if the
alarm system is armed and you open: R
a door R
the vehicle with the mechanical key R
the trunk lid R
the hood X
To stop the alarm with the SmartKey:
press the 6 or 7 button on the Smart-
Key.
The alarm is stopped.
or X
Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
( Y
page 124). X
Insert the SmartKey into the ignition lock.
The alarm is stopped. X
To stop the alarm using KEYLESS-GO:
grasp the outside door handle. The SmartKey
must be outside the vehicle.
The alarm is stopped.
or X
Press the Start/Stop button on the dash-
board. The SmartKey must be inside the vehi-
cle.
The alarm is stopped.
The alarm is not switched off, even if you close
the open door that triggered it, for example.
i If the alarm continues for more than
30 seconds, the mbrace emergency call sys-
tem automatically notifies the Customer
Assistance Center. This is done either by text
message or data connection.
The emergency call system sends the mes-
sage or data provided that: R
you have subscribed to the mbrace service. R
the mbrace service has been activated
properly. R
the necessary mobile phone network is
available.Protection against theft 75
Safety Z

tions of KEYLESS-GO with those of a conven-
tional SmartKey. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using the
7 button on the SmartKey.
When locking or unlocking with KEYLESS-GO,
the distance between the SmartKey and the cor-
responding door handle must not be greater
than 3 ft (1 m).
A brief radio connection between the vehicle
and the SmartKey determines whether a valid
SmartKey is in, or in the direct vicinity of, the
vehicle. This occurs, for example: R
when the external door handles are touched R
when starting the engine R
while the vehicle is in motion
X
To unlock the vehicle: touch the inner sur-
face of the door handle. X
To lock the vehicle: touch sensor sur-
face C .X
Convenience closing feature: touch
recessed sensor surface D for an extended
period.
Further information on the convenience clos-
ing feature ( Y
page 88).X
To unlock the trunk lid: pull the handle on
the trunk lid.
The vehicle only unlocks the trunk lid.
Deactivating and activating If you do not intend to use a SmartKey for an
extended period of time, you can deactivate the
KEYLESS-GO function of the SmartKey. The
SmartKey will then use very little power, thereby
conserving battery power. For the purposes of
activation/deactivation, the vehicle must not be
nearby. X
To deactivate: press the 7 button on the
SmartKey twice in rapid succession.
The battery check lamp of the SmartKey
( Y
page 79) flashes twice briefly and lights
up once, then KEYLESS-GO is deactivated. X
To activate: press any button on the Smart-
Key.
or X
Insert the SmartKey into the ignition lock.
KEYLESS-GO and all of its associated features
are available again.
Changing the settings of the locking
system You can change the settings of the locking sys-
tem. This means that only the driver's door and
the fuel filler flap are unlocked when the vehicle
is unlocked. This is useful if you frequently travel
alone. X
To change the setting: press and hold down
the 6 and 7 buttons simultaneously
for approximately six seconds until the bat-
tery check lamp ( Y
page 79) flashes twice.
If the setting of the locking system is changed
within the signal range of the vehicle, pressing
the 7 or 6 button: R
locks or R
unlocks the vehicle
The SmartKey now functions as follows: X
To unlock: press the 6 button once.X
To unlock centrally: press the 6 button
twice. X
To lock centrally: press the 7 button.
The KEYLESS-GO function is changed as fol-
lows: X
To unlock the driver's door: touch the inner
surface of the door handle on the driver's
door. X
To unlock centrally: touch the inner surface
of the door handle on the front-passenger
door or the rear door. X
To lock centrally: touch the outer sensor
surface on one of the door handles. X
To restore the factory settings: press and
hold the 6 and 7 buttons simultane-
ou
sly fo r approximately six seconds until theSmartKey 77
Opening and closing Z

Problems with the SmartKey Problem
Possible causes/consequences and P Solutions
You can no longer lock or
unlock the vehicle using
the SmartKey. The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 79) and replace it if necessary
( Y
page 79).
If this does not work: X
Unlock ( Y
page 83) or lock ( Y
page 83) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves. X
Unlock ( Y
page 83) or lock ( Y
page 83) the vehicle using the
mechanical key.
The SmartKey is faulty. X
Unlock ( Y
page 83) or lock ( Y
page 83) the vehicle using the
mechanical key. X
Have the SmartKey checked at a qualified specialist workshop.
You can no longer lock or
unlock the vehicle using
KEYLESS-GO. KEYLESS-GO was deactivated. X
Reactivate KEYLESS-GO ( Y
page 76).
The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 79) and replace it if necessary
( Y
page 79).
If this does not work: X
Unlock ( Y
page 83) or lock ( Y
page 83) the vehicle using the
mechanical key.
There is interference from a powerful source of radio waves. X
Unlock ( Y
page 83) or lock ( Y
page 83) the vehicle using the
mechanical key.
KEYLESS-GO is malfunctioning. X
Lock/unlock the vehicle using the remote control function of the
SmartKey. X
Have the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function: X
Unlock ( Y
page 83) or lock ( Y
page 83) the vehicle using the
mechanical key. X
Have the vehicle and SmartKey checked at a qualified specialist
workshop.80
SmartKey
Opening and closing