
R
Ifth e sensors malfunction due to otherradar
source inter fere nce, forex ample strongradar
re flections 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.
The sy stem may not react cor rectly:
R In compl extraf fic st ations where objects
cannot alw ays be clearly identified.
R Topedestrians or vehicles if they mo ve
qu ickly into the sensor de tection range.
R Topedestrians 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 recognised 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:
, Vehicle .
k Assistance .
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 pac kage:
The settings can be made when the ignition is
switched on.
% It is recommended that you alw ays lea ve
Ac tive Brake Assi stswitched on.
The moment of warning or inter vention can be
adjus ted as follo ws: #
Select Active Brake Assist Warning/brake
application: early: your selection is retained
when theve hicle is next star ted. #
Select Active Brake Assist Warning/brake
application: medium :yo ur selection is
re tained when theve hicle is next star ted. #
Select Active Brake Assist Warning/brake
application: late :yo ur selection is retained
when theve hicle is next star ted. #
Select Active Brake Assist Warning/brake
application: off:
Ve hicles without Driving Assistance pack‐
age: The dis tance warning function and the
autonomous braking function are deactiva‐
te d. When theve hicle is next star ted, the
middle setting is auto matically selected.
Ve hicles with Driving Assistance pack‐
age: The dis tance warning function and the
autonomous braking function are deactiva‐
te d. Evasive Steering Assist is una vailable.
When the ignition is next star ted, the middle
setting is selected automatically and Evasive
St eering Assist is available.
% When Active Brake Assi stis deactivated, the
æ symbol appears inthe assis tance
graphic in the multifunction displa y. Driving and pa
rking 18 9

Fu
nction of Adaptive Brake Lights Ad
aptive Brake Lights warnfollowing traf fic in an
emergency braking situation:
R byflashing brake lamps
R byactivating the hazard warning lights
Ad aptive Brake Lights ha vethefo llowing charac‐
te rist ics:
R Ifyo u brake sharply at a speed abo ve
50 km/h, or if braking is assi sted byBAS or
Ac tive Brake Assi st,th e brake lamps flash
ra pidl y.This pr ovides traf fic tr ave lling behind
yo u with an even more noticeable warning.
R Ifyo u brake sharply toast andstill from a
speed abo ve70 km/h, the hazard warning
lights are activated automatically once the
ve hicle is stationar y.The brake lamps light
up again cons tantly when you depress the
brake pedal. The hazard warning lights
switch off automatically when you drive
fast erthan 10 km/h. You can also swit choff
th e hazard warning lights using the hazard
wa rning button. The
vehicle is braked considerably when moving
fast erthan 50 km/h:
R Brake Assist Sy stem (BAS) and Active Brake
Assi stsupport you during braking.
R Brake Assist activates theAd aptive Brake
Lights.
R The brake lamps flash rapidl y. Cruise control and limiter
Fu
nction of cruise control
Cruise cont rol accelerates and brakes theve hi‐
cle automatically in order tomaintain a pr evi‐
ously stored speed.
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.
Yo u can operate cruise cont rol with the cruise
control le ver.
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 rth e dis tance totheve hicle in front, forve hi‐
cle speed, for braking in good time and forst ay‐
ing in lane.
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.
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 when visibility is poor
Fu nction of the limi ter
The limiter restricts the speed of theve hicle. To
re duce the speed swiftly tothe set speed, the
limiter applies the brakes automatically. 19 0
Driving and pa rking

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 wi thwinter tyres fitted.
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 forthe
dis tance totheve hicle in front, forve hicle
speed, for braking in good time and forst ay ing
in lane.
Yo u can operate theva riable limiter with the
cruise control le ver.Yo u can store any road
speed abo ve20 km/h. You can also per form
settings while theve hicle is stationary if the
ve hicle has been star ted.
Kickdown
If yo u depress the accelerator pedal be yond the
pressure point (kickdown), the limiter is
switched topassive mode. The Limiter passive
message 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 &
WARNING Risk of accident due to
unknown stored speed
If yo u call up thestored speed and this is
lo we rth an your cur rent speed, theve hicle
decelerates.
If yo u do not kn owthestored speed, the
ve hicle could decelerate unexpectedly. #
Take into account the tra ffic situation
before calling up thestored speed. #
Ifth estored speed is not known, store
th e desired speed again. 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 braking ef fect
of the engine. This relie vesth e load on the brake
sy stem and pr events the brakes from overheat‐
ing and wearing tooqu ickl y.
Re quirements:
Cruise control
R Cruise control is selected.
R ESP ®
must be switched on, but not inter ven‐
ing.
R The driving speed mu stbe at least 20 km/h.
Va riable Limiter
R The vehicle has been star ted.
R The variable limiter is selec ted. Driving and parking
191

%
Onvehicles with a segment display in the
speedome ter,th e segments extending from
th e cur rent stored speed tothe end of the
scale light up. If you ha veactivated the per‐
manent limiter and a speed is stored, the
segments extending up tothestored speed
light up.
% Ifyo u per form a kickdown, theva riable lim‐
iter is swit ched topassive mode. The varia‐
ble limiter is operational again once the
speed drops below thestored speed.
% Ifyo u brake, deactivate ESP ®
or if ESP ®
inter venes, cruise control is deacti vated. The
va riable limiter is not deactivated.
When you swit choff theve hicle, the last
speed stored is cleared.
Pe rm anent limi ter
If yo u wish tolimit the speed permanently to a
specific value (e.g. for driving on winter tyres),
yo u can set this speed with the permanent lim‐
iter.
Yo u do this by limiting the speed toava lue
between 160 km/h and 240 km/h in the multi‐
media sy stem (→ page193). 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.
The permanent limiter does not switch topas‐
sive mode even du ring kickdown and the driven
speed remains below the set speed.
Setting the speed limit for winter tyres
Multimedia sy stem:
, Vehicle .
î Vehicle settings .
Win-
ter tyres limit #
Select the speed or deactivate the function. Distance Pilot DISTRONIC
Fu
nction of Distance Pilot DISTRONIC
Dis tance Pilot DISTRONIC:
R Maintains the set speed and accelerates or
decelerates theve hicle if the dis tance from
th eve hicle in front permits. R
Assists you in main taining the dis tance from
th eve hicle in front and can bring your vehi‐
cle toast andstill if necessar y.
R Brakes your vehicle with up to50 % of the
maximum possible braking po wer.If greater
decele ration pe rformance is requ ired, a vis‐
ual and acoustic warning is given and you
must then inter vene yourself.
R Vehicles with Driving Assistance Pack‐
age, Parking Pilot and COMAND Online:
When driving in stop-s tart traf fic, the driver is
suppor tedby an extended, au tomatic restart
in traf fic jams.
R Vehicles with Driving Assistance Pack‐
age: Responds in urban speed ranges tosta‐
tionary vehicles (e xcept bicycles, mo torcy‐
cles and pede strians) if conditions are suf fi‐
cient toenable de tection.
If yo ufa ilto adapt your driving style, Dis tance
Pilot DISTRONIC can nei ther reduce therisk of
an accident nor override the la wsof ph ysics.
Dis tance Pilot DISTRONIC cannot take into
account road, weather or traf fic conditions. Dis‐
ta nce Pilot DISTRONIC is only an aid. You are Driving and parking
19 3

Display of Distance Pilot DISTRONIC in
the
assi stance graphic and in the speedome ter 1
Vehicle ahead
2 Distance indica tor
3 Set specified di stance
4 Own vehicle 1
Speed of vehicle ahead
2 Stored speed
Displa ysinthe multifunction display
When activating Dis tance Pilot DISTRONIC or
when changing thestored speed, the new stored
speed is shown for around five seconds in the
ç multifunction display 70 km/h.
When Dis tance Pilot DISTRONIC is acti ve,th e set
st ored speed is displa yed next totheç sym‐
bol. When dis tance control is acti ve,th e symbol
is shown in green.
Ve hicles with the Driving Assistance Pack‐
age: On mo torw ays or high-speed major roads th
eç symbol is displa yed cyclically when the
ve hicle is ready topull away.
Ve hicles with Speed Limit Pilo t:If a speed
limit is automatical lyadop ted, this is shown as
th estored speed with theê symbol.
Operating Distance Pilot DISTRONIC &
WARNING Risk of accident if de tection
function of Dis tance Pilot DISTRONIC is
impaired
The Dis tance Pilot DISTRONIC does not
re act:
R topeople or animals
R tostationary obs tacles on thero ad, e.g.
st opped or par kedve hicles (vehicles with‐
out the Driving Assis tance Package)
R tostationary obs tacles on thero ad, e.g.
st opped or par kedve hicles, if conditions
are not suf ficient toenable de tection
(vehicles wi th the Driving Assis tance
Pa ckage)
R tooncoming vehicles and crossing traf fic19 6
Driving and pa rking

As a
result, Dis tance Pilot DISTRONIC may
nei ther give warnings nor inter vene in su ch
situations. #
Alw ays carefully obser vethe traf fic con‐
ditions and be ready tobrake at all
times. &
WARNING Risk of accident due tolimi‐
te d de tectability of road users and traf fic
situations
Dis tance Pilot DISTRONIC cannot al ways
clear lyidentify other road users and complex
traf fic situations.
In these conditions, Dis tance Pil ot
DISTRONIC may:
R give an unnecessary warning and then
brake theve hicle
R neither give a warning nor inter vene
R accele rate or brake unexpectedly #
Continue driving with care and be ready
to brake, particular lyif Dis tance Pilot
DISTRONIC warnsyo u. &
WARNING Risk of accident due toinsuf‐
fi cient decele ration byDis tance Pilot
DISTRONIC
Dis tance Pilot DISTRONIC brakes your vehi‐
cle with up to50% of the maximum possible
braking po wer.If th is decele ration is not suf‐
fi cient, Dis tance Pilot DISTRONIC alerts you
with a visual and acoustic warning. #
Apply the brakes yourself in these situa‐
tions and try totake evasive action. &
WARNING Risk of accident due toDis‐
ta nce Pilot DISTRONIC still being activa‐
te d when you lea vethe driver's seat
If yo u lea vethe driver's seat while theve hicle
is being braked byDis tance Pilot DISTRONIC
only, it can rollaw ay inthefo llowing situa‐
tions:
R Ifth ere is a malfunction in the sy stem or
in the po wer supp ly. R
If Dis tance Pilot DISTRONIC is deacti va‐
te d with the cruise control le ver,e.g. by a
ve hicle occupant or from outside the
ve hicle.
R Ifth e electrics in the engine compart‐
ment, the battery or the fuses are tam‐
pered with.
R Ifth e battery is disconnected.
R Ifth eve hicle is accelerated, e.g. by a
ve hicle occupant. #
Alw ays deactivate Dis tance Pilot
DISTRONIC and secu retheve hicle to
pr eve nt it from rolling away before you
lea vethe driver's seat. &
WARNING Risk of accident due to
unknown stored speed
If yo u call up thestored speed and this is
lo we rth an your cur rent speed, theve hicle
decelerates.
If yo u do not kn owthestored speed, the
ve hicle could decelerate unexpectedl y. Driving and pa
rking 197

#
Take into account the tra ffic situation
before calling up thestored speed. #
Ifth estored speed is not known, store
th e desired speed again. &
WARNING Risk of accident due tounex‐
pec ted acceleration byDis tance Pilot
DISTRONIC
If Dis tance Pilot DISTRONIC no longer
de tects a vehicle in front, it may unexpect‐
edly accelerate tothe speed stored.
R This speed may be too high for a filter
lane or a slip road.
R If driving in theright lane, this speed may
be so high that you pass vehicles driving
on the left (in count ries where traf fic
drives on theright).
R If driving in the left lane, this speed may
be so high that you pass vehicles driving
on theright (in countri es where traffic
drives on the left). Alw
ays carefully obser vethe traf fic condi‐
tions and be ready tobrake at all times. &
WARNING Risk of accident due toDis‐
ta nce Pilot DISTRONIC pulling away auto‐
matically
If Dis tance Pilot DISTRONIC pe rforms an
automatic driving-off procedure, theve hicle
may accelerate unexpectedly.
Where necessar y,brake theve hicle yourself
and take evasive action. &
WARNING Risk of accident due toSpeed
Limit Pilot adapting theve hicle's speed
The speed adop tedby the Speed Limit Pilot
may be too high or incor rect in some individ‐
ual 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. Re
quirements:
R The vehicle has been star ted.
R The elect ric pa rking brake is released.
R Parking Pilot is not being used topark the
ve hicle or toexit from a parking space.
R ESP ®
is activated, but is not inter vening.
R The transmission is in position h.
R The driver's door, front passenger door and
there ar doors are closed.
R The engine bonnet is closed. 19 8
Driving and pa rking

or
#
Accelerate brie fly.
Yo ur vehicle pulls away and adapts its speed
to that of theve hicle in front. If no vehicle is
de tected in front, your vehicle accelerates to
th e set speed.
Ad opting the speed limit as thesto red speed
Re quirements:
R Speed Limit Pilot is activated in the multime‐
dia sy stem (→ page 231).
R Distance Pilot DISTRONIC is acti vated.
R The sy stem de tects a traf fic sign indicating a
speed limit. #
Brie fly pull the cruise control le verto wa rds
yo u3.
The displ ayed speed limit is adop ted as the
st ored speed. Your vehicle adapts its speed
to that of theve hicle in front, but only up to
th estored speed. If Speed Limit Pilot is acti‐
va ted, any de tected changes in the speed
limit are adop tedby the sy stem. Collision
warning
If Dis tance Pilot DISTRONIC is unable tosuf fi‐
ciently decele rate theve hicle in order topreve nt
it from approa ching theve hicle in front, you will
be warned visually and acousticall y.An intermit‐
te nt wa rning tone will then sound and the dis‐
ta nce warning lamp will light up in the instru‐
ment clus ter. #
Brake immediately in order toinc rease the
dis tance from theve hicle in front.
or #
Take evasive action pr ovided it is safe todo
so. Fu
nction of DRIVE PIL OT The DRIVE PI
LOT function is available only
on vehicles with the Driving Assistance
pa ckage.
DRIVE PIL OTincludes thefo llowing driving and
driving saf ety sy stems:
R Steering Pilot with Active Lane Change Assi st
( → page 200)
R Distance Pilot DISTRONIC (→ page 193) R
Speed Limit Pilot (→ page 193) Ste
ering Pilot Fu
nction of Steering Pilot
Ste ering Pilot is only available forve hicles
with the Driving Assistance Package.
R Steering Pilot is operational at speeds up to
21 0 km/h and helps youto stay inthe cent re
of the lane bymeans of moderate steering
inter ventions.
R It uses as a refere nce theve hicle in front or
th e lane markings, depending on the driven
speed.
R Steering Pilot requ ires you as the driver, to
ke ep your hands on thesteering wheel at all
times so that you are able tointer vene at any
time tocor rect the course of theve hicle and
ke ep it in lane.
R Steering Pilot can be overridden at any time
by steering theve hicle yourself.
R Ifth e sy stem de tects that there are no lane
markings, it uses theve hicle ahead as a ref‐
erence up toa speed of 130 km/h. 200
Driving and parking