key battery MERCEDES-BENZ C-CLASS COUPE 2018 Owner's Manual

Gliding mode ................................. 139
Kickdown ....................................... 139
Manual shifting .............................. 142
Oil temperature (on-board com-
puter, Mercedes-AMG vehicles) ..... 212
Overview ........................................ 136
Permanent setting ......................... 142
Problem (malfunction) ................... 145
Pulling away ................................... 129
Starting the engine ........................ 128
Steering wheel paddle shifters ...... 142
Transmission position display
(DIRECT SELECT lever) ................... 138
Transmission positions .................. 138
Automatic transmission emer-
gency mode ....................................... 145
B
Back button ....................................... 257
Backup lamp
Display message ............................ 228
Bag hook ............................................ 270
BAS (Brake Assist System) ................. 64
Basic settings
see Settings
Battery (SmartKey)
Checking .......................................... 78
Important safety notes .................... 77
Replacing ......................................... 78
Battery (vehicle)
Charging ........................................ 307
Display message ............................ 230
Important safety notes .................. 305
Jump starting ................................. 308
Belt
see Seat belts
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 209
Display message ............................ 234
Notes/function .............................. 186
see Active Blind Spot Assist
Blower
see Climate control
Bluetooth
®
Connecting a different mobile
phone ............................................ 264 Searching for a mobile phone ........ 263
see also Digital Operator's Man-
ual .................................................. 256
Telephony ...................................... 263
Brake
Active Brake Assist with cross-
traffic function ................................. 70
Brake Assist
see BAS (Brake Assist System)
Brake assistance
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 222
Notes ............................................. 347
Brake force distribution
see EBD (electronic brake force
distribution)
Brake linings
Display message ............................ 222
Brakes
ABS .................................................. 64
Adaptive Brake Assist ...................... 66
BAS .................................................. 64
Brake fluid (notes) ......................... 347
Display message ............................ 217
EBD .................................................. 70
High-performance brake system .... 154
Hill start assist ............................... 130
HOLD function ............................... 165
Important safety notes .................. 152
Maintenance .................................. 153
Parking brake ................................ 149
Riding tips ...................................... 152
Warning lamp ................................. 246
Breakdown
Where will I find...? ........................ 299
see Flat tire
see Towing away
Brig htnes
s control (instrument
cluster lighting) ................................... 35
Buttons on the steering wheel ......... 197
C
California
Important notice for retail cus-
tomers and lessees .......................... 28
6Index

SIRIUS servicessee also Digital Operator's Man-
ual .................................................. 256
Sliding sunroof
Important safety notes .................... 90
Problem (malfunction) ..................... 93
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery ....................... 78
Changing the programming .............7 7
Checking the battery ...................... .78
Convenience closing feature ............ 89
Convenience opening feature .......... 88
Dis play message ............................ 243
Door central locking/unlocking ...... .75
Important safety notes .................... 75
KEYLESS-GO start function .............. 77
Loss .................................................7 9
Mechanical key ................................ 77
Overview .......................................... 75
Positions (ignition lock) ................. 126
Problem (malfunction) ..................... 79
Starting the engine ........................ 128
Smartphone
Starting the engine ........................ 129
SMS
see also Digital Operator's Man-
ual .................................................. 256
Snow chains ...................................... 319
Socket (12 V)
Center console .............................. 275
General notes ................................ 274
Rear compartment .........................2 75
Sound
Switching on/off ........................... 257
Special seat belt retractor .................. 59
Specialist workshop ............................ 31
Speed, controlling
see Cruise control
Spe

edometer
Activating/deactivating the addi-
tional speedometer ........................ 211
Digital ............................................ 201
In the Instrument cluster ................. 36
Segments ...................................... 196
Selecting the display unit ...............2 11SPORT handling mode
Deactivating/activating
(Mercedes-AMG vehicles) ................ 68
Warning lamp ................................. 249
Sports exhaust system
AMG ............................................... 132
Standing lamps
Display message ............................ 228
Switching on/off ........................... 109
Start button
Display message ............................ 244
Start/Stop button
Key positions ................................. 127
Starting the engine ........................ 128
Start/stop function
see ECO start/stop function
Starting (engine) ................................ 128
Starting the engine
see Starting (engine)
STEER CONTROL .................................. 73
Steering
Display message ............................ 242
Warning lamps ............................... 255
Steering assistant STEER CON-
TROL
see STEER CONTROL
Steering Pilot
Display message ............................ 237
with Distance Pilot DISTRONIC ...... 163
Steering wheel
Adjusting (electrically) ................... 101
Button overview ............................... 37
Buttons (on-board computer) ......... 197
Cleaning ......................................... 297
EASY ENTRY/EXIT feature ............. 102
Important safety notes .................. 101
Storing settings (memory func-
tion) ............................................... 106
Steering wheel heating
Problem (malfunction) ................... 102
Switching on/off ........................... 101
Steering wheel paddle shifters ........142
Stopwatch (RACETIMER) ................... 214
Stowage areas ................................... 266
Stowage compartments
Armrest (under) .............................2 67
Center console .............................. 267
20Index

Individual settings .......................... 207
Limited Warranty .............................32
Loading .......................................... 326
Locking (in an emergency) ............... 82
Locking (SmartKey) .......................... 75
Lowering ........................................ 340
Maintenance .................................... 29
Operating safety .............................. 30
Operation outside the USA/
Canada ............................................ 29
Parking .......................................... 147
Parking for a long period ................ 150
Pulling away ................................... 129
Raising ........................................... 337
Reporting problems ......................... 31
Securing from rolling away ............ 336
Technical data ............................... 342
Towing away .................................. 310
Transporting .................................. 312
Unlocking (in an emergency) ........... 82
Unlocking (SmartKey) ...................... 75
Vehicle data ................................... 349
Vehicle battery
see Battery (vehicle)
Vehicle data
Roof load (maximum) ..................... 349
Vehicle dimensions ........................... 349
Vehicle emergency locking ................ 82
Vehicle identification number
see VIN
Vehicle identification plate .............. 343
Vehicle level
AIRMATIC ...................................... 168
Display message ............................ 233
Video
Operating the DVD ......................... 205
see also Digital Operator's Man-
ual .................................................. 256
VIN
Seat ............................................... 344
Type plate ...................................... 343
W
Warning and indicator lampsABS ................................................ 247
Active Brake Assist ........................ 253
Airbag ............................................ 250 Brakes ........................................... 246
Coolant .......................................... 251
Distance warning ........................... 253
Engine diagnostics ......................... 250
ESP
®.............................................. 247
ESP®OFF ....................................... 249
Fuel tank ........................................ 250
General notes ................................ 244
Overview .......................................... 36
Parking brake ................................ 250
PASSENGER AIR BAG ...................... 44
Reserve fuel ................................... 250
Restraint system ............................ 250
Seat belt ........................................ 245
SPORT handling mode ................... 249
Steering ......................................... 255
Tire pressure monitor .................... 254
Warranty .............................................. 28
Washer fluid
Display message ............................ 243
Weather display (COMAND)
see also Digital Operator's Man-
ual .................................................. 256
Wheel and tire combinations
Tires ............................................... 340
Wheel bolt tightening torque ........... 340
Wheel chock ...................................... 336
Wheels
Changing a wheel .......................... 335
Checking ........................................ 317
Cleaning ......................................... 294
Important safety notes .................. 316
Information on driving .................... 316
Interchanging/changing ................ 335
Mounting a new wheel ................... 339
Mounting a wheel .......................... 336
Removing a wheel .......................... 339
Snow chains .................................. 319
Storing ........................................... 336
Tightening torque ........................... 340
Wheel size/tire size ....................... 340
Window curtain air bag
Display message ............................ 225
Operation ......................................... 51
Windows
see Side windows
24Index

When driving at a speed under 20 mph
(30 km/h): if you depress the brake pedal,
Active Brake Assist with cross-traffic function is
activated. The increase in brake pressure from
Active Brake Assist with cross-traffic function is
carried out at the last possible moment.
When driving at a speed above 20 mph
(30 km/h): if you depress the brake pedal
sharply, Active Brake Assist with cross-traffic
function automatically increases the brake pres-
sure to a degree suited to the traffic situation.
Active Brake Assist with cross-traffic function
provides braking assistance in hazardous situa-
tions with vehicles in front within a speed range
between 4 mph (7 km/h) and 155 mph
(250 km/h).
Up to a speed of approximately 44 mph
(70 km/h) the Active Brake Assist with cross-
traffic function assists you with braking in haz-
ardous situations with:
Rstationary obstacles in the path of the vehicle,
e.g. stopped or parked vehicles
Rstationary pedestrians in the path of the vehi-
cle
Robstacles crossing your path that move in the detection range of the sensors and are detec-
ted
XKeep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
You can prevent the intervention of Active Brake
Assist with cross-traffic function at any time by:
Rdepressing the accelerator pedal further.
Ractivating kickdown.
Rreleasing the brake pedal
The braking application of Active Brake Assist
with cross-traffic function is ended automati-
cally if:
Ryou maneuver to avoid the obstacle.
Rthere is no longer a risk of collision.
Ran obstacle is no longer detected in front of
your vehicle.
STEER CONTROL
General information
STEER CONTROL helps you by transmitting a
noticeable steering force to the steering wheel
in the direction required for vehicle stabilization. This steering assistance is provided in particular
if:
Rboth right wheels or both left wheels are on a
wet or slippery road surface when you brake
Rthe vehicle begins to skid
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 63).
No steering support is provided from STEER
CONTROL, if:
RESP®is deactivated
RESP®is malfunctioning
Rthe steering is malfunctioning
If ESP®is malfunctioning, you will be assisted
further by the electrical power steering.
Protection against theft
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct SmartKey.
XTo activate with the SmartKey: remove the
SmartKey from the ignition lock.
XTo activate with KEYLESS-GO start-func-
tion or KEYLESS-GO: switch the ignition off
and open the driver's door.
XTo deactivate: switch on the ignition.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Anyone
can start the engine if a valid SmartKey has been
left inside the vehicle.
iThe 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).
Protection against theft73
Safety
Z

multimedia system; see the Digital Operator's
Manual.
You will receive visual and acoustic locking con-
firmation if all components were able to be
locked.
When the locator lighting is activated via the
multimedia system, it lights up when it is dark
after the vehicle is unlocked with the SmartKey;
see the Digital Operator's Manual.
XTo open the trunk lid automatically from
outside the vehicle:press and hold theF
button until the trunk lid opens.
XTo open the trunk lid automatically from
outside the vehicle: if the SmartKey is loca-
ted in the immediate vicinity of the vehicle,
press the Fbutton on the SmartKey.
When the trunk lid closes you can then
release the button.
KEYLESS-GO
General notes
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a Smart-
Key in the vehicle (
Ypage 128).
Locking/unlocking centrally
You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry the
SmartKey with you. You can combine the func-
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
& button on the SmartKey.
The driver's door and the door at which the han-
dle is used, must both be closed. The SmartKey
must be outside the vehicle. When locking or
unlocking with KEYLESS-GO, the distance
between the SmartKey and the corresponding
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:
Rwhen starting the engine
Rwhile driving
Rwhen using HANDS-FREE ACCESS
Rwhen the external door handles are touched
Rduring convenience closing
XTo unlock the vehicle: touch the inner sur-
face of the door handle.
XTo lock the vehicle: touch sensor surface :
or ;.
Make sure that you do not touch the inner
surface of the door handle.
XConvenience closing feature: touch
recessed sensor surface ;for an extended
period.
Further information on the convenience clos-
ing feature (
Ypage 89).
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.
XTo deactivate: press the&button on the
SmartKey twice in rapid succession.
The battery check lamp (
Ypage 78) of the
SmartKey flashes twice briefly and lights up
once, then KEYLESS-GO is deactivated.
XTo activate: press any button on the Smart-
Key.
or
XInsert the SmartKey into the ignition lock.
KEYLESS-GO and all of its associated features
are available again.
76SmartKey
Opening and closing

KEYLESS-GOstart function
Gene ral notes
Bear in min dthat th eengin ecan be started by
any of th evehicl eoccupant sif there is aSmart -
Key in th evehicl e (
Ypage 128).
Changing the settings ofthe locking
system
You can chang eth esetting sof th elocking sys-
tem. This mean sthat only th edriver's door and
th efuel filler flap are unlocke dwhen th evehicl e
is unlocked. This is useful if you frequentl ytravel
alone.
XTo change th esetting: press and hold down
th e% and& buttons simultaneousl y
for approximately six seconds until th ebat -
tery chec klamp (
Ypage 78) flashes twice .
If th esetting of th elocking system is changed
within th esignal range of th evehicle, pressing
th e& or% button:
Rlocks or
Runlocks th evehicl e
The SmartKey no wfunction sas follows :
XTo unlock: press the% buttononce .
XTo unlock centrally: press the% button
twice .
XTo lock: press the& button.
XTo restor eth efactory settings: press and
hold th e% and& buttons simultane -
ousl yfor approximately six seconds until th e
battery chec klamp (
Ypage 78) flashes
twice .
The KEYLESS-GO function scan be changed as
follows :
XTo unlock th edriver's door :touch th einner
surfac eof th edoor handle on th edriver's
door .
XTo unlock centrally: touch theinner surfac e
of th efront-passenger door handle.
XTo lock centrally: touch theouter sensor
surfac eon on eof th edoor handles .
Mechanical key
Gene ral notes
If th evehicl ecan no longer be locke dor
unlocke dwit hth eSmartKey or KEYLESS-GO ,
use th emechanical key.
If you use th emechanical ke yto unloc kand
open th edriver's door ,th eanti-thef talarm sys-
te m will be triggered .Switc hoff th ealarm
(
Ypage 74) .
If you unloc kth evehicl eusin gth emechanical
key, th efuel filler flap will no tbe unlocke dauto -
matically.
XTo unlock th efuel filler flap: insert the
SmartKey int oth eignition lock.
Removing the mechanical key
XPush release catch :in th edirection of th e
arrow and at th esam etime remove mechan -
ical ke y; from th eSmartKey.
Further information on locking/unlocking th e
driver's door (
Ypage 82).
Inserting the mechanical key
XPush mechanical ke y; completely int oth e
SmartKey until it engage sand release
catch :is bac kin it sbasic position .
SmartKey battery
Import ant safety notes
GWARNIN G
Batterie scontain toxic and corrosiv esubstan -
ces. If batterie sare swallowed, it can result in
SmartKey77
Opening and closing
Z

severe health problems. There is a risk of fatalinjury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately.
HEnvironmental note
Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separatelyand recycled to protect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm.
Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work-
shop.
Checking the battery
XPress the &or% button.
The battery is working properly if battery
check lamp :lights up briefly. The battery is discharged if battery check
lamp
:does not light up briefly.
XChange the battery (Ypage 78).
If the SmartKey battery is checked within the
signal reception range of the vehicle, pressing
the & or% button:
Rlocks or
Runlocks the vehicle
iYou can get a battery at any qualified spe-
cialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
XTake the mechanical key out of the SmartKey
(Ypage 77).
XPress mechanical key ;into the SmartKey
opening in the direction of the arrow until bat-
tery compartment cover :opens. Do not
hold battery compartment cover :closed
while doing so.
XRemove battery compartment cover :.
78SmartKey
Opening and closing

XRepeatedly tap theSmartKey against your
palm until battery =falls out .
XInsertth ene wbattery wit hth epositive ter-
minal facing upwards. Use alint-free cloth to
do so.
XMak esur ethat th esurfac eof th ebattery is
free of lint, grease and other contaminants.
XInser tth efron ttab sof battery compartmen t
cover :intoth ehousing first and then press
to close it .
XInsertmechanical ke y; intoth eSmartKey
(Ypage 77).
XChec kth efunction of all SmartKey buttons on
th evehicle.
Problems with the SmartKey
ProblemPossible causes/consequences and MSolutions
You can no longer lockor
unlock th evehicl eusin g
th eSmartKey.The SmartKey battery is discharged or nearly discharged.
XChec kth eSmartKey battery (Ypage 78) and replace it if necessar y
(Ypage 78).
If this does no twork:
XLoc kor unlock th evehicl eusin gth emechanical ke y (Ypage 82).
There is interferenc efrom apowerful source of radi owaves.
XLoc kor unlock th evehicl eusin gth emechanical ke y (Ypage 82).
The SmartKey is faulty.
XLockor unlock th evehicl eusin gth emechanical ke y (Ypage 82).
XHaveth eSmartKey checke dat aqualified specialist workshop.
You can no longer loc kor
unlock th evehicl eusin g
KEYLESS-GO .KEYLESS-GO was deactivated.
XReactivateKEYLESS-GO (Ypage 76).
The SmartKey battery is discharged or nearly discharged.
XCheckth eSmartKey battery (Ypage 78) and replace it if necessar y
(Ypage 78).
If this does no twork:
XLoc kor unlock th evehicl eusin gth emechanical ke y (Ypage 82).
There is interferenc efrom apowerful source of radi owaves.
XLoc kor unlock th evehicl eusin gth emechanical ke y (Ypage 82).
SmartKey79
Opening and closing
Z

ProblemPossible causes/consequences andMSolutions
KEYLESS-GO is malfunctioning.
XLock/unlock the vehicle using the remote control function of the
SmartKey.
XHave 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:
XLock or unlock the vehicle using the mechanical key (Ypage 82).
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
The engine cannot be
started using the Smart-
Key.The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary (Ypage 307).
or
XJump-start the vehicle (Ypage 308).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The Smart-
Key is in the vehicle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 78) and replace it if necessary
(Ypage 78).
If this does not work:
XStart your vehicle with the SmartKey in the ignition lock.
There is interference from a powerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
You have lost a Smart-
Key.XHave the SmartKey deactivated at a qualified specialist workshop.
XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
80SmartKey
Opening and closing

Switching the seat heating on/off
Switching on/off
GWARNING
Repeatedly switching on the seat heating can
cause the seat cushion and backrest pads to
become very hot. The health of persons with
limited temperature sensitivity or a limited
ability to react to high temperatures may be
affected or they may even suffer burn-like
injuries. There is a risk of injury.
Therefore, do not switch the seat heating on
repeatedly.
The three red indicator lamps in the button indi-
cate the heating level you have selected.
The system automatically switches down from
level 3to level 2after approximately eight
minutes.
The system automatically switches down from
level 2to level 1after approximately ten
minutes.
The system automatically switches off approx-
imately 20 minutes after it is set to level 1.
XTurn the SmartKey to position1or2 in the
ignition lock (Ypage 126).
XTo switch on: press button:repeatedly
until the desired heating level is set.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
iIf the battery voltage is too low, the seat
heating may switch off.
iIf drive program Eis selected, the power of
the seat heating is reduced.
Switching the seat ventilation on/off
Switching on/off
The blue indicator lamps in the button indicate
the ventilation level you have selected.
XTurn the SmartKey to position 1or2 in the
ignition lock (Ypage 126).
XTo switch on: press button:repeatedly
until the desired ventilation level is set.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
iIf the battery voltage is too low, the seat
ventilation may switch off.
iYou can open the side windows and the slid-
ing sunroof using the "Convenience opening"
feature (
Ypage 88). The seat ventilation of
the driver's seat automatically switches to the
highest level.
iWhen the vehicle is stationary, the fan
speed can be reduced automatically. This
reduces the noises of the seat ventilation.
100Seats
Seats, steering wheel and mirrors