Page 161 of 482

RIfth e sensors malfunction due to otherradar
source inter fere nce, forex ample strongradar
re flections in parking garage s.
RIf a loss of tire pressure or a defective tire
has been de tected and displ ayed.
The sy stem may not react cor rectly:
RIn complex traffic st ations where objects
cannot alw ays be clearly identified.
RTo pedestrians or vehicles if they mo ve
qu ickly into the sensor de tection range.
RTo pedestrians who are hidden by other
objects.
RIf th e typical outline of a pedestrian cannot
be distinguished from the bac kground.
RIfa pedestrian isnot recognized as such , e.g.
due tospecial clo thing or other objects.
ROn bends with a tight radius.
Setting Active Brake Assi st
Multimedia system:
, 9 H K L F O H.k $ V V L V W D Q F H. $ F W L Y H
% U D N H $ V V L V W
Ve hicles without Driving Assistance Pack‐
age: The settings can be made af terst arting the
ve hicle.
Ve hicles with Driving Assistance Package:
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 $ F W L Y H % U D N H $ V V L V W : D U Q L Q J % U D N H
$ S S O L F D W L R Q ( D U O \: your selection isretained
when theve hicle is next star ted.
#Select $ F W L Y H % U D N H $ V V L V W : D U Q L Q J % U D N H
$ S S O L F D W L R Q 0 H G L X P :yo ur selection is
re tained when theve hicle is next star ted.
#Select $ F W L Y H % U D N H $ V V L V W : D U Q L Q J % U D N H
$ S S O L F D W L R Q / D W H: your selection is retained
when theve hicle is next star ted.
#Select $ F W L Y H % U D N H $ V V L V W : D U Q L Q J % U D N H
$ S S O L F D W L R Q 2 I I:
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 parking 15
9
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Speed control cruise control
Function 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 accelerator pedal af terove rtaking,
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 drivin gst yle, 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 your 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:RIn traf fic situations whi chrequ ire frequent
ch anges of speed, e.g. in heavy traf fic, on
winding roads.
ROn slippery roads. Accelerating can cause
th e drive wheels tolose traction and the
ve hicle could then skid.
RWhen visibility is poor.
Operating cruise control
& WARNING Risk of accident due to
unkno wnstored speed
If yo u call up thestored speed and this is
lo we rth an your cur rent speed, theve hicle
decelerates.
If yo udo not kn owthestored speed, the
ve hicle could decelerate unexpectedly.
#Take into account the tra ffic situation
before calling up thestored speed.
#If th 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, youwill 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
RCruise control is selected.
RESP®must be switched on, but not inter ven‐
ing.
RThe driving speed must be at least15mp h
(20 km/h).
16 0
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#Stores cur rent speed 2(once af terst arting
th eve hicle).
or
#Calls up stored speed 2.#Deactivates cruise contro l1.
#Press the le ver brief ly:st ored speed is
increased 3orreduced
4 by1mp h (1 km/h).
or
#Press the le ver be yond the pressure point:
st ored speed is increased 3orreduced
4 by10 mph (10 km/h).
If cruise contro l has been deactivated, the cur‐
re nt driven speed is adop ted with 3or4. %
Ifyo u brake, deactivate ESP
®or if ESP®
inter venes, cruise control is deacti vated.
When youswit choff theve hicle, the last
speed stored is cleared.
Setting the speed limit for winter tires
Multimedia sy stem:
, 9 H K L F O H.î 9 H K L F O H 6 H W W L Q J V. : L Q
W H U 7 L U H V / L P L W
#Select the speed or deactivate the function.
Distance Pilot DISTRONIC
Fu nction of Distance Pilot DISTRONIC
Dis tance Pilot DISTRONIC:
RMaintains the set speed and accelerates or
decelerates theve hicle if the dis tance from
th eve hicle in front permits.
RAssists youin main taining the dis tance from
th eve hicle in front and can bring your vehi‐
cle toast andstill if necessar y.
RBrakesyour vehicle with up to50 % of the
maximum possible braking po wer.If greater
decelera tion performance is requ ired, a vis‐
Driving and parking 16
1
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ual and acousticwarning is given and you
must then inter vene yourself.
RVe hicles with Driving Assistance Pack‐
age, Parking Pilot and COMAND: When
driving in stop-s tart traf fic, the driver is sup‐
por tedby an extended, au tomatic restart in
traf fic jams.
RVe hicles with Driving Assistance Pack‐
age: Responds in urban speed ranges tosta‐
tionary vehicles (e xcept bicycles, mo torcy‐
cle sand pede strians) if conditions are suf fi‐
cient toenable de tection.
If yo ufa ilto adapt your drivin gst yle, 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
re sponsible forth e dis tance totheve hicle in
front, forve hicle speed, for braking in good time
and forst ay ing in lane.
If all activation conditions are met, you can act i‐
va te Dis tan ce Pil otDISTRONIC du ring a journ ey
or while stationar y.When Dis tance Pilot DISTRONIC is acti
vated, a speed is stored which
th e driver can increase or reduce at any time.
The speed can be adjus ted between 15mp h
(20 km/h) and 120mp h(2 00 km/h).
Ve hicles with
the Driving Assist
ancePack‐
age: The speed can be adju sted between
15 mp h (20 km/h) and 130mp h (2 10km/h).
Ve hicles with Driving Assistance Package,
Park ing Pilot and COMAND: Upto30 seconds
af te rst opping, theve hicle automatically follo ws
th eve hicle ahead without the inter vention of the
driver. This is only possible if theve hicle is tr av‐
eling on a free wayor ahigh-speed majo rro ad. If
an obs tacle is de tected in front of theve hicle
during the driving-off procedure, a take ove r
wa rning is given. Acceleration is reduced, the
driver is given a visual and acoustic warning and
must stop theve hicle before reaching the obs ta‐
cle or take eva sive action.
Ve hicles with the Driving Assistance Pack‐
age: In conjunction with navigation sy stems, Dis‐
ta nce Pilot DISTRONIC pr events prohibited over‐
ta king on theright at speeds over 50 mph
(80 km/h) in right-hand traf fic and overtaking on th
e left in left-hand traf fic on free ways and high-
speed major roads.
If yo u act ivate the turn signal indicator tochange
lanes, theve hicle will accelerate more briskly to
th e set speed under thefo llowing conditions:
RDis tance Pilot DISTRONIC is acti vated.
RIfth e driving speed is higher than 45 mph
(70 k
m/h).
RIf th e driven speed drops below thestored
speed.
RIf th e tra ffic situation in theove rtaking lane
permits a safe lane change.
Ve hicles with Driving Assistance Package
and Traf fic Sign Assis t:Distance Pilot
DI ST RO NIC also has the Speed Limit Pilot func‐
tion. This function can be confi gured inthe mul‐
timedia sy stem. If a change in the speed limit is
de tected and Dis tance Pilot DISTRONIC is acti va‐
te d, Dis tance Pilot DISTRONIC assumes this new
speed.
The driven speed is adap ted when theve hicle is
le ve l with the tra ffic signs. The speed limit dis‐
16 2
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play inthe Instrument Display is alw ays update d
when theve hicle is le vel with the traf fic sign.
If th e Dis tance Pilot DISTRONIC has been put
into passive modebypressing the accelerator
pedal, only speed limits which are higher than
th e set speed are adop ted.
Pulling the cruise control le ver will set the dis‐
pla yed speed limit as the speed, pr ovided that:
RThe Speed Limit Pilot has been activated in
the multimedia sy stem and
RDis tance Pilot DISTRONIC has been acti va‐
te d.
If no speed limit is displa yed when the le ver is
operated, the speed set bythe driver is adop ted.
Drive prog ram
The DYNA MIC SELECT switch allo wsyouto
ch ange the driving style of Dis tance Pilot
DISTRONIC. Depending on which drive program
is selected, the driving characteristics can be
ge ared towa rds fuel econom y,comfort or
dynamic per form ance (
→page 136). Sy
stem limits
Ve hicles with the Driving Assistance Pack‐
age: Distance Pilot DISTRONIC is acti veinthe
0 mp h (0 km/h) to130mp h (2 10km/h) speed
ra nge.
The sy stem may be impaired or may not function
in thefo llowing situations:
RIn sno w,rain, fog, heavy spr ay, if there is
gl are, in dir ect sunlight or in greatly varying
light conditions.
RIf th e windshield in the area of the camera is
dirty, fogged up, damaged or co vered.
RIfth era dar sensors are dirty or co vered.
Do not use Dis tance Pilot DISTRONIC in thefo l‐
lowing situations:
RIn road and traf fic conditions whi chdo not
allow youto maintain a cons tant speed, e.g.
in heavy traf fic or on winding roads.
ROn slippery roads. Braking or accelerating
can cause the drive wheels tolose traction
and theve hicle could then skid.
RWhen there is poor visibility, e.g. due tofog,
heavy rain or sno w.
RIn parking garage s or at tollst ations.
ROn roads with steep uphill or downhill gradi‐
ents.
Tips
Pa yparticula rattention in thefo llowing traf fic
situations. In such situations, brake if necessar y.
Dis tance Pilot DISTRONIC is then deactivated:
RWhen cornering, entering and exiting a bend.
RWhen not driving in the center of the lane.
RWhen other vehicles are changing lane.
RIfth ere are nar rowvehicles.
RIfth ere are obs tacles and stationary vehi‐
cles.
RIf th ere are crossing vehicles, pedestrians,
mo torcyc lists or cyclists.
Driving and parking 16
3
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Displayof Distance Pilo tDISTRONIC in the
assist ancegraphic and in the speedome ter
1Ve hicle ahead
2Dis tance indica tor
3Set specified di stance
4Own vehicle
1Speed of vehicle ahead
2Stored 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 50 mph (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 free ways or high-speed major roads the ç
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:
RTo people or animals.
RTostationary obstacles on thero ad, e.g.
st opped or par kedve hicles (vehicles with‐
out the Driving Assis tance Package).
RTo stationary obstacles 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).
RTo oncoming vehicles and crossing traf‐
fi c.
16 4
Driving and pa rking
Page 167 of 482

As aresult, Dis tance Pilot DISTRONIC may
nei ther give warnings nor inter vene in such
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:
RGi ve an unnecessary warning and then
brake theve hicle.
RNeither give a warning nor inter vene.
RAc celerate or brake unexpectedly.
#Continue driving wi thcare 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 inthese 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:
RIf th ere is a malfunction in the sy stem or
in the po wer supp ly.
RIf Dis tance Pilot DISTRONIC is deacti va‐
te d with the cruise control le ver,fo r
ex ample byave hicle occupant or from
outside theve hicle.
RIfth e electrics in the engine compart‐
ment, the battery or the fuses are tam‐
pered with.
RIf th e battery is disconnected.
RIfth eve hicle is accelerated, forex ample
by ave 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
unkno wnstored 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 parking 16
5
Page 168 of 482

#Take into account the tra ffic situation
before calling up thestored speed.
#If th estored speed is not known, store
th e desired speed again.
&
WARNING Risk of accident due tounex‐
pecte d 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.
RThis speed may be too high for a turning
lane or an exit lane.
RIf driving in theright lane, this speed may
be so high that you pass vehicles driving
on the left (in count ries where tra ffic
drives on theright).
RIf 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 tra ffic 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 unexpectedl y.
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, such as:
RInthewe t or in fog
RWhen towing a trailer
Ensure that the driven speed complies with
traf fic re gulations.
Re quirementsRThe vehicle's engine or must be switched on.
RThe electric parking brake must be released.
RPa rking Pilot is not being used topark the
ve hicle or toexit from a parking space.
RESP®must be switched on, but not inter ven‐
ing.
RThe transmission must be in positionD.
RThe driver door, front passenger door and the
re ar doors must be closed.
RThe engine hood must be closed.
16 6
Driving and pa rking