R
Not give a warning or not brake #
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. #
Be prepared tobrake or swer veif nec‐
essar y. 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
at speeds:
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. The Ldistance warning
lamp then lights up in the instrument clus ter. R
From appr oximately 7 km/h, if your vehicle
is critically close toave hicle or pedestrian.
An intermittent warning tone sounds and the
L 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.
The distance warning function can aid you in
th efo llowing situations with an intermit tent
wa rning tone and a warning lamp:
Ve hicles tr avelling in
front Up
toappr ox.
250 km/h
St ationary vehicles Uptoappr ox.
80 km/h
Crossing vehicles Noreaction
Moving pedestrians Uptoappr ox.
80 km/h
St ationary pedes‐
trians No
reaction Au
tonomous braking function
If th eve hicle is tr avelling at speeds abo ve
appr oxima tely 7 km/h, the autonomous
braking function may inter vene in thefo llow‐
ing situations:
Ve hicles tr avelling in
front Up
toappr ox.
200 km/h
St ationary vehicles Uptoappr ox.
50 km/h
Crossing vehicles No reaction
Moving pedestrians Uptoappr ox.
60 km/h
St ationary pedes‐
trians No
reaction 184
Driving and pa rking
Situation-dependent braking assistance
Situation-dependent braking assistance may
inter vene at speeds abo veappr oxima tely
7 km/h in thefo llowing situations:
Ve hicles tr avelling in
front Up
toappr ox.
250 km/h
St ationary vehicles Uptoappr ox.
80 km/h
Crossing vehicles No reaction
Moving pedestrians Uptoappr ox.
60 km/h
St ationary pedes‐
trians No
reaction Cancelling a brake application of
Active
Brake Assi st
Yo u can cancel a brake application byActive
Brake Assi stat any time by:
R Fully depressing the accelerator pedal or
with kickdown.
R Releasing the brake pedal. Ac
tive Brake Assi stmay cancel the brake appli‐
cation when one of thefo llowing conditions is
fulfilled:
R You manoeuv retoavoid the obs tacle.
R The reis no longer a risk of collision.
R An obs tacle is no longer de tected in front of
yo ur vehicle.
Sy stem limitations
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 great lyvarying
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
Full sy stem per form ance is not available for a
fe w seconds af ter switching on the ignition
or af ter driving off.
R In complex traf fic situations whe reobjects
cannot always be clearly identified.
R For pede strians or vehicles if they mo ve
qu ickly into the sensor de tection range.
R For pede strians who 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. Setting
Active Brake Assi st Multimedia sy
stem:
4 Vehicle 5
k Assistance
5 Active Brake Assist
The following settings are available:
R Early
R Medium Driving and parking
18 5
R
Late #
Select a setting.
% Your selection is retained when theve hicle is
next star ted.
Deactivating Active Brake Assi st
% It is recommended that you alw ays lea ve
Ac tive Brake Assi stactivated. #
Select Off.
The dis tance warning function and the auton‐
omous braking function are deactivated.
When theve hicle is next star ted, theMedium
setting is automatically selected.
% IfAc tive Brake Assi stis deactivated, the
æ 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 ertak ing,
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
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.18 6
Driving and pa rking
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
% 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 limi ter
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. 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
ov erride 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. Driving and pa
rking 187
%
When you swit choff theve hicle, the last
speed stored is cleared.
When you select cruise cont rol or Active Dis‐
ta nce Assi stDISTRONIC, the last speed
st ored forth eva riable limiter is cleared.
Pe rm anent limi ter
If th eve hicle should ne verexc eed a specific
speed (e.g. for driving in winter tyre mode), you
can set this speed with the permanent limiter.
Yo u do this by limiting the speed toava lue
between 160 km/h and 240 km/h in the multi‐
media sy stem (/ page190).
Shortly before the set speed is reached, it
appears in the multifunction displa y.When you
confirm the message with %, display mes‐
sages no longer appear until you swit choff the
ve hicle. The speed will only be displa yed again
once theve hicle has been restar ted or if the set
speed is changed.
The permanent limiter does not swit chtopas‐
sive mode even du ring kickdown and the driven
speed remains below the set speed. Setting
the speed limitation for winter tyres
Multimedia sy stem:
4 Vehicle 5
î Vehicle settings
5 Winter tyres limit #
Select a speed or deactivate the function. Ac
tive Di stance Assist DISTRO NIC Fu
nction of Active Di stance Assist
DISTRO NIC
Ac tive Dis tance Assi stDISTRONIC maintains the
set speed on free-flowing roads. If vehicles in
front are de tected, the set dis tance is main‐
ta ined, if necessar y,until theve hicle comes to a
halt. The vehicle accelerates or brakes depend‐
ing on the dis tance totheve hicle in front and
th e set speed. The speed (in thera nge between
20 km/h and 200 km/h) and the dis tance tothe
ve hicle in front are set and sa ved on thesteering
wheel. 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) (/ page150)
R Initiates ac celerationtothestored speed if
th e turn signal indicator is switched on to
ch ange totheove rtaking lane.
Ac tive Dis tance Assi stDISTRONIC is only an aid.
The driver is responsible forke eping a safe dis‐
tan cetotheve 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 Ifth ere is swirling dust, e.g. when driving off-
ro ad or on sandy sur faces.
R The windscreen in the area of the camera is
dirty, mis ted up, damaged or co vered. 19 0
Driving and pa rking
Overview of
Active Di stance Assist
DISTRO NIC displa ysinthe instrument clus‐
ter Assistant display
1
Vehicle in front
2 Distance indica tor
3 Set specified di stance Ac
tive Di stance Assist DISTRO NICstatus dis‐
play 1
Active Dis tance Assi stDISTRONIC selected,
set speci fied dis tance (number of segments
below theve hicle)
2 Active Dis tance Assi stDISTRONIC deacti va‐
te d, speed stored 3
Active Dis tance Assi stDISTRONIC acti ve,
speed stored, no vehicle de tected (gr eyvehi‐
cle symbol)
4 Active Dis tance Assi stDISTRONIC acti ve,
speed stored, vehicle de tected (green vehi‐
cle symbol)
Speedome ter
The stored speed is highlighted on the speedom‐
et er. If the speed of theve hicle in front is less
th an thestored speed, the segments in the
speedome ter light up. Activation or deacti vation
of Active Dis tance Assi stDISTRONIC, as well as
alterations tothestored speed and the dis tance
to be maintained, are displa yed in the control
fe edback of the multifunction display on a single
line. Fu
nction of Hill Start Assist Hill
Start Assist holds theve hicle for a short
time when pulling away on a hill under thefo l‐
lowing conditions:
R The elect ric pa rking brake is released. 194
Driving and pa rking
The brake application can be inter
rupte d at
any time if yousteer slightly in the opposite
direction. #
Alw ays make sure that there is suf fi‐
cient di stance tothe side forot her traf‐
fi c or obs tacles. &
WARNING Risk of accident despi teLane
Ke eping Assist
Lane Keeping Assist cann otalw ays clearly
de tect lane markings.
In su chcases, Lane Keeping Assist can:
R give an unnecessary warning
R not give a warning #
Alw ays pay particular attention tothe
traf fic situation and keep within the
lane, especially if Active Lane Keeping
Assist alerts you. Be sure
toobser vethe sy stem limitations of
Ac tive Lane Keeping Assist. Ve
hicles with Parking Assist PARKTRONIC: #
Toactivate: press button 2. #
Todeactivate: press and hold button 2.
If indicator la mp1lights up, Active Lane
Ke eping Assist is activated, the lane mark‐
ings are shown as light in the assis tance
graphic. When Active Lane Keeping Assist is
active, the lane markings are shown in green
in the assis tance graphic. Ve
hicles without Parking Assist
PA RKTRONIC: #
Activate/deactivate Active Lane Keeping
Assist via the multimedia sy stem
(/ page 222).
Sensitivity of Active Lane Keeping Assist
Wi th th eSt andard or Adaptive setting, you can
influence when thewa rning vibration of Lane
Ke eping Assist take s place.
In bo th theSt andard and Adaptive settings, no
wa rning vibration occurs in thefo llowing situa‐
tions:
R You ha veswitched on the turn signal indica‐
to r.
R A driving sa fety sy stem inter venes, su chas
ABS, BAS or ESP ®
.
In theAd aptive setting, there will also be no
wa rning vibration in thefo llowing situations:
R The vehicle is accelerated or braked consid‐
erabl y.
R Yousteer activel y,e.g. swer vetoavo id an
obs tacle or change lane quickl y. Driving and pa
rking 221
A displ
aymessa gemay appear on the multifunc‐
tion display even if the trailer has been connec‐
te d cor rectly:
R LEDs ha vebeen ins talled in the trailer light‐
ing sy stem
R The cur rent has fallen below the trailer light‐
ing sy stem's minimum cur rent (50 mA).
% Accessories can be connected tothe perma‐
nent po wer supp lyup to180W, and tothe
po we r supp lythat is swit ched on via the igni‐
tion loc k.
Un coupling a trailer &
WARNING Risk of being crushed and
becoming trapped when uncoupling a
trailer
When uncoupling a trailer wi than engaged
ine rtia-activated brake, your hand may
become trapped between theve hicle and the
trailer dr awbar. #
Do not uncouple trailers with an
engaged overrun brake. #
Secu rethe trailer against rolling away. #
Disconnect the electrical connection
between theve hicle and the trailer. #
Uncouple the trailer. #
Place the co ver on the ball head. Ve
hicle towing instructions
The vehicle is not suitable forth e use of tow bar
sy stems that are used forflat towing or ding hy
to wing, forex ample. Attach ing and using tow bar
sy stems can lead todamage on theve hicle.
When you are towing a vehicle with tow bar sys‐
te ms, safe driving characteristics cannot be
guaranteed forth eto wing vehicle or theto wed
ve hicle. The vehicle-trailer combination may
swer vefrom side toside. Comply with the per‐
mitted towing me thods (/ page 401) and the
instructions forto wing with bo thaxles on the
ground ( /page 401). 224
Driving and parking