2015 MERCEDES-BENZ C-CLASS COUPE warning light

note of thi
swhend riving aladen vehicl eand
when towing atrailer.
Thi salsoa pplies if cruis econtrol, DISTRONIC
PLU SorS PEEDTRONIC is activated.
Thi sw illu se the braking effect of the engine, so
less braking will be required to maintain vehicle
speed .Thisr elieves the load on the brake sys-
tem and prevents the brakes from overheating
and wearing too quickly.
Heavy and light loads G
WARNING
The braking system can overheat if yo ulea ve
your foo tonthe brake peda lwhile driving.
Thi sincreases the braking distance and could
eve ncause the braking system to fail. There is
ar iskofana ccident.
Never us ethe brake peda lasafootrest. Do
not simultaneousl ydepress both the brake
peda land the accelerato rpedal whiledriving.
! Depressing the brake peda
lconstantly
results in excessive and premature wear to
the brake pads.
If heavy demands are made on the brakes, do
not park the vehicl eimmediately. Driv eonfor a
short while. Thi sallow sthe airflow to cool the
brakes more quickly.
If the brakes have been used onl ymoderately,
yo us houl doccasionall ytest thei reffectiveness.
To do this, brake more firmly from ahigher
speed whil epayin gattentio ntothe traffic con-
ditions. Thi simprove sthe gri pofthe brakes.
Wet road surfaces If yo
uhaved riven for alon gt ime in heavy rain
withou tbraking ,ther em aybe adelayed reac-
tio nfrom the brakes when braking for the first
time .Thism ayalso occu rafte rac ar wash or
afte rdriving throug hdeepw ater.
Yo uw illh avetod epress the brake peda lmore
firmly .Maintain agreate rdistance to the vehicle
in front.
After driving on awetroa dorh aving the vehicle
washed, brake firmly whil epayin gattentio nto
the traffic conditions. Thi swillw armupt he
brake discs, thereb ydrying them more quickly
and protecting them against corrosion. Limite
dbraking performanc eonsalt-
treate droads If yo
udrive on salt-treate droads, alayer of salt
ma yform on the brake discs and pads. Thi scan
increas ethe braking distance considerably.
R In order to prevent any salt build-up, appl ythe
brakes occasionall ywhile paying attentio nto
the traffic conditions.
R Carefull ydepress the brake peda latthe end
of the journey and when starting the next
journey.
R Maintain amuchg reate rdistance to the vehi-
cle in front.
New brake discs and brake pads/
linings Brake pads/lining
sand discs tha tare either new
or have been replaced achieve optimu mbraking
effect onl yaftersevera lhun dre dkilometres of
driving .Com pensate for the reduce dbraking
effect by applying greate rforce to the brake
pedal.
For safety reasons ,Mercedes-Benz recom-
mend sonlyf itting the following brake discs and
brake pads/linings:
R brake discs tha thaveb eena pproved by
Mercedes-Benz
R brake pads/lining sthath aveb eena pproved
by Mercedes-Benz or tha tare of an equivalent
standard of quality
Othe rbrake discs or brake pads/lining scan
compromise the safety of your vehicle.
Alway sreplace al lbrake discs and brake pads/
lining sonana xleatt he same time .Alway sfit
new brake pads/lining swhenr eplacing brake
discs.
The vehicl eisequippe dwithl ightweight brake
discs to which the whee lassembl ywithr im and
threaded connectio nism atched.
The us eofbrake discs othe rtha nt hose
approved by Mercedes-Benz ma yalter track
width and is subject to approval ,ifapplicable.
Shock-typ eloads when handling the brake
discs, such as when changing wheels ,can lead
to areduction in comfort when driving with light-
weight brake discs. Avoi dshock-typ eloads on
the lightweight brake discs, particularly on the
brake plate. 178
Driving tipsDriving an
dparking

Cruise control lever
:
To store th ecurren tspee dorah igher speed
; LIM indicator lamp
= To store th ecurren tspee dorc alling up the
last store dspeed
? To store th ecurren tspee doral ower speed
A To switch between cruise control and varia-
ble SPEEDTRONIC
B To deactivate cruise control
You can operate cruise control and variable
SPEEDTRONIC wit hthe cruise control lever.
The LIM indicator lamp on th ecruise control
leve rindicates whic hsystem you have selected:
R LIM indicator lam poff:cruise control is
selected
R LIM indicator lam pon:variable SPEED-
TRONIC is selected
When you activat ecruise control, th estored
spee diss hown in th emultifunction display for
fiv es econds. In addition ,the é symbol
appear sinthemultifunction display.
Speedometer with segments: when cruise
control is activated, th esegments from the
store dspee dtot hemaximum permitted speed
light up.
Selecting cruise control X
Chec kwhether LIM indicator lamp ;is off.
If it is off ,cruise control is alread yselected.
If it is not, pres sthe cruise control leve rinthe
direction of arrow A.
LIM indicator lamp ;in th ecruise control
leve rgoes out .Cruis econtrol is selected. Storing and maintaining th
ecurrent
speed You can store th
ecurren tspee dify ou are driv-
ing faster than 30 km/h.
X Accelerat ethe vehicle to th edesired speed.
X Briefl ypres sthe cruise control leve rup:or
down ?.
X Remove your foo tfro mt heaccelerato rpedal.
Cruis econtrol is activated. The vehicle auto-
maticall ymaintain sthe speed.
i Cruis
econtrol may be unable to maintain
th es toreds pee donu phill gradients .The
store dspee disr esumed when th egradient
evens out .Cruis econtrol maintain sthe
store dspee dond ownhill gradients by auto-
maticall ybraking th evehicle.
i Vehicle swithm anual transmission:
R Always driv eatadequate, but no texces-
sive, engin espeeds.
R Change gear in good time.
R If possible, do no tchang ed own several
gear satat ime.
Storing th ecurren tspeed or callin gup
th el ast stored speed G
WARNING
If you call up th estoreds pee dand it is lower
than th ecurren tspeed, th evehicle deceler-
ates. If you do no tkno wt he store dspeed, the
vehicle coul ddecelerate unexpectedly. There
is ar iskofana ccident.
Pay attentio ntotheroad and traffic condi-
tions before calling up th estoreds peed. If you
do no tknowt he store dspeed, store the
desired spee dagain.
X Briefl ypull th ecruise control leve rtow ards
you =.
X Remove your foo tfro mt heaccelerato rpedal.
The first tim ecruise control is activated, it
store sthe curren tspee dorr egulate sthe
spee doft hevehicle to th epreviously stored
speed. Driving systems
181Driving and parking Z

Setting
aspeed Bear in mind that it may take
abrief moment
until the vehicle has accelerated or braked to
the set speed.
X Press the cruise control lever up :for a
higher speed or down ?for alower speed.
X Keep the cruise control lever pressed until the
desired speed is reached.
X Release the cruise control lever.
The new speed is stored.
X To adjust the set speed in
1km/h incre-
ments: briefly press the cruise control lever
up : or down ?to the pressure point.
The last stored speed increases or decreases
in 1k m/h increments.
X To adjust the set speed in 10 km/h incre-
ments: briefly press the cruise control lever
up : or down ?beyond the pressure point.
The last stored speed increases or decreases in 10 km/h increments.
i Cruise control is not deactivated if you
depress the accelerator pedal. If you acceler-
ate to overtake, cruise control adjusts the
vehicle's speed to the last speed stored after
you have finished overtaking.
Deactivating cruise control There are several ways to deactivate cruise con-
trol:
X Briefly press the cruise control lever forwards
B.
or
X Brake.
or
X Briefly move the cruise control lever in the
direction of arrow A.
Variable SPEEDTRONIC is selected. LIM indi-
cator lamp ;in the cruise control lever is on.
Cruise control is automatically deactivated if: R you apply the electric parking brake
R you are driving at less than 30 km/h
R ESP ®
intervenes or you deactivate ESP ®
R while driving avehicle with manual transmis-
sion, you shift into neutral or depress the
clutch pedal for longer than six seconds R
on vehicles with manual transmission, you
shift to agear that is too high, and as aresult
the engine speed is too low
R on vehicles with automatic transmission, you
shift to position Nwhile driving
If cruise control is deactivated, you will hear a
warning tone. You will see the Cruise con‐
Cruise con‐
trol off trol off message in the multifunction display
for approximately five seconds.
i The last speed stored is cleared when you
switch off the engine. SPEEDTRONIC
General notes SPEEDTRONIC brakes automatically so that you
do not exceed the set speed. Change into a
lower gear in good time on long and steep down-
hill gradients. Take particular note of this when
driving aladen vehicle. By doing so, you will
make use of the braking effect of the engine.
This relieves the load on the brake system and
preventst he brakes from overheating and wear-
ing too quickly.
Important safety notes If you fail to adapt your driving style, SPEED-
TRONIC can neither reduce the risk of an acci-
dent nor override the laws of physics. SPEED-
TRONIC cannot take into account road, weather or traffic conditions. SPEEDTRONIC is only an
aid. You are responsible for the distance to the
vehicle in front,f or vehicle speed, for braking in
good time, and for staying in lane.
If there is achange of drivers, advise the new
driver of the speed stored.
You can set avariable or permanent limit speed:
R variable for speed limits, e.g. in built-up areas
R permanent for long-term speed restrictions,
e.g. when driving with winter tyres fitted
(Y page 184)
i The speed indicated in the speedometer
may differ slightly from the limit speed stored. 182
Driving systemsDriving and parking

Variable SPEEDTRONIC
General notes
:
To stor ethe current speed or ahighe rspeed
; LIM indicator lamp
= To stor ethe current speed or calling up the
last stored speed
? To stor ethe current speed or alower speed
A To switch between cruis econtro lor
DISTRONIC PLU Sand variabl eSPEED-
TRONIC
B To deactivate variabl eSPEEDTRONIC
With the cruis econtro llev er, yo ucan operate
cruis econtro lorDISTRONIC PLU Sand variable
SPEEDTRONIC.
The LIM indicator lamp on the cruis econtrol
lever indicates which system yo uhaves elected:
R LIMi ndicator lamp off: cruisecontro lor
DISTRONIC PLU Sisselected
R LIMi ndicator lamp on: variableSPEED-
TRONIC is selected
Yo uc an us ethe cruis econtro llev er to limit the
speed to any speed above 30 km/h whil ethe
engine is running.
Selecting variabl eSPEEDTRONIC
If ther eisac hange of drivers ,adviset he new
driver of the limit speed stored.
X Check whethe rLIM indicator lamp ;is on.
If it is on, variabl eSPEEDTRONIC is already
selected.
If it is not, press the cruis econtro llev er in the
direction of arrow A.
LIM indicator lamp ;in the cruis econtrol
lever is on. Variabl eSPEEDTRONIC is selec-
ted. Storin
gthe current speed
Yo uc an us ethe cruis econtro llev er to limit the
speed to any speed above 30 km/h whil ethe
engine is running.
X Briefly press the cruis econtro llev er up :or
down ?.
The current speed is stored and shown in the
multifunctio ndisplay.
Speedomete rwiths egments: the seg-
ments light up from the start of the scale up to
the stored speed limit.
Storin gthe current speed or calling up the
las tstored speed G
WARNING
If yo ucallupt he stored speed and it is lower
tha nthe current speed ,the vehicl edeceler-
ates. If yo udonot know the stored speed ,the
vehicl ecould decelerate unexpectedly .There
is ar iskofana ccident.
Pa ya ttentio ntothe roa dand traffic condi-
tions before calling up the stored speed .Ifyou
do not know the stored speed ,stor ethe
desired speed again.
X Briefly pull the cruis econtro llev er towards
you =.
Settin gaspeed
X To adjust the se
tspeed in 10 km/h incre-
ments: brieflypress the cruis econtro llev er
up : beyond the pressure point for ahigher
speed ,ordown?for alower speed.
or X Kee pthe cruis econtro llev er presse dbeyond
the pressure point unti lthe desired speed is
set. Press the cruis econtro llev er up :for a
highe rspeed or down ?for alower speed.
X To adjust the se
tspeed in 1km/h incre-
ments: brieflypress the cruis econtro llev er
up : to the pressure point for ahighe rspeed
or down ?for alower speed.
or X Kee pthe cruis econtro llev er presse dtothe
pressure point unti lthe desired speed is set.
Press the cruis econtro llev er up :for a
highe rspeed or down ?for alower speed. Driving systems
183Driving andparking Z

Switching SPEEDTRONIC to passive
If you depress the accelerator pedal beyond the
pressure point (kickdown), SPEEDTRONIC is
switched to passive mode. The SPEEDTRONIC SPEEDTRONIC
suspended
suspended message appears in the multifunc-
tion display.
You can then exceed the stored speed. SPEED-
TRONIC is activated again if you:
R drive slower than the stored speed without
kickdown
R set anew speed or
R call up the last speed stored again
The SPEEDTRONIC suspended SPEEDTRONIC suspended message in the
multifunction display disappears.
Deactivating variable SPEEDTRONIC
It is not possible to deactivate variable SPEED-
TRONIC by braking.
There are several ways to deactivate variable
SPEEDTRONIC:
X Briefly press the cruise control lever forwards
B.
or X Briefly press the cruise control lever in the
direction of arrow A.
LIM indicator lamp ;in the cruise control
lever goes out. Variable SPEEDTRONIC is
deactivated.
Cruise control or DISTRONIC PLUS is selec-
ted.
i The last speed stored is cleared when you
switch off the engine.
Permanent SPEEDTRONIC
You can use the on-board computer to limit the
speed permanently to avalue between
160 km/h(e.g. for driving on winter tyres) and
the maximum speed (Y page 248).
Shortly before the stored speed is reached, it
appears in the multifunction display.
Permanent SPEEDTRONIC remains active, even
if variable SPEEDTRONIC is deactivated.
You cannot exceed the stored limit speed, even if you depress the accelerator pedal beyond the
pressure point (kickdown). DISTRONIC PLUS
General notes DISTRONIC PLUS regulates the speed and auto-
matically helps you maintain the distance to the
vehicle detected in front.V ehicles are detected
with the aid of the radar sensor system.
DISTRONIC PLUS brakes automatically so that
the set speed is not exceeded.
Change into alower gear in good time on long
and steep downhill gradients. Take particular
note of this when driving aladen vehicle. By
doing so, you will make use of the braking effect
of the engine. This relieves the load on the brake
system and preventst he brakes from overheat-
ing and wearing too quickly.
If DISTRONIC PLUS detectst hat there isarisk of
ac ollision, you will be warned visuallya nd
acoustically. Without your intervention,
DISTRONIC PLUS cannot prevent acollision. An
intermittent warning tone will then sound and
the distance warning lamp will light up in the
instrumen tcluster. Brake immediately to
increase the distance to the vehicle driving in
front,ort ake evasive action, provided it is safe
to do so.
DISTRONIC PLUS operates in the range
between 0km/h and 200 km/h.
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
Important safety notes G
WARNING
DISTRONIC PLUS does not react to:
R people or animals
R stationary obstacles on the road, e.g. stop-
ped or parked vehicles
R oncominga nd crossing traffic
As aresult, DISTRONIC PLUS may neither give
warnings nor interveneins uch situations.
There is arisk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. G
WARNING
DISTRONIC PLUS cannot always clearly rec-
ognise other road users and complex traffic
conditions. 184
Driving systemsDriving and parking

Steering Assist and Stop&G
oPilot canno tpro-
vid ea ssistance:
R on very sharp corners
R when towing atrailer
R ifal os soft yre pressure or adefectiv etyre has
bee ndetected and displayed
Pa ya ttention also to the important safety notes
for DISTRONIC PLU S(Ypage 184).
The steering interventions are carrie doutwith a
limite dsteering moment. The system requires
the driver to keep his hands on the steering
wheel and to stee rhimself.
If yo udon ot stee ryoursel forify outake your
hands off the steering wheel for aprolonged
perio doftime,the system will firs talert yo uwith
av isua lwarning .As teering wheel symbol
appears in the multifunction display .Ifyouhave
stil lnot started to stee rand have not taken hold
of the steering wheel afte rfive seconds at the
latest, awarning tone also sounds to remind you
to take control of the vehicle. Steering Assist
and Stop&G oPilot switch to passive mode.
DISTRONIC PLU Sremains active.
Activating Steering Assist and Stop&Go
Pilot X
Press button ;.
Indicato rlamp :lights up .The DTR+: DTR+:
steering assist. on
steering assist. on message appears in
the multifunction display .Steering Assist and
Stop&G oPilot are activated. Information in the multifunctio
ndisplay If Steering Assist and Stop&G
oPilot are activa-
ted bu tnot ready for asteering intervention,
steering wheel symbol :appears in grey. If the
system provides yo uwiths upport by means of
steering interventions, symbol :is shown in
green.
Deactivatin gSteering Assist and Stop&Go
Pilot
X Press button ;.
Indicato rlamp :goe sout.T he DTR+:
DTR+:
steering
steering assist.
assist.off
offmessage appears in
the multifunction display .Steering Assist and
Stop&G oPilot are deactivated.
Whe nDISTRONIC PLU Sisdeactivated or not
available ,Steering Assist and Stop&G oPilot are
deactivated automatically. HOL
Dfunction
General notes The HOLD function can assis
tthe driver in the
following situations:
R when pulling away ,especially on stee pslopes
R when manoeuvring on stee pslopes
R when waiting in traffic
The vehicl eiskept stationary withou tthe driver
having to depress the brake pedal.
The braking effect is cancelled and the HOLD
function is deactivated when yo udepress the
accelerato rpedal to pull away. 192
Drivin
gsystemsDriving and parking

Minimum distance
Centre Approx. 20 cm
Corners Approx. 15 cm
If there is an obstacle within this range, the rel-
evant warning displaysl ight up andawarning
tone sounds. If the distance falls below the min- imum, the distance may no longer be shown.
Warning displays :
Segmentsont he left-hand side of the vehi-
cle
; Segmentsont he right-hand side of the vehi-
cle
= Segmentss howing operational readiness
The warning displayss how the distance
between the sensors and the obstacle. The
warning display for the front area is in the instru- ment cluster. The warning display for the rear
area is located on the roof lining in the rear
compartment.
The warning display for each side of the vehicle
is divided into five yellow and two red segments.
PARKTRONIC is operational if operational read-
iness indicator =lights up.
The gear lever position or the transmission posi- tion of the automatic transmission and the
direction in which the vehicle is rolling deter-
mine which warning display is active when the
engine is running. Manual transmission: Gear lever position Warning display
Forward gear
or
Neutral
Front area activated
Reverse gear
Rear and front areas
activated
Automatic transmission:
Transmission posi-
tion Warning display
D
Front area activated
R,
Nor the vehicle is
rolling backwards Rear and front areas
activated
P
No areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the vehi-
cle's distance from the obstacle.
From the:
R sixth segment onwards, you will hear an inter-
mittentw arning tone for approximately two
seconds.
R seventh segment onwards, you will hear a
warning tone for approximately two seconds.
This indicates that you have now reached the minimum distance. Driving systems
199Driving and parking Z

Problems with PARKTRONIC
Problem
Possible causes/consequences and
M
MSolutions Only the red segments in
the PARKTRONIC warn-
ing displaysa re lit. You
also hear awarning tone
for approximately two
seconds.
PARKTRONIC is then
deactivated and the indi-
cator lamp on the
PARKTRONIC button
lights up. PARKTRONIC has malfunctioned and has been deactivated.
X If problems persist, have PARKTRONIC checked at aqualified spe-
cialist workshop. Only the red segments in
the PARKTRONIC warn-
ing displaysa re lit.
PARKTRONIC is then
deactivated. The PARKTRONIC sensors are dirty or there is interference.
X
Clean the PARKTRONIC sensors (Y page 330).
X Switch the ignition back on. The problem may be caused by an external source of radio or ultra-
sound waves.
X See if PARKTRONIC functions in adifferent location. Active Parking Assist
General notes Active Parking Assist is an electronic parking aid
with ultrasound. It measures the road on both
sides of the vehicle. Aparking symbol indicates
as uitable parking space. Active steering inter-
vention and brake application can assist you
during parking and when exiting aparking
space. You may also use PARKTRONIC
(Y page 197).
Important safety notes Active Parking Assist is only an aid. It is not a
substitute for your attention to the immediate
surroundings. The responsibility for safe
manoeuvring and parking remains with you.
Make sure that no persons, animals or objects
are in the manoeuvring range.
When PARKTRONIC is deactivated, Active Park-
ing Assist is also unavailable.
For vehicles with the trailer tow hitch folded out,
the minimum length for parking spaces is
slightly longer.
If you have attached atrailer to your vehicle, you
should not use Active Parking Assist. Once the
electrical connection is established between your vehicle and the trailer, Active Parking
Assist is no longer available. PARKTRONIC is
deactivated for the rear area. G
WARNING
While parking or pulling out of aparking
space, the vehicle swings out and can drive
onto areas of the oncomingl ane. This could
cause you to collide with other road users.
There is arisk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Active Park- ing Assist parking procedure.
! If unavoidable, you should drive over obsta-
cles such as kerbs slowly and not at asharp
angle. Otherwise, you may damage the
wheels or tyres.
Active Parking Assist may also display spaces
not suitable for parking, e.g.: R parking or stopping restrictions
R in front of driveways or entrances and exits
R unsuitable surfaces Driving systems
201Driving and parking Z