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____________________________________________ A_ d_ a...::p_ t _ iv_e_ C_ r_u _i_s _e _ C_o_ n_ t_r _o _l __ _
For examp le, if the interval DISTANCE 3 is set, a veh icle in front is
followe d at a
time in terval of 1. 8 seconds .
For a speed of
50 mph (80 km /h ) this would be equivalent to a
distance of
131 feet (40 meters ) to the vehicle in front.
Symbol Dynam ics
Distance at 25 mph (40 km/h)
Di stan ce at 50 mph (80 km/h )
Distance at 75 mph (120 km /h)
DISTANCE 1
c:::, _c:::, _ _ _
1 second
Sporting
36 Feet ( 11 Meters)
72 F eet ( 22 Mete rs)
108 F eet (33 Meters)
How your ve hicle responds w hen accelerating and fo llow ing other
vehicles with ACC opera ting can be adapte d to your pe rsonal wi shes
through different driving programs. Depending on wh ic h driving
prog ram and which d istance yo u choose, you r veh icle w ill respond
Settings
Symbol for time interval Support for :
Response in "dynamic " driving program
Response in "standard " driving program
Response in "comfort " driving program DISTANCE 1
c:::,_c:::, ___
Bu
m pe r-t o-b umper
tra ffic, brisk driving
1
2
3
(dynamic) 1 -----2 ----- 3 ----- 4 ----- 5 (comfortable)
Controls and equip
ment Safety first
The distances g
iven here are nom inal values. The vehicle speed may
excee d or f all shor t of these target speeds, depending o n the driving
situat ion and the dr iving style of the veh icle ahead .
DISTANCE 2
~ __ c:::, __
1.3 s eco nds
Standard
95 F eet ( 29 Mete rs)
14 4 Fee t (44 Meters)
DISTANCE 3
c:::, ___ c:::,_
1.8 second s
Standa rd
6 6 Feet (20 Meters)
13 1 Feet (4 0 Meters)
197 Feet (60 Meters)
DISTANCE 4
c:::, ____ c:::,
2.3 seconds
Comfo rtable
82 Feet (25 Meters)
16 7 F eet (51 Meters)
249 F eet (76 Meters)
more dynamically or more comfortably when accelerating and
bra king . The setting is se lec ted throug h the MM I menu
Adaptive
Cruise Control =>
page 149, "MMI settings".
DISTANCE 2 DISTANCE 3 DISTANCE 4
~--~--~---~-~----~
Bumper-to-bump er Bum per-to-b umper Secondary roads, tra iler
traff ic, " keeping pace" traff ic, "keeping pace" operat ion
comfortab ly comfortably
2 2 3
3
3 4
4 4 5
Vehicle care Technical data
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& WARNING
Following other v ehicles too clo sely increases the risk of a crash
and serious per sonal injury.
• Following other vehicles too closely, particularly at higher
speeds in crea ses the ri sk of collisions and seriou s personal injury.
• Setting short distances to the traffic ahe ad reduces the time
and distance avail able to bring your vehicl e to a safe stop and
makes it even more necessary to pay close attent io n to t raffic.
• Always select a speed and distance to traffic ahead that is safe
and appropriate under the pre vailing traffic, road , weathe r and
lighting conditions.
• Never rely on the distance control feature of ACC alone to
prevent rear-end collisions . Always be pr epared to brake and take
evasive action to a void collisions and other accident situations.
• Never allow the closing sp eed b etween you and other vehicles
to be so high that the Adapti ve Cruise Control may not be able to
s low your vehicle safely . If closing speed is too high, you must
apply the brakes yourself to reduce the r isk of a rear -end crash.
• Always select a greater following di stance to the vehicle ahead
on wet roads than on dry roads.
• Always read and h eed the information and WARNINGS=>
& in
"Description" on page 136.
(I] Tips
The distance setting is reset to the factory de fault DIS TANCE 3 the
next time the igni tion is t urn ed on .•
Driver information
Applies to veh icles: with Adapt ive Cruise Control
Displays in the instrument cluster
Depending on the driving situation, driver info rmation is
displayed in the instrument cluster.
@ Speedometer an d indicator lig ht disp lay
@ Display in the instrument cluster
Fig . 1 39 Ove rvi ew
in strum ent clu ster
@ Speedometer and indicator Light d isplay
Important information concerning vehicle operation w ith Adaptive
Cru ise Control is shown in d isp lay area @. The des ired speed yo u set
is indicated in the speedometer (LED lights around the edge).
T he in dicator lights show whe ther the system has detec ted a veh icle
traveli ng ahead .
@ Display in the instrument cluster
In display area ® informat ion from the navigation system * and the
t rip compu ter i s displayed in a dditio n t o info rmation abou t Ad aptive
Cru ise Contro l.
You ca n sele ct among the dif ferent informatio n by repeated brief
t aps on the!RESET)button on the windsh ield w ipe r leve r=>
page 27,
"Operation". .,.
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Certa in pieces of information in the bottom part of the display are not
shown permanent ly. Information is displayed only if you set or
change the speed setting, change the t ime interval, when messages
are displayed or if the Adapt ive Cruise Control is turned off for safety
reasons. •
Applies to veh icles: with Adaptiv e Cruise Contro l
Display in the speedometer
Desired speed
Fig . 140 Display in
the speedometer
Th e desired speed set by the driver is displayed by a red LED.
If the desired speed was set between two lines on the speedometer
using the
[SET) bu tton, the two closest light emitting diodes w ill
come on=> fig. 140.
The system allows only speeds to be set between 20 to 95 mph (30 t o 150 km/h) to be set. This speed range is fa int ly illumina ted in the
speedometer (LED lights).
Indicator lights (symbols)
• ""~ Open road: The indicator light""~ shows that ACC is active
and that no mov ing vehicle has been detected with in range of the
radar sensor up ahead in your lane of travel. The set speed is main
ta ined.
Con tro ls a nd e quip
m en t Vehicle
OP-eration •
~" "~ Driving in traffic:
The indicator light ~11 .. c::::., shows that a
vehicle moving in yo ur lane of travel has been detected up front in
your lane of travel. Your speed is adjusted accord ing to the speed of
the vehicle up front. ACC accelerates and brakes automatically within
the system's capabilit ies .
• ~" "~ Driver intervention prompt: The red flashing warning
light
c::::., 11 .. o::::::) means Request for driver to assume control. You as the
driver must slow the veh icle with the foot brake . T he symbol
~""o::::::)
tells you that the Adaptive Cruise Control is not able to slow the
vehicle down enough to keep a enough distance to the vehicle in front
of you. A warning tone will also sound when the symbol appears. For
more information about the driver intervention prompt=>
page 148.
& WARNING
Improper use of the Adaptive Cruise Control features and inatten
tion can lead to a crash and serious personal injury.
• Never allow the closing speed between you and other vehicles
to be so high that the Adaptive Cruise Control may not be able to
slow your vehicle safely. If closing speed is too high, you must
apply the brakes yourself to reduce the risk of a rear-end crash.
• Always select a greater following distance to the vehicle up
ahead on wet roads than on dry roads.
• Alway s read and heed the information and WARNINGS=>
& in
" Description" on
page 136.
[ i ] Tips
• If you use the accelerator to go faster than the speed of the
vehicle ahead of you, the driver intervention prompt will not be
accompanied by a warn ing to ne.
• If the speed yo u previously set is exceeded, the indica tor light in
the speedometer will switch off .•
Vehicle care Do-it-yourselt service iTechnical data
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Appli es to veh icles : wi th Adap tiv e Crui se Con tro l
Display in the instrument cluster
Fig. 141 Dis pl ay in
the instrum ent clu ster
Scroll throug h the available informa tion displays by briefly tapping
the
[ RESE T] button at the end of the windshie ld wiper lever . You can
select information from the tr ip comp uter, navigation sys tem * or
Adaptive Cr uise Control.
@ Vehicle symbol
@ Dis tance
© Status
© Vehicle symbol
Th e veh icle symbol i ndi cates w het her the sys tem has de te ct ed an
object traveling in front .
• Vehicle outline : Open road, no vehicle ahead .
• White vehicle : A vehicle is detected ahead.
• Red vehicle : Request for driver to ass ume control.
® Distance
Us ing the a rrows and scale, you can det ect how far it is to the vehi cle
in front of you.
• Open road : No ar row app ears when the ve hicle is o n an o pen road
and there is no ve hicle ahead.
• Driving in t raffic : If a vehicle is detected ahead, the arrow moves
on t he sc ale. The g ree n area represents the distan ce set . When
approaching slow ly, the arrow moves from the
gray zone to the green
zone on the scale .
• Driver intervention prompt: When appro aching rapid ly, the
arrow serves as an early warn ing signa l.
If the distance selected is
excee ded or poss ibly no t reache d, t he arrow moves in to the
red zon e
on t he scale. In certain dr iving s ituations , you as the driver wi ll have
t o take action =>
page 148, "Driver in tervent io n prompt".
@ Status
• T he text ACC OFF ap pears in wh ite le tters when Ad aptive Cr uise
Control is turned off .
• T he text
ACC AVAILABLE appears in wh ite lette rs when t he
system is turned on but no desired speed has been set .
• T he text
OVERRIDE appears in white l etters when you exceed the
desired speed by accelerating .
• T he text
DISTANCE! appears in red letters when the in terva l to a
vehicle traveling ahead is too short and you have to slow your vehicle
add itionally with the foot brake .
• T he te xt messages
DISTANCE 1 to DISTANCE 4 appea r in gree n
le tte rs to indicate the time interval you have se t and Adaptive Cruise
Con trol is in management mo de.
• If the driving program "standard" is replaced by "comfort" or
"dynam ic" usin g the M MI, the above text message is supp lemen ted
by an appropriate prom pt, e .g .
DISTANCE 1 -dyn .. •
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Adaptive Cruise Control I'll __________________________ ...:....:..;:_....;_,,!,_ ______ _
App lies to vehicl es: wi th Adaptive Cru ise Con trol
System status indicator
The text messages and symbols shown in this area of the
displ ay are not displayed permanently .
Time intervals (such as e::::, ____ e::::,)
Fig. 142 Sy stem
st atu s indicator
The d ifferent symbols for the time interva ls (distance) appear if you
change the settings~ fig . 142.
Thr ee wh ite dots .. . ap pear if a set ting c annot be made w ith the o pe r
ating lever . The following are possible reasons
• If you pull the control lever towa rds you to resume speed but no
requested speed was set .
• If you push the lever up to increase (or down to re d uce) speed
when no speed has been set previo usly .
• If yo u push the lever up to increase (o r down to red uce) spee d and
this speed is outside the 20 to 95 mph (30 to 150 km/h) speed ra nge .
ACC not available
The text message ACC not ava ilable appears, for examp le, if the
t empe ra tu re o f the brakes is excessive. Adap tive Cru ise Con trol is
temporar ily not avai lab le. A warning tone sounds as a reminder .
Controls and equip
ment Safety first
ACC not available !
Th
e text message ACC not available! appears in the event o f a
ma lfunction . Adaptive Cru ise Contro l is tur ned off .
A warn in g tone
so unds as a reminder. Have the system inspected by a q ualified dea l
ersh ip .
ACC sensor blocked !
The text message ACC sensor blocked ! appears w hen the ACC System
can no longer acc urately detect vehi cles movi ng up ahead in your lane
o f travel. Adaptive C ruise Cont rol is tu rned off. A wa rning tone a lso
so unds as a reminder .
T o decide w hethe r it is ne cess ary to switch off the ACC (ACC senso r
blocked
!) or if it is only a temporary condition (ACC Functionally
limited), the sys tem w ill also takes into considera tion the outside
temperature and/or the w indshield wiper operation .
T he ACC sensor is d irty or b locked (e .g . leaves, snow).
Th e ACC senso r is lo ca ted be hind t he a rea to the right o f th e front
license plate.
If the ACC sensor is dirty or blocked, clean the area to
restore sy stem o per ation.
ESP activation
T he text message ESP activation appears if the Electro nic St abil iz a
tion Program (ESP) has intervened. In this case the Adaptive Cruise
Con trol is au tomat ica lly tu rned off. This is accompan ied by a warn ing
tone.
Speed
The set speed in mph (Canada km/h) always appears when saving or
c hangi ng the speed in Ad aptive C ruise Cont rol~
page 14 0, "How is
the speed stored?" and~
page 140, "Changing stored speed" .
ACC functionality Limited
The message ACC functionality limited appears when the ACC
System does no t detec t any moving vehicles up a head in your lane of
trave l for a longer period of time. Dur ing t his time, the d istance to
movi ng ve hicles in you r lan e of tra ve l up ahead i s not being m ain-
~
Vehicle care Technical data
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tained. The ACC system is not switched off, and increased attention
to the traffic situation is absolutely necessary. The followi ng may be
reasons why the message
ACC functionality limited appears:
• The ACC sensor is dirty . The ACC system is not reacting, or is not
reacting correctly, to moving vehicles up ahead in yo ur la ne of travel.
• There may be very light traffic on and there is nothing that marks
the side of the road (for example , guard rai ls, traffic signs, trees). As
soon as a moving vehicle up ahead is detected aga in, ACC becomes
active again and the message disappears.
The ACC sensor is located behind the area to the right of the front
license plate.
If the ACC sensor is dirty or blocked, clean the area to
restore system operation .
Parking brake !
The text message Parking brake! appears, when the parking brake is
applied. ACC is turned off. A warning tone so unds as a reminder.
Stationary object ahead
The text message Stationary object ahead appears, when you want
to activate the system and there is a stationary vehicle or an object
immediately in front of you.
Gradient too steep
The text message Gradient too steep appears when the max imum
gradient for proper ACC operation has been exceeded. Adaptive
Cru ise Control is turned off . A warning tone also sounds as a
reminder.
ACC off: manual control !
The text message ACC off: manual control! appears after the vehicle
has been brought to a standst ill by the Adapt ive Cruise Control. In
this case you must depress the brake pedal to prevent the vehicle
from rolling . A warn ing tone sounds as a reminder.
Selector lever position I
Th e text message Selector lever position! appears when the selector
lever is moved to position
N. In th is position, Adaptive Cruise Cont rol
is not available. •
Applies to vehicles : w it h Adap tiv e Cru ise Control
Driver intervention prompt
The driver intervention prompt calls on the driver to take
over the situation.
Fig . 143 I nstrument
cluster: Driver inter·
vention prompt
In certain situations, the brak ing power of the Adaptive Cruise
Control is not enough to maintain an adequate distance to the vehicle
up ahead. In these situations, the Adaptive C ruise Control calls the
driver to take action.
The
driver intervention prompt a lerts you vis ually and aud ibly to take
over .
• A red vehicle is shown in the instrument cluster display
:::::, fig. 143.
• T he text
DISTANCE! appears in the status line.
• The indicator light
<::::>11, ,~ in the speedometer blinks red .
• A warning tone sounds.
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[I) Tips
• Adaptive Cru ise Control is sw itched off after pressing the foo t
brake . The speed saved up this poi nt can be resumed.
• T o resume the saved speed, release the brake pedal and p ress the
control lever~
page 141, "Turning Adaptive Cruise Control off
temporar ily ".
• If you use the accelerato r to go faster than the speed of the
vehicle ahead of you, the driver intervention prompt will not be
accompanied by a warning signal.
• If the speed you prev iously set is exceeded, the indicator light in
the speedometer will switch off. •
Appli es to vehi cles : w ith A dap tive Cru ise Cont rol
MMI settings
Individual settings for Adaptive Cruise Control c an be
selected in the MMI.
Settings for t he Driving program ca n be adjusted ind ividually
to the par ticu lar user and save d in the MMI. Th is can only be
done with the engi ne r unning .
- Sele ct : F unc tion b utt on
I C A R]> Systems* > adaptive
cruise control
> Driving program .
Setting the driving program
In the Driving program menu you can ad just the characteristics o f
Ad aptive Crui se Con trol to yo ur own preferences u sing Dynamic ,
Standard or Comfort .
Saving settings
Your individ ual sett ings are automatica lly saved and ass igned to the
remote con trol key being used (remote key sto rage) . If the key is
given to anothe r person, t he saved sett ings rema in as they are. •
Controls and equip
ment Safety first
System Limitations
App
lies to ve hicle s: with Adap tive C ru ise Co ntro l
General information
The radar sensor has limits that the driver must kno w to
be a ble t o use ACC proper ly.
Th e Ad apt ive Cr uise Con trol works wi thin limi ts th at a re also rela ted
to radar sensor range and sight distance. In some situations ACC may react unus ually or late from the drive r's point of view. Therefore,
always be atte ntive to what is happe ning around you and always be
ready to interve ne, if necessary:
• when driving aro und curves ~
page 150
• when ve hicles up front are not in line wit h your vehicle
~ page 15 0
• when other ve hicles are changing lanes~ page 150
• when other vehicles are difficult to detect~ page 151
• when ve hicles up ahe ad are not mov ing o r o bst acle s ar e in you r
trave l lane ~
page 151
& WARNING
The radar sensor's function and range can be reduced by rain , snow
and heavy spray . Moving vehicles up ahead may not be promptly
detected or may not be detected at all.
• Always pay careful attention to the traffic situation and be
ready to intervene and be ready to take complete control when
ever necessary .•
Vehicle care Technical data
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Applies to veh icles : with Adapt ive C ruise Contro l
When driving around curves
Entering a curve
Fig. 144 Vehicle
entering a curve
Fig. 145 Vehicle
leaving a curve
When entering a curve, the Adaptive Cruise Control may react to a
vehicle in the next lane and apply the brakes in your vehicle
::;, fig. 144. The braking action can be overridden by depressing the
accelerator pedal.
Leaving a curve
At the end of very long curves, AC C's predictive lane reading can cause
ACC to react to another vehicle in the next lane and apply the brakes
on your vehicle::;, fig. 145. The braking action can be overridden by
depressing the accelerator pedal. •
Applies to veh icles : with Adaptive Cruise Control
Vehicles offset to one side
i
----------------- .. i
Fig. 146 Vehicle trav
eling ahead outside
the detection range of
the radar sensor
Vehicles moving up ahead but offset in the lane cannot be detected
by ACC until they are in sensor range.•
Applies to veh icl es: with Adapt ive Cruis e Contro l
Lane changes by other vehicles
Fig. 147 A vehicle
changes lanes
Vehicles that cut into your lane a short distance in front of you cannot
be detected by ACC until they are in sensor range .•