Page 121 of 350

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a short time in the Information line
¢ page 124.
@ Tips
For safety reasons, the stored speed is
erased when the ignition or the ACC is
turned off.
Changing stored speed
Applies to vehicles : with adapt ive cruise control
The speed can be changed without touching
the accelerator or brake p edal .
Fig. 133 Contro l le ve r: Ch anging speed
Inc re as ing speed
• Press the leve r briefly upwards 0
9 fig . 133. USA models: the speed increases
by about 2.5 mph . Canada models : speed
will increase by one mark on the speedome
ter sca le .
• Press the lever upwards
0 and hold it . As
long as you ho ld the control switc h down,
the lig ht diode display in t he speedome ter
L E D display in the speedometer moves for
ward and the speed is increased.
R educing speed
• Press the lever briefly downwards Q . USA
models: the speed decreases by 2.5 mph .
Canada models: speed w il l decrease by one
mark on the speedometer scale.
• Press the lever downwards
O and hol d it.
As long as you hold the control sw itch down,
the lig ht diode display in the speedometer
LED display moves ba ckward and the speed
is reduced .
After releasing the control switch, the system regulates the speed to the va lue just set.
Ad apti ve crui se control 119
After each adjustment, the newly-set speed is
shown for a short time in the Information line
9 page 124.
_& WARNING
Improper use of the adaptive cruise con
trol features and inattent ion can lead to an
accident causing ser ious personal injury.
- It is dangerous to use the "RES UME" fea
ture when the prev iously set speed is too
high for existing road, traff ic or weather
conditions.
- Always read and heed the information
and WARNINGS
¢.&. in Description on
page 115 .
(D Tips
You can increase your speed at any time by
stepp ing on the accelerato r pedal. After
you release the acce lerator pedal, the sys
tem adjusts back down to the speed you
p reviously set . A new desired speed can be
stored a t any time by press ing the
!SE TI
b utton 9page 118, fig. 132 .
-
Page 122 of 350

120 Adaptive cruise control
Turning adaptive cruise control off
temporarily
Applies to vehicles: with adaptive cruise co ntrol
In some situations it makes sense to turn
adaptive cruise control off temporarily.
®
Fig. 134 Con tro l lever : Turning adaptive cruise co ntro l
off tempo rarily
Fig. 135 D isplay in the speedomete r
Turning control off temporarily
"To shut off the control with the save func
tion, either depress the brake pedal, or
" Press the lever in the direction of the arrow
@ qfig .134.
How is the distance (time interval) set?
Ap plies to vehicles: with adaptive cruise co ntrol
Distance can be set in four stages.
Fig. 136 Contro l lever: Setting d istance
Reactivating control
"To resume the speed and distance control,
release the brake pedal and press the lever
in the direction of the arrow@.
Display in the speedometer
@ Current vehicle speed~ fig. 135
@ Saved speed
As long as a speed is saved the set desired
speed will be displayed in the LED display in
the speedometer by one or two illuminated
red light diodes . When the control function is
resumed the adaptive cruise control acceler
ates to reach the desired speed if no slower
vehicle ahead is detected.
&_ WARNING
Improper use of the adaptive cruise con
trol can cause collisions, oth er accidents
and serious personal injuries.
- Never resume the stored speed if the
speed is too high for prevailing road,
traffic or weather conditions .
(0 Tips
When the system is turned off temporari
l y, the speed set at that time is stored.
Increasing distance
-
" Push the slider switch once to the right 0
q fig. 136 . The distance current ly set is
shown for 3 seconds in the instrument clus
ter display.
" Push the slider switch
again to the right 0
to increase the distance by one step. ..,.
Page 123 of 350

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Reducing distance
"' Push the slider switch once to the left 0-
The distance currently set is shown for 3
seconds in the instrument cluster display.
"' Push the slider switch
again to the left 0 to
decrease the distance by one step.
The distance at which the adaptive cruise con
trol follows a vehicle in front is determined by
time intervals. A time interval to a vehicle in
front is estab lished and maintained. Th is pro
duces a speed-dependent interval. The higher
the speed, the greater the safety interva l in
feet (meters)
¢ ,&. .
DISTANCE 1
Symbol s::::, _s::::, ___
Time interval 1 second
Dynamics Sporting
Adaptive cruise control 121
For example, if the interval DISTANCE 3 is
set, a vehicle in front is fo llowed 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.
T he distances given here are nominal values .
T he vehicle speed may exceed or fall short of
these target speeds, depending on the driving
situation and the driving style of the vehicle
ahead .
DISTANCE 2 DISTANCE 3 DISTANCE4
s::::,_ -s::::, _ - s::::,
__ -s::::, _
s::::,_ - -_s::::,
1.3 seconds 1.8 seconds 2.3 seconds
Standard Standard Comfortable
Distance at 25 mph 36 Feet (11 Me- 46 Feet ( 14 Me- 66 Feet (20 Me- 82 Feet (25 Me-
(40 km/h ) ters) ters) ters) ters)
Distance at 50 mph 72 Feet (22 Me-
95 Feet (29 Me- 131 Feet (40 167 Feet (51
(80 km/h) ters) ters)
Meters) Meters)
Distance at 75 mph 108 Feet (33 144 Feet (44 197 Feet (60 249 Feet (76
(120 km/h) Meters) Meters) Meters) Meters)
How your vehicle responds when accelerating
and following other ve hicles w ith ACC operat
ing can be adapted to your personal wishes
through different driving programs. Depend
in g on wh ich driving program and wh ic h dis- tance you choose, your vehicle will respond
more dynamically or more comfortably when
accelerat ing and braking . The setting is se
lected through the MMI menu
adaptive cruise
control¢
page 126, MMI settings .
Settings DISTANCE 1 DISTANCE 2 DISTANCE 3 DISTANCE4
Symbol for time inter-
val
s::::,_ s::::, _ -- s::::,
__ s::::,_ - s::::,
___ s::::,_
s::::, _ - -_s::::,
Support for: Bumper-to- B umper-to -Bumper-to-
Secondary roads,
bumper traffic, bumper traffic, bumper traffic, trailer operation
brisk driving "keeping pace" "keeping pace"
comfortably comfortably
Response in "dynam-
1 2 2
3 ic" driving program
Response in "stand-
2 3 3 4 ard" driving program
Response in "comfort "
3 4 4 5 driving program
(dynamic) 1 -----2 ----- 3 ----- 4 ----- 5 (comfo rtable)
Page 124 of 350

122 Adapti ve crui se control
A WARNING
Following ot her vehicles too closely in
creases the risk of a crash and serious per
sonal injury .
- Following other vehicles too closely, par
t icularly at higher speeds increases the
risk of collis ions and serious pe rsonal in
Jury.
- Setting short distances to the traffic
ahead reduces the time and distance
available to br ing you r vehicle to a safe
stop and makes i t even mo re ne cessary
to pay close attention to traffic.
- Always select a speed and distance to
traffic ahead that is safe and appropr iate
under the prevailing traff ic, road, weath
er and Lighting conditions .
- Never re ly on the dis tance control fea
ture of ACC a lone to p reven t rear -end col
lisions. Always be prepared to brake and
take evasive act ion to avoid co llisions
and other acc ident situations.
- Never allow the closing speed between
you and other vehicles to be so h igh that
the adaptive cruise control may not be
able to slow your vehicle safe ly. If clos
ing speed is too high, you must apply the
brakes yourself to reduce the risk of a
rear-end c rash.
- Always select a g reater following dis
tance to the veh icle ahead on wet roads
than o n dry roads.
- Always read and heed the information
and WARNI NGS
9 .&. in Description on
page 115.
(0 Tips
The distance setting is reset to the factory
default
DISTANCE 3 the next time the ig
nition is turned on.
Driver information
Displays in the instrument cluster
Applies to veh icles: w ith adaptive cruise contro l
Depending on the driving situation, driver in
formation is displayed in the instrument clus
ter .
Fig . 1 37 Overv iew ins tr u me nt cluster
@ Speedometer and indica to r Li ght d isp lay
@ Display in the instrument cluster
@ Speedometer and indicato r light
display
Important information concerning vehicle op
eration with adaptive cruise control is shown
i n display a rea @. The desired speed you set is
i ndica ted in the speedome ter (LED lights
aro und t he ed ge).
T he ind icator Lights show whether the system
has detected a vehicle trave ling ahead .
@ Display in the in strument cluster
In display area@ information from the navi
gation system* and th e tr ip computer is dis
played in addition to informat ion about adap
t ive cru ise control.
You can select among the different informa
t io n by repeated brief taps o n the
I RESET I but
ton on the w indshie ld w iper Lever
9 page 25,
Operation .
Certain pieces of information in the bottom
part of the display are not shown permanent
ly . Information is displayed only if you set or
c h ange the speed setting, change the time in
te rva l, when messages are disp layed or if the
adaptive cruise co ntro l is turned
off for safety
r easons .
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Display in the speedometer
Applies to vehicles: with adaptive cruise control
Fig. 138 D isplay in the speedomete r
Des ired spe ed
The desired speed set by the driver is dis
p layed by a red LED.
If the desi red speed was set between two
lines on the speedometer using the
I SETI but
ton, the two closest light emitting diodes will
come on <=>
fig. 138.
The system a llows only speeds to be set be
tween 20 to 95 mph (30 to 150 km/h) to be
set. This speed range is faint ly illuminated in
the speedometer (LED lights).
Ind icator lights (symbols )
-- Open road :
The indicator light_
shows that ACC is act ive and that no moving
vehicle has been detected with in range of the radar sensor up ahead in your lane of
travel. The set speed is maintained.
- - Driving in traff ic: The ind icator
light - shows that a vehicle moving in
your lane of travel has been detected up
front in your lane of travel. Your speed is ad
justed according to the speed of the vehicle
up front . ACC accelerates and brakes auto
matically within the sys tem's capabilit ies .
-- Driver int ervention prompt: The
red flashing warning light- means
Request for driver to a ssume control. You
as the dr iver must s low the vehicle with the
f oot brake. The symbo l-t ells you
t h at the adaptive c ruise co ntrol is not able
to slow the vehicle down enough to keep a
enough distance to the ve hicle in front of
you. A warning tone will a lso sound when
Ad apti ve crui se control 12 3
the symbol appears. For more information
about the driver intervention prompt
r::!) page 126.
_& WARNING
Improper use of the adaptive cruise con
trol feat ures and inattent ion can lead to a
crash and ser ious pe rsonal inju ry.
- Never a llow the closing speed between
you and othe r vehicles to be so high that
the adaptive cruise cont ro l may not be
ab le to slow yo ur vehicle safely. If clos
ing speed is too high, you must apply the
brakes yo urself to reduce t he ris k of a
rear-e nd crash.
- Always sele ct a greate r followi ng d is
tance to the vehicle up ahead on wet
roads t han on d ry roads.
- Always rea d and h eed t he i nfo rmation
an d WAR NINGS <=>
& in Desc rip tio n on
page 115 .
(D Tips
- If you use t he accelerator to go faste r
t han t he speed of the vehicle ahead o f
yo u, the dr iver in tervention prompt will
not be accompa nied by a warn ing tone.
- I f the speed you previ ously set is exceed
ed, the indic ator light in the s peedome
ter wi ll swi tch off.
Display in the instrument cluster
Appl ies to vehicles: wit h adaptive cruise control
Fig. 139 Disp lay in the inst rument cluster
-
Scroll through the availabl e information dis
p lays by br iefly tapp ing the
I RESET ! button at
the en d of the windshield wipe r leve r. Yo u can ..,.
Page 126 of 350

124 Adaptive cruise control
select information from the trip computer,
navigation system* or adaptive cruise control.
@ Vehicle symbol
@ Distance
© Status
@Vehicle symbol
The vehicle symbol indicates whether the sys
tem has detected 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 assume
control.
@ Distance
Using the arrows and scale, you can detect
how far it is to the vehicle in front of you.
- Open road: No arrow appears when the ve
hicle is on an open road and there is no vehi
cle ahead.
- Driving in traffic: If a vehicle is detected
ahead, the arrow moves on the scale. The
green area represents the distance set.
When approach ing slow ly, the arrow moves
from the
gray zone to the green zone on the
scale .
-Driver intervention prompt : When ap
proaching rapidly, the arrow serves as an
early warning signal. If the d istance select
ed is exceeded or possibly not reached, the
arrow moves into the
red zone on the scale.
In certa in driving situations, you as the driv
er w ill have to take action
c::> page 126, Driv
er intervention prompt.
@Status
- The text ACC: Off appears in white letters
when adaptive cruise control is turned off.
- The text
ACC: Standby appears in white let
ters when the system is turned on but no
desired speed has been set.
- The text
ACC: override appears in white let
te rs when you exceed the desired speed by
acce lerat ing. - The text
D
ISTANC E! appears in red letters
when the interva l to a vehicle traveling
ahead is too short and you have to slow your
veh icle additionally with the foot brake.
- The text messages
DISTANCE 1 to DIS
TANCE
4 appear in green letters to indicate
the t ime interval you have set and adapt ive
cruise control is in management mode.
- If the driving program "standard" is re
placed by "comfort" or "dynam ic" using the
MMI , the above text message is supple
mented by an appropriate prompt, e.g.
DIS
TANCE
1 -dyn .
System status indicator
Applies to vehicles : wi th adap tive c ruise contro l
The text messages and symbols shown in this
area of the display are not displayed perma
nently.
Fig. 140 System status indicator
Time intervals (such as.::::::, ____ .::::::,)
The different symbols for the time intervals
(distance) appear if you change the settings
c::> fig. 140 .
Three white dots ... appear if a setting cannot
be made w ith the operating lever. The follow
ing are possible reasons
- If you pull the cont ro l lever towards you to
resume speed but no requested speed was
set.
- If you push the lever up to increase (or down
to reduce) speed when no speed has been
set previously.
- If you push the lever up to increase (or down
to red uce) speed and this speed is outs ide
Ill>
Page 127 of 350

the 20 to 95 mph (30 to 150 km/h) speed
range .
ACC: Unavailable
The text message ACC: Unavailable appears,
for example, if the temperature of the brakes
i s excessive. Adaptive cruise control is tempo
rarily not available. A warning tone sounds as
a reminder .
ACC: Not available
The text message ACC: Not available appears
in the event of a malfuncti on. Adaptive cruise
control is turned
off . A warning tone sounds
as a reminder. Have the system inspected by a
q ua lified dealership.
ACC: Sensor blocked
The text message ACC: Sensor blocked ap
pears when the ACC System can no longer ac
curately detect vehicles moving up ahead in
your lane of travel. Adaptive cruise control is turned
off. A warning tone also sounds as a re
minder.
To decide whether it is necessary to switch
off
the ACC (ACC : Sensor blocked) or if it is only a
temporary condition (ACC functionality limit
ed) the system will take into cons ideration the
outside temperature and/or the windshield
operat ion.
The ACC sensor is dirty or blocked (e.g. leaves,
snow).
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 re
store system operat ion.
ACC off: Manual control!
The text message ACC off: Manual control!
appears after the ve hicle has been brought to
a standstill by the adaptive cruise control. In
this case you must depress the brake peda l to
prevent the veh icle from rolling. A warn ing
"" tone sounds as a reminder.
N
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,...., ..,., ,....,
Adaptive cruise control 125
Stabilization control (ESC)
The text message Stabilization control (ESC)
appears if the Electronic Stabilization Control
(ESC) has intervened . In this case the adaptive
cruise control is automatically turned
off . This
is accompanied by a warn ing tone.
Speed
T he set speed in mph (Canada km/h) always
appears when saving or changing the speed in
adaptive cruise control
¢ page 118, How is
the speed stored?
and r::!) page 119, Changing
stored speed.
ACC functionality limited
T he message ACC functionality limited ap
pears when the ACC System does not detect
any moving vehicles up ahead in yo ur lane of
trave l for a longer period of time. During this
time, the distance to moving vehicles in your
lane of travel up ahead is not being ma in
ta ined . The ACC system is not switched off,
and increased attention to the traffic situation
is absolutely necessary. The following may be
reasons why the message
ACC functionality
limited
appears :
- The ACC sensor is d irty . The ACC system is
not react ing, or is not reacting correctly, to
moving vehicles up ahead in your lane of
t ravel.
- There may be very light traffic on and there
is nothing that marks the side of the road
(for examp le, guard ra ils, traffic signs,
trees). As soon as a moving vehicle up ahead
is detected again, ACC becomes active again
and the message disappears.
T he ACC sensor is located be hind the area to
the right of the front license plate. If the ACC
senso r is dirty or blocked, clean the area to re
store system operation.
Parking brake!
T he text message Parking brake! appears,
when the parking brake is applied. ACC is
turned
off . A warning tone sounds as a re
minder.
Page 128 of 350

126 Adaptive cruise control
Stationary object ahead
The text message Stationary object ahead ap
pears, 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
contro l is turned
off . A warning tone also
sounds as a reminder.
Shift lever position!
The text message Shift lever position! ap
pears when the selector lever is moved to po
sition
N . In this position, adapt ive cruise con
trol is not ava ilab le .
Driver intervention prompt
Applies to vehicles: with adaptive cruise co ntrol
The driver intervention prompt calls on the
driver to toke over the situation.
Fig. 141 I n st rument clus te r: Drive r in terven tion
p romp t
In certain situations, the braking power of the
adapt ive cr uise control is not enough to main
tain an adequate distance to the vehicle up
ahead. In these situations, the adaptive cruise
control calls the driver to take action.
The
driver intervention prompt alerts you vis
ually and audib ly to take over.
- A red vehicle is shown in the instrument
cluster display ~
fig. 141 .
- The text DIS TANCE! appears in the status
line. -
The indicator light- in the speedome
ter blinks red.
- A warning tone sounds.
0) Tips
-Adaptive cruise control is switched off af
ter pressing the footbrake. The speed
saved up this point can be resumed.
- To res um e the saved speed , release the
brake pedal and press the control lever
~ page 120, Turning adoptive cruise
control off temporarily .
-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 s ignal.
- If the speed you previously set is exceed
ed, the indicator light in the speedome
ter will switch
off.
MMI settings
Applies to vehicles : with adaptive cruise contro l
Individual settings for adoptive cruise control
con be selected in the MMI.
Settings for the Driving program can be ad
justed individually to the particular user and
saved in the MMI. This can only be done with
the engine running .
.,. Select:
!CAR I function button> Systems*
cont ro l button > adaptive cruise control >
Driving program. Or
.,. Select: !CAR I function button > Car systems *
control button > Driver assist > Adaptive
cruise control
> Driving program .
Setting the driving program
In the Driving program menu you can ad just
the characteristics of adaptive cruise control
to your own preferences using
Dynamic,
Standard
or Comfort .
Saving settings
Your individual settings are automatically
saved and assigned to the remote control key
being used (remote key storage) . If the key is ..,_