light MERCEDES-BENZ C-CLASS CABRIOLET 2018 Repair Manual

Fu
nction of BAS (Brake Assist Sy stem) 000A
WARNING Risk of an accident caused by
a malfunction in BAS (Brake Assi stSys‐
te m)
If BA S is malfunctioning, the braking dis tance
in an emergency braking situation is
increased. 0007
Dep ress the brake pedal with full force
in emer gency braking situations. ABS
pr eve nts the wheels from locking. BA
S suppo rts yo ur eme rgency braking situation
with additional brake forc e.
If yo u depress the brake pedal quickl y,BA S is
acti vated:
R BAS au tomatical lyboosts the brake pres‐
sure.
R BAS can sho rten the braking dis tance.
R ABS pr events the wheels from locking.
The brakes will function as usual once you
re lease the brake pedal. BAS is deactivated. Fu
nction of ESP ®
(Electronic Stability Pro‐
gr am) 000A
WARNING Risk of skidding if ESP ®
is
malfunctioning
If ESP ®
is malfunctioning, ESP ®
cannot car ry
out vehicle stabilisation. In addition, other
driving saf ety sy stems are switched off. 0007
Drive on carefull y. 0007
Have ESP ®
ch ecked at a qualified spe‐
cialist workshop. 000A
WARNING Risk of skidding if ESP ®
is
deactivated
If yo u deactivate ESP ®
, ESP ®
cannot car ry
out vehicle stabilisation. 0007
ESP ®
should on lybe deactivated in the
fo llowing situations. Mercedes‑AMG
vehicles: always obser vethe
no tes in the Supplement. Otherwise, you may
fa ilto recognise dangers. ESP
®
can moni tor and impr ovedriving stability
and traction in thefo llowing situations, within
ph ysical limits:
R When pulling away on wet or slippe rycar ria‐
ge wa ys.
R When braking.
R Vehicles with trailer hitch: in trailer opera‐
tion from speeds of 65 km/h, if theve hicle/
trailer combination begins tosw ay from side
to side.
R Instro ng side winds when you are driving
fa ster than 80 km/h.
If th eve hicle deviates from the direction desired
by the driver, ESP ®
can stabilise theve hicle by
inter vening in thefo llowing ways:
R One or more wheels are braked.
R The engine output is adap ted according to
th e situation.
ESP ®
is deactivated if the00BB ESP®
OFF warn‐
ing lamp lights up continuously in the instrument
clus ter:
R Driving stability will no lon ger be impr oved. Driving and parking
18 5

R
Vehicles with trailer hitch: stabilisation of
th eve hicle/trailer combination is no longer
active.
R Crosswind Assist is no longer active.
R The drive wheels could spin.
R ETS/4ETS traction control is still active.
0009 When ESP ®
is deactivated, you are still assis‐
te dby ESP ®
when braking.
If th e00E5 ESP®
wa rning lamp flashes in the
instrument clus ter,one or se veralve hicle wheels
has reached its grip limit:
R Adapt your driving style to suit the cur rent
ro ad and weather conditions.
R Do not deactivate ESP ®
.
R Onlydepress the accelera tor pedal as far as
is necessar y. Deactivate ESP
®
in thefo llowing situations to
impr ove traction:
R When using snow chains.
R In deep sn ow.
R On sand or gr avel.
0009 Spinning the wheels results in a cutting
action, which enhances traction.
If th e00E5 ESP®
wa rning lamp lights up continu‐
ousl y,ESP ®
is not available due toa malfunction.
Obse rveth efo llowing information:
R Warning and indicator lamps
(0013 page 527)
R Display messages (0013 page471) ETS/4ETS (Elect
ronic Traction Sy stem)
ETS/4E TStraction control is pa rtof ESP ®
and
makes it possible topull away and accelerate on
a slippe rycar riag ewa y.
ETS/4ETS can impr ovetheve hicle's traction by
inter vening in thefo llowing ways:
R The drive wheels are braked individually if
they spin.
R More drive torque is transferred tothe wheel
or wheels with traction.
Influence of drive prog rams on ESP ®
The drive programs enable ESP ®
to adapt todif‐
fe re nt we ather and road conditions as well as
th e driver's prefer red driving style. You can
select the drive programs using theDY NA MIC
SELECT switch (0013 page159). 18 6
Driving and pa rking

Ac
tivating/deactivating ESP ®
(Electronic Sta‐
bility Prog ram) Multimedia sy
stem:
0018 Vehicle 0019
k Assistance 0019
ESP
Mercedes‑AMG vehicles: observeth e no tes in
th e Supplement. Otherwise, you may failto rec‐
ognise dangers. 0007
Activate 0073or deacti vate 0053 the function.
ESP ®
is deactivated if the00BB ESP®
OFF warn‐
ing lamp lights up continuously in the instrument
clus ter.
Obser vethe information on warning lamps and
display messages which may be shown in the
instrument clus ter. Fu
nction of ESP ®
Crosswind Assist ESP
®
Crosswind Assist de tects sudden gu sts of
side wind and helps the driver tokeep theve hi‐
cle in the lane:
R ESP ®
Crosswind Assist is active at vehicle
speeds between 80 km/h and 200 km/h when driving
stra ight ahead or cornering
slight ly.
R The vehicle is stabilised bymeans of individ‐
ual brake application on one side. Fu
nction of ESP ®
trailer stabilisation 000A
WARNING Risk of accident in poor road
and weather conditions
In poor road and weather conditions, the
trailer stabilisation cannot pr event lur ching of
th eve hicle/trailer combination. Trailers with
a high centre of grav ity may tip over before
ESP ®
de tects this. 0007
Alw ays adapt your driving style to suit
th e cur rent road and weather condi‐
tions. When driving with a trailer, ESP
®
can stabilise
yo ur vehicle if the trailer begins toswer vefrom
side toside:
R ESP ®
trailer stabilisation is active abo ve
speeds of 65 km/h. R
Slight swerving is reduced bymeans of a tar‐
ge ted, individual brake application on one
side.
R Intheeve nt of se vere swerving, the engine
output is also reduced and all wheels are
braked.
ESP ®
trailer stabilisation may be impaired or
may not function if:
R The trailer is not connec ted cor rectly or is
not de tected prope rly by theve hicle. Fu
nction of EBD (Electronic Brake forc e Dis‐
tribution) EBD is
characterised bythefo llowing:
R Monitoring and regulating the brake pressure
on there ar wheels.
R Impr oved driving stability when braking,
especially on bends. 18 8
Driving and pa rking

Fu
nction of STEER CONT ROL ST
EER CONTROL helps youby transmitting a
noticeable steering forc eto thesteering wheel in
th e direction requ ired forve hicle stabilisation.
This steering recommendation is given pa rticu‐
larly in thefo llowing situations:
R both right wheels or bo thleft wheels are on a
we t or slippe ryroad sur face when you brake
R theve hicle starts toskid
Sy stem limitations
ST EER CONTROL may be impaire d or may not
function in thefo llowing situations:
R ESP ®
is deactivated
R ESP ®
is malfunctioning
R thesteering is malfunctioning
If ESP ®
is malfunctioning, you will be assis ted
fur ther by the electric po werst eering. Fu
nction of Active Brake Assi st Ac
tive Brake Assi stconsi sts of thefo llowing
functions:
R Distance warning function
R Autonomous braking function
R Situation-dependent braking assi stance
R Vehicles with Driving Assistance Pack‐
age: Evasi veSteering Assist
Ac tive Brake Assi stcan help youto minimise the
ri sk of a collision with vehicles, cyclists or
pedestrians, or reduce the ef fects of su cha colli‐
sion.
If Ac tive Brake Assi sthas de tected a risk of colli‐
sion, a warning tone sounds and theL dis‐
ta nce warning lamp lights up in the instrument
clus ter.
If yo u do not react tothewa rning, autonomous
braking can be initiated in critical situations.
In especially critical situations, Active Brake
Assi stcan initia teautonomous braking direct ly.
In this case, thewa rning lamp and warning tone occur simultaneously wi
th the braking applica‐
tion.
If yo u apply the brake yourself in a critical situa‐
tion or apply the brake during autonomous brak‐
ing, situation-dependent braking assis tance
occu rs. The brake pressure increases up tomax‐
imum full-s top braking if necessar y. If autonomous braking or situation-dependent
braking assist
ance has occur red, display 1
appears in the multifunction display and then
automatically goes out af ter a short time.
If th e autonomous braking function or the situa‐
tion-dependent braking assis tance is trig gered, Driving and parking
18 9

additional pr
eventive measu resfo r occupant
pr otection (PRE-SAFE ®
) may also be initiated. 000A
WARNING Risk of an accident caused by
limited de tection per form ance of Active
Brake Assi st
Ac tive Brake Assi stcannot al ways clear ly
identify objects and complex traf fic situa‐
tions.
In su chcases, Active Brake Assi stmight:
R Give a warning or brake without reason
R Not give a warning or not brake 0007
Alw ays pay careful attention tothe traf‐
fi c situation; do not rely on Active Brake Assi
stalone. Active Brake Assi stis only
an aid. The driver is responsible for
maintaining a suita ble distance tothe
ve hicle in front, vehicle speed and for
braking in good time. 0007
Be prepared tobrake or swer veif nec‐
essar y. Also obser
vethe sy stem limitations of Active
Brake Assi st.
The individual subfunctions are available in
th efo llowing speed ranges:
Distance warning function The dis
tance warning function issues a warning
in thefo llowing situations:
R From appr oximately 30 km/h, if over se veral
seconds the dis tance maintained totheve hi‐
cle tr avelling in front is insuf ficient forthe
driven speed, theL distance warning
lamp lights up in the instrument clus ter.
R From appr oximately 7 km/h, if your vehicle
is critically close toave hicle or pedestrian,
yo u will hear an intermit tent wa rning tone
and theL distance warning lamp lights
up in the instrument clus ter.
Brake immediately or take evasive action, pr ovi‐
ded it is safe todo so and the traf fic situation
allo wsthis. 19 0
Driving and pa rking

R
Assi stance thro ugh po wer-assis tedsteering if
it de tects a swerving manoeuvre.
R Activation byan abrupt steering mo vement
during a swerving manoeuvre.
R Assis tance du ring swerving and stra ightening
of theve hicle.
R Reaction from a speed of appr oximately
20 km/h up toa speed of appr oximately
70 km/h.
Yo u can pr eventthe assis tance at any time by
actively steering. 000A
WARNING Risk of an accident despi te
Evasive Steering Assist
Evasive Steering Assist cann otalw ays clearly
identify objects and complex traf fic situa‐
tions.
In addition, thesteering support of Evasive
St eering Assist is general lynot su fficient to
avo id a collision. In such cases Evasive
Steering Assist can:
R give an unnecessary warning or pr ovide
assis tance
R not gi veawa rning or not pr ovide assis‐
ta nce 0007
Alw ays pay careful attention tothe traf‐
fi c situation; do not rely on Ev asive
St eering Assist alone. 0007
Beready tobrake and take evasive
action, if necessar y. 0007
Preve ntthe assis tance byactively steer‐
ing in non-critical driving situations. 0007
Drive at an appropriate speed if pedes‐
trians are close tothe path of your vehi‐
cle. Sy
stem limitations
Fu ll sy stem per form ance is not available for a
fe w seconds af ter switching on the ignition or
af te r driving off. The sy
stem may be impaired or may not function
in thefo llowing situations:
R In sno w,rain, fog, heavy spr ay, if there is
gl are, in direct sunlight or in greatlyvarying
light conditions.
R Ifth e sensors are dirty, mis ted up, damaged
or co vered.
R Ifth e sensors are impaired due tointer fer‐
ence from other radar sources, e.g. strong
ra dar reflections in multi-s torey car par ks.
R If a loss of tyre pressure or a defective tyre
has been de tected and displ ayed.
R In complex traf fic situations whe reobjects
cannot always be clearly identified.
R If pedestrians or vehicles mo vequickly into
th e sensor de tection range.
R If pede strians are hidden by other objects.
R Ifth e typical outline of a pedestrian cann ot
be distinguished from the bac kground.
R If a pedestrian is not de tected as su ch, e.g.
due tospecial clo thing or other objects.
R On bends with a tight radius. 194
Driving and pa rking

Setting
Active Brake Assi st Multimedia sy
stem:
0018 Vehicle 0019
k Assistance
0019 Active Brake Assist
Ve hicles without Driving Assistance Pack‐
age: the settings can be made af terst arting the
ve hicle.
Ve hicles with Driving Assistance Package:
th e settings can be made when the ignition is
switched on.
The following settings are available:
R Early
R Medium
R Late 0007
Select a setting.
0009 Your selection is retained when theve hicle is
next star ted.
Deactivating Active Brake Assi st
0009 It is recommended that you alw ays lea ve
Ac tive Brake Assi stactivated. 0007
Select Off.
The dis tance warning function and the auton‐
omous braking function are deactivated.
Ve hicles without Driving Assistance Pack‐
age: when theve hicle is next star ted, the
medium setting is auto matically selected.
Ve hicles with Driving Assistance Pack‐
age: Evasi veSteering Assist is not available.
When the ignition is next star ted, the
medium setting is selected auto maticallyand
Evasive Steering Assist is available.
0009 IfAc tive Brake Assi stis deactivated, the
00D4 symbol appears inthest atus bar of the
multifunction displa y. Fu
nction of Adaptive Brake Lights Ad
aptive Brake Lights warnfollowing traf fic in an
emergency braking situation wi th thefo llowing
actions:
R Byflashing the brake lamps
R By activating the hazard warning lights If
th eve hicle is braked sharply from speeds
abo ve50 km/h, the brake lamps flash rapidl y.
This pr ovides traf fic tr avelling behind you with an
ev en more noticeable warning.
If th eve hicle is tr avelling at speeds of more than
70 km/h at the beginning of the brake applica‐
tion, the hazard warning lights switch on once
th eve hicle is stationar y.When you pull away
again, the hazard warning lights will switch off
automatically at appr oximately 10km/h. Yo u
can also switch off the hazard warning lights
using the hazard warning button. Cruise control and limiter
Fu
nction of cruise control
Cruise cont rolre gulates the speed totheva lue
selec tedby the driver.
If yo u accelerate toove rtake, forex ample, the
st ored speed is not dele ted. If youre mo veyour
fo ot from the accelera tor pedal af terov ertaking,
cruise control will resume speed regulation back
to thestored speed.
Cruise contro l is operated using the cor respond‐
ing steering wheel buttons. You can store any Driving and parking
19 5

speed abo
ve20 km/h up tothe maximum speed
or up tothe set winter tyre limit.
If yo ufa ilto adapt your driving style, cruise con‐
trol can neither reduce therisk of an accident
nor override the la wsof ph ysics. It cannot take
into account road, weather or traf fic conditions.
Cruise control is only an aid. You are responsible
fo r maintaining a safe dis tance totheve hicle in
front, forve hicle speed, for braking in good time
and forst ay ing in lane.
Displa yson the multifunction display
The status of cruise control and thestored
speed are shown in the multifunction displa y. 1
Cruise cont rol is selec ted
2 Speed is sa ved, cruise control is deactivated
3 Speed is sa ved, cruise control is activated
0009 The segments extending from the cur rent
st ored speed tothe end of the scale, or to
th e set winter tyre limit, light up in the
speedome ter.
Sy stem limitations
Cruise control may be unable tomaintain the
st ored speed on uphill gradients. The stored
speed is resumed when the gradient evens out.
Change into a lo werge ar in good time on long
and steep downhill gradients. Take particular no
te ofthis when driving a laden vehicle. By
doing so, you will make use of the engine's brak‐
ing ef fect. This relie vesth e load on the brake
sy stem and pr events the brakes from overheat‐
ing and wearing tooqu ickl y.
Do not use cruise control in thefo llowing situa‐
tions:
R In traf fic situations whi chrequ ire frequent
ch anges of speed, e.g. in heavy traf fic, on
winding roads.
R On slippe ryroads. Accelerating can cause
th e drive wheels tolose traction and the
ve hicle could then skid.
R Ifyo u are driving when visibility is poor.
Fu nction of the limiter
The limiter restricts the speed of theve hicle. To
re duce the speed tothe set speed, the limiter
applies the brakes automaticall y.
Yo u can limit the speed as follo ws:
R Variable: for speed limits, e.g. in built-up
areas.
R Perm anen t:for long-term speed restrictions,
e.g. when driving in winter tyre mode. 19 6
Driving and pa rking

The
variable limiter is operated using the cor re‐
sponding steering wheel buttons. You can store
any speed abo ve20 km/h up tothe maximum
speed or up tothe set winter tyre limit. You can
also per form settings while theve hicle is station‐
ary if theve hicle has been star ted.
If yo ufa ilto adapt your driving style, the limiter
can neither reduce therisk of an accident nor
ove rride the la wsof ph ysics. It cannot take into
account road, weather or traf fic conditions. The
limiter is only an aid. You are responsible for
maintaining a safe dis tance totheve hicle in
front, forve hicle speed, for braking in good time
and forst ay ing in lane.
Displa ysinthe instrument display
The status of the limiter and thestored speed
are shown in the multifunction displa y. 1
Limiter is selected
2 Speed is stored, limiter is deactivated
3 Speed is stored, limiter is activated
0009 The segments in the speedome ter light up,
up tothe cur rently stored speed.
0009 When the driving speed is greater than the
st ored speed, display 3flashes.
Kickd own
If yo u depress the accelerator pedal be yond the
pressure point (kickdown), the limiter switches
to passive mode. The Limiter passivemessage
appears in the multifunction displa y.Af
ter completion of kickdown, theva riable lim‐
iter is activated again in thefo llowing situations:
R Ifth e driven speed drops below thestored
speed.
R Ifth estored speed is called up.
R Ifyo ustore a new speed.
Operating cruise control or theva riable lim‐
iter 000A
WARNING Risk of accident due tostored
speed
If yo u call up thestored speed and this is
lo we rth an your cur rent speed, theve hicle
decelerates. 0007
Take into account the tra ffic situation
before calling up thestored speed. Re
quirements:
Cruise control
R Cruise control is selected.
R ESP ®
must be activated, but not inter vening.
R The driven speed is at least 20 km/h. Driving and pa
rking 197

halt. The
vehicle accelerates or brakes depend‐
ing on the dis tance totheve hicle in front and
th e set speed. The speed and dis tance tothe
ve hicle in front are set and sa ved on thesteering
wheel on vehicles without the Driving Assis tance
Pa ckage, in thera nge between 20 km/h and
200 km/h and, on vehicles with the Driving
Assis tance Package, in thera nge between
20 km/h and 210 km/h.
Other features of Active Dis tance Assi st
DISTRONIC:
R Adjusts the driving style depending on the
selected drive program (fuel-saving, comfort‐
able or dynamic) (0013 page159)
R Vehicles with Driving Assistance Pack‐
age: reacts tostationary vehicles de tected in
urban speed ranges (e xcept bicycles and
mo torcyc les).
R Initiates acceleration tothestored speed if
th e turn signal indicator is switched on to
ch ange totheove rtaking lane.
R Vehicles with Driving Assistance Pack‐
age: take s one-sided overtaking restrictions
into account on mo torw ays or on multi-lane ro
ads with separate car riag ewa ys(countr y-
dependent).
Ve hicles with Active Parking Assist and Driv‐
ing Assistance Package: ifth eve hicle has
been braked toast andstill on multi-lane, stru c‐
tural lyseparate car riag ewa ysby Active Dis tance
Assi stDISTRONIC, it can au tomatically follow
th eve hicle in front driving off again within 30
seconds. If a critical situation is de tected when
driving off, a visual and acoustic warning is given
indicating that the driver must now take control
of theve hicle. The vehicle is not accelerated any
fur ther.
Ac tive Dis tance Assi stDISTRONIC is only an aid.
The driver is responsible forke eping a safe dis‐
ta nce totheve hicle in front, forve hicle speed
and for braking in good time.
Sy stem limitations
The sy stem may be impaired or may not function
in thefo llowing ins tances:
R In sno w,rain, fog, heavy spr ay, if there is
gl are, in direct sunlight or in greatlyvarying
light conditions. R
The windsc reen in the area of the camera is
dirty, mis ted up, damaged or co vered.
R Ifth era dar sensors are dirty or co vered.
R In multi- stor ey car pa rks or on roads with
st eep uphill or downhill gradients.
R Ifth ere are nar rowvehicles in front, such as
bicycles or mo torcyc les.
In addition, on slippery roads, braking or accel‐
erating can cause one or se veral wheels tolose
traction and theve hicle could then skid.
Do not use Active Dis tance Assi stDISTRONIC in
th ese situations. 000A
WARNING Risk of accident from acceler‐
ation or braking byActive Dis tance
Assi stDISTRONIC
Ac tive Dis tance Assi stDISTRONIC may accel‐
erate or brake in thefo llowing cases, for
ex ample:
R Ifth eve hicle pulls away using Active Dis‐
ta nce Assi stDISTRONIC. 200
Driving and pa rking