2019 MERCEDES-BENZ S-CLASS CABRIOLET Owner's Manual

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 great lyvarying
ambient light.
R The windshield in the area of the camera is
dirty, fogged up, damaged or co vered.
R Ifth era dar sensors are dirty or co vered.
R In parking garage s or on roads with steep
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. &
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.
R Ifth estored speed is called up and is
considerably faster or slo werth an the
cur rently driven speed.
R IfAc tive Dis tance Assi stDISTRONIC no
longer de tects a vehicle in front or does
not react toreleva nt objects. #
Alw ays carefully obser vethe traf fic con‐
ditions and be ready tobrake at all
times. #
Take into account the tra ffic situation
before calling up thestored speed. &
WARNING Risk of accident due toinsuf‐
fi cient decele ration byActive Dis tance
Assi stDISTRONIC
Ac tive Dis tance Assi stDISTRONIC brakes
yo ur vehicle with up to50% of the maximum
possible deceleration. If this decele ration is
not su fficient, Active Dis tance Assi st
DISTRONIC alerts you with a visual and
acoustic warning. #
Inthese cases, adjust your speed and
ke ep a suf ficient di stance. #
Brake theve hicle yourself and/or take
ev asive action. &
WARNING Risk of accident if de tection
function of Active Dis tance Assi st
DISTRONIC is impaired
Ac tive Dis tance Assi stDISTRONIC does not
re act or has a limited reaction:
R when driving on a dif fere nt lane or when
ch anging lanes Driving and parking
167

R
topedestrians, animals, bicycles or sta‐
tionary vehicles, or unexpected obs tacles
R tocompl extraf fic conditions
R tooncoming vehicles and crossing traf fic
As a result, Active Dis tance Assi st
DISTRONIC may nei ther give warnings nor
inter vene in su chsituations. #
Alw ays obser vethe tra ffic conditions
carefully and react accordin gly. Operating
Active Di stance Assist DIST RONIC
Re quirements:
R The vehicle has been star ted.
R The elect ric pa rking brake is released.
R ESP ®
is activated and is not inter vening.
R The transmission is in position 005B.
R Allthe doors are closed.
R Check of thera dar sensor sy stem has been
successfully comple ted (vehicle tra veling
fa ster than 12 mp h (20 km/h)). R
Parking Assist PARKTRONIC is not being
used topark theve hicle or toexit from a
parking space.
R The vehicle does not skid. #
Toactivate/deacti vate Active Di stance
Assist DIST RONIC: press button 1. #
Toactivate Active Di stance Assist
DISTRO NIC:press rock er switch 3up (SET +) or down (SET-), or press
rocker switch 4
up. Remo veyour foot from the accelerator
pedal.
The cur rent speed is stored and maintained
by theve hicle.
or #
Toactivate Active Di stance Assist
DISTRO NIC with a stored speed: press
rock er switch 4up. Remo veyour foot from
th e accelerator pedal.
% Ifrock er switch 4is pressed up again af ter
activation with a stored speed, Active Dis‐
ta nce Assi stDISTRONIC is acti vated with the
speed restriction displ ayed in the instrument
clus ter. #
Toaccept the displa yed speed restriction
when Active Di stance Assist DISTRO NIC
is active: pressrocker switch 4up (RES).
The speed limit displa yed in the instrument
clus ter is adopte d asthestored speed. The
ve hicle adapts its speed tothat of theve hicle
in front, but only up tothestored speed. #
Topull away with Active Di stance Assist
DISTRO NIC:remo veyour foot from the 16 8
Driving and pa rking

brake pedal and activate
Active Dis tance
Assi stDISTRONIC. #
Press rocker switch 4up (RES).
or #
Depress the accelerator pedal briefly and
fi rm ly.
The functions of Active Dis tance Assi st
DISTRONIC continue tobe car ried out. &
WARNING Risk of accident due toActive
Dis tance Assi stDISTRONIC still being
activated when you lea vethe driver's
seat
If yo u lea vethe driver's seat while theve hicle
is being braked byActive Dis tance Assi st
DISTRONIC only, theve hicle can rollaw ay. #
Alw ays deactivate Active Dis tance
Assi stDISTRONIC and secure theve hi‐
cle topreve nt it from rolling away
before you lea vethe driver's seat. #
Todeactivate Active Di stance Assist
DISTRO NIC:press rock er switch 4down
(CNCL). #
Toincrease/reduce speed: pressrock er
switch 3up/down tothe pressure point.
The stored speed is increased or reduced by
1 mp h (1 km/h).
or #
Press and hold rocker switch 3up/down to
th e pressure point.
The stored speed is increased or reduced in
increments of 1 mph (1 km/h).
or #
Press rocker switch 3beyond the pressure
point.
The stored speed is increased or reduced by
5 mp h (1 0 km/h).
or #
Press and hold rocker switch 3beyond the
pressure point.
The stored speed is increased or reduced in
increments of 5 mph (10 km/h). #
Toincrease or reduce the speci fied dis‐
tance from theve hicle in front: press
rock er switch 2up or down. Fu
nction of Active Speed Limit Assi st %
The availability of thefo llowing function is
countr y-dependent. If a
change in the speed limit is de tected and
Ac tive Dis tance Assi stDISTRONIC is acti vated,
Ac tive Dis tance Assi stDISTRONIC adapts this
new speed as thestored speed. Driving and parking
16 9

The driven speed is adjus
ted when theve hicle is
le ve l with the traf fic sign at the latest. In the
case of signs indicating entry into an urban area,
th e speed is adap ted beforehand. The speed
limit display in the Instrument Display is alw ays
updated when theve hicle is le vel with the tra ffic
sign.
If th ere is no speed restriction on an unlimi ted
st re tch of road (e.g. on a free way), there com‐
mended speed is adop ted as thestored speed.
The sy stem uses the speed stored on an unlimi‐
te dstre tch of road as there commended speed.
If yo u do not alter thestored speed on an unlimi‐
te dstre tch of road, there commended speed is
80 mph (130 km/h).
If Ac tive Dis tance Assi stDISTRONIC has been
put into passi vemode bypressing the accelera‐
to r pedal, only speed limits which are higher
th an the set speed are adop ted.
Ac tive Speed Limit Assi stis only an aid. The
driver is responsible forke eping a safe dis tance
to theve hicle in front, forve hicle speed and for
braking in good time. The maximum permissible
speed also depends on factors su chasthero ad
sur face and traf fic conditions. Sy
stem limitations
Te mp orary speed restrictions (e.g. for a cer tain
time or due towe ather conditions) cannot be
proper ly detected bythe sy stem. The maximum
permissible speed applying for a vehicle with a
trailer is not de tected bythe sy stem. In these sit‐
uations you must adjust your speed yourself. &
WARNING Risk of accident due toActive
Speed Limit Assi stadapting theve hicle's
speed
The speed adop tedby Active Speed Limit
Assi stmay be too high or incor rect in some
individual cases, su chas:
R Inthewe t or in fog
R When towing a trailer #
Ensure that the driven speed complies
with traf fic re gulations. #
Adjust the driving speed tosuit cur rent
traf fic and weather conditions. Fu
nction of route-based speed adaptation %
The availability of thefo llowing function is
countr y-dependent.
When Dis tance Assi stDISTRONIC is acti ve,the
function adju ststh e speed depending on the
ro ute events ahead. Depending on the drive pro‐
gram selected, theve hicle negotiates thero ute
eve nt ahead in a fuel-s aving, com fortable or
dynamic manner. When thero ute event has been
passed, theve hicle accelerates again tothe
st ored speed. The set dis tance totheve hicle in
front, vehicles de tected ahead and speed restric‐
tions ahead are take n into account.
Ro ute-based speed adjustment can byconfig‐
ured in the multimedia sy stem (→ page171).
Ro ute events ahead are:
R Bends
R T-intersections, traf fic circles and tollst a‐
tions
R Turns and exits
% When theto llst ation is reached, Active Dis‐
ta nce Assi stDISTRONIC adopts the speed as
th estored speed. 17 0
Driving and pa rking

Also,
the speed is reduced if the turn signal to
ch ange lanes is swit ched on and one of thefo l‐
lowing situations is de tected:
R Turning off at intersections
R Driving on slowing-down lanes
R Driving on lanes adjacent toslowing-down
lanes
The driver is responsible forch oosing theright
speed and observing other road users. This
applies in particular tointersections, traf fic cir‐
cles and traf fic lights, as route-based speed
adap tation does not brake theve hicle toast and‐
st ill.
When route guidance is active, thefirs t speed
adjustment is car ried out automaticall y.Ifthe
turn signal indica tor is switched on, the selected
ro ute is confirmed and fur ther speed adjustment
is activated.
Speed adjustment is canceled in thefo llowing
cases:
R Ifth e turn signal indicator is switched off
before thero ute event. R
Ifth e driver depresses the accelerator or
brake pedal during the process.
Sy stem limitations
Ro ute-based speed adap tation does not take
ri ght of wayre gulations into account. The driver
is responsible for complying with road traf fic
re gulations and driving at a suitable speed.
In dif ficult conditions (e.g. unclear roads, nar row
lanes, wetro ad sur faces, snow or ice) or when
driving wi tha trailer, the speed adjustment made
by the sy stem may not alw ays be suitable. In
th ese situations the driver must inter vene
acco rdingly. &
WARNING Risk of accident in spi teof
ro ute-based speed adjustment
Ro ute-based speed adjustment might mal‐
function or be temp orarily una vailable in the
fo llowing situations:
R If map data is not up todate or available
R Ifyo u do not follow the selected route
guidance R
Ifth e set route is re-planned
R Inroad con stru ction areas
R When towing a trailer
R In bad weather or road conditions
R Ifth e accelera tor pedal is depressed #
Adjust the speed tothe traf fic situation. Setting
route-based speed adjustment Re
quirements:
R Active Dis tance Assi stDISTRONIC is acti va‐
te d.
Multimedia sy stem:
, Vehicle .
k Assistance .
Speed
Adjustment #
Activate 0073or deacti vate 0053 the function. Driving and parking
171

Ac
tive Steering Assist Fu
nction of Active Steering Assist
Ac tive Steering Assist is count ry-dependent and
only available forve hicles with the Driving Assis‐
ta nce Package.
Ac tive Steering Assist is operational at speeds
up to130mp h (2 10km/h) and helps youto stay
in the center of the lane bymeans of moderate
st eering inter ventions. It uses theve hicle in front
and the lane markings as a refere nce depending
on the driven speed.
When the sy stem is actively steering, theè
symbol is shown in green in the multifunction
displa y.
Ste ering and touch de tection
The driver is requiredtokeep their hands on the
st eering wheel at all times and tobe able to
inter vene at any time. The driver mu stexpect a
ch ange from active topassive mode or vice
ve rsa at any time. If
th e sy stem reaches a sy stem limitation or the
driver has not steered theve hicle for a consider‐
able period of time or has remo vedth eir hands
from thesteering wheel, the sy stem will,
depending on the situation, firs t alert the driver
with a visual warning. Display 1appears in the
multifunction displa y.Ifth e driver still does not
st eer theve hicle, or has still not take n hold of
th esteering wheel, a repeated warning tone
sounds in addition tothe visual warning mes‐
sage toremind the driver totake control of the
ve hicle.
The warning message does not appear or disap‐
pears if one of thefo llowing conditions are me t:
R The driver steers theve hicle. R
The driver presses a steering wheel button or
operates Touch Control.
Ac tive Steering Assist is only an aid. The driver is
re sponsible forth e dis tance totheve hicle in
front, forve hicle speed, for braking in good time
and forst ay ing in lane. Before changing lanes,
th e driver must make sure that the neighboring
lane is free (glance over the shoulder).
Sy stem limitations
Ac tive Steering Assist has a limited steering tor‐
qu efo r lateral guidance. In some cases, the
st eering inter vention is not su fficient tokeep the
ve hicle in the lane.
If th e de tection of lane markings and vehicles
ahead is impaired, Active Steering Assist
switches topassive mode. The sy stem pr ovides
no support in this case. During the transition
from the active topassive status, theè sym‐
bol is shown as enlar ged and flashes yello w.
Once the sy stem is passive theè symbol is
gr ay ed out in the multifunction displa y.17 2
Driving and pa rking

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, direct sunlight, great lyvarying ambient
light, reflections or strong shado wsonthe
ro adw ay.
R Insuf ficient road illumination.
R The windshield in the area of the camera is
dirty, fogged up, damaged or co vered.
R Absence of lane markings, or se veral unclear
lane markings, or if the markings change rap‐
idl y.
R The dis tance totheve hicle in front is too
small and the lane markings thus cannot be
de tected.
R The road is nar rowand winding.
R Obs tacles on the lane or projecting out into
th e lane.
The sy stem does not pr ovide assis tance in the
fo llowing conditions:
R On tight bends, traf fic circles and when turn‐
ing. R
When acti velych anging lane without swit ch‐
ing on the turn signal. &
WARNING Risk of accident if Active
St eering Assist unexpectedly stops func‐
tioning
If th e sy stem limitations of Active Steering
Assist are reached there is no guarantee that
th e sy stem will remain active or will keep the
ve hicle in lane. #
Alw ayske ep your hands on thesteering
wheel and obser vethe tra ffic carefull y. #
Alw aysst eer theve hicle paying atten‐
tion totraf fic conditions. &
WARNING Risk of accident if Active
St eering Assist unexpectedly inter venes
A malfunction in the de tection of lane mark‐
ings and objects can occu r.
This could cause unexpected steering inter‐
ve ntion. #
Steer according totraf fic conditions. Ac
tivating Active Steering Assist
Re quirements
R ESP ®
must be activated, but not inter vening.
R Active Dis tance Assi stDISTRONIC is acti va‐
te d. #
If indicator lamp 1is off: press button 2. Driving and parking
17 3

Fu
nction of Active Lane Change Assi st
% The availability of thefo llowing function is
countr y-dependent.
Ac tive Lane Change Assi stsupports the driver
when changing lanes byapplying steering torque
if th e driver operates a turn signal.
Assis tance when changing lanes is pr ovided if all
th efo llowing conditions are me t:
R You are driving on a free way or road with
multiple lanes in the direction of tr avel.
R The neighboring lane is separated bya bro‐
ke n lane ma rking.
R Novehicle is de tected in the adjacent lane.
R The driven speed is between 50 mph
(80 km/h) and 110mp h (1 80 km/h).
R Active Lane Change Assi stis switched on in
th e multimedia sy stem.
R Active Steering Assist is switched on and
active. If no
vehicle is de tected in the adjacent lane and
a lane change is permit ted, thesteering wheel
symbol and the ar row are shown in green 2.
The Lane Change to the Left message appears,
fo rex ample. If Active Lane Change Assi sthas
been activated with the turn signal indicator but
a lane change is not immediately possible, the
st eering wheel symbol remains green and the
ar row appears gray 1 . When the lane change
suppo rtstarts, the turn signal indicator is auto‐
matically activated.
If a lane change is not possible, the ar row fa des
out af ter a few seconds and a new lane change
must be initiated. An immediate lane change is on
ly possible on free way sections without speed
limits.
If th e sy stem is impaired, Active Lane Change
Assi stmay be canceled. If it is canceled, the
Lane Change Canceled message appears inthe
multifunction display and a warning tone sounds. &
WARNING Risk of accident from chang‐
ing lane toan occupied adjacent lane
Lane Chan geAssi stcannot al ways detect
clear lyifth e adjacent lane is free.
The lane change might be initiated although
th e adjacent lane is not free. #
Before changing lanes, make sure that
th e neighboring lane is free and there is
no danger to otherroad users. #
Monitor the lane change. 174
Driving and pa rking