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____________________________________________ A_ d_ a___,_ p_t_ i_v _e _ c_r _u _ i_ s _e _ c_o _ n_ t_r _o _l _ __.lft'I
App lies to veh icles : w ith a dapt ive cruise contro l
How is the speed stored?
Fig. 1 17 Contro l
l eve r: S tori ng s pee d
With th e sys te m switched on the speed is stored as follows:
- Drive at the speed you want . The speed must be between
20 and 95 mph (30 and 150 km/h) .
- Press the
!SET I button ~ fig . 117 to store the desired
speed .
After the ( SETI button is released, the current speed is stored and
m ain tained .
The saved speed is now shown in th e LED d isplay in the speedom et e r
by one or two illuminated red light diodes=>
page 123. At the same
time, the saved speed is a lso shown fo r a short time in the Info rma
tion line~
page 125 .
(I) Tips
For safety reasons, the stored speed is deleted when the ignition is
turned off .•
Con tro ls a nd e quip
m en t Vehicle
OP-eration
Applies to vehicles : w ith ada ptive cru ise cont ro l
Changing stored speed
The speed can be changed without touching the acceler
ator or brake pedal.
Increasing speed
,... 0
~
ill
Fig . 1 18 Con trol
l e ver: Chan ging spee d
- Press the lever briefly upwards 0 ~ fig. 118 . USA
models : the speed increases by about 2.5 mph . Canada
models : speed will increase by one mark on the speedom
eter scale .
- Press the lever upwards
0 and hold it . As long as you hold
the control switch down, the light diode display in the
speedometer LED display in the speedometer moves
forward and the speed is increased .
Reducing speed
- Press the lever downwards briefly Q. USA models : the
speed decreases by 2 .5 mph . Canada models: speed will
decrease by one mark on the speedometer scale . _,.
Vehicle care Do-it-yourselt service iTechnical data
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1111..__A_ d_a_ p,__ t_i v_ e_ c_r _ u _i _ s _e _ c_o _n _ t_ r_ o_ l ___________________________________________ _
-Press the lever downwards Q and hol d it. As long as you
hold the control switch down, the light diode display in the
speedometer LED display moves backward and the speed
is reduced.
After releasing the control switch, the system regulates the speed to
the value just set.
After each adjustment, the newly-set speed is shown for a short time
in the Information line~
page 125.
[ i ] Tips
You can increase your speed at any time by stepping on the acceler
ator pedal. After you release the accelerator pedal, the system
adjusts back down to the speed you previously set. A new desired
speed can be stored at any time by pressing the [SET] button
~ page 119, fig. 117 . •
Applies to vehicles: with adaptive cruise control
Turning adaptive cruise control off
temporarily
In some situations it makes sense to turn adaptive cruise control off temporarily.
Fig. 119 Co ntrol
lever: Turning adaptive
cru ise control off
temporarily
Turning contro l off temporaril y
-To shut off the control with the save function, either
depress the brake pedal, or
- Press the lever in the direction of the arrow @~fi g. 119.
Reactivating control
- To resume the saved speed, release the brake pedal and
press the lever in the direction of the arrow
(D .
& WARNING
Im pro per u se of the ad apti ve crui se co ntro l ca n ca use co llisions,
o th er acci dents a nd se rious perso na l inju ri es. Ne ver resu me th e
s t o red sp eed if the s pee d i s too high fo r pr eva ilin g road, t ra ffi c o r
weathe r co ndi tions.
lil Tips
When the system is turned off temporarily, the speed stored at the
time is retained. •
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____________________________________________ A_ d ___ a~p _t __ i_ v _e_ c_r_u _ i_ s _e_ c_o_ n_ t_r _o _l __ _
Appli es to ve hicl es: wi th a daptive cruise cont rol
How is the distance (time interval) set?
Distance con be set in four stages.
m 0 [;; ,.: 00 a,
Fig . 120 Control
l ever : Sett ing distance
-Push the slider switch once to the right 0 or to the left Q
~ fig. 120. The distance currently set is shown for 3
seconds in the instrument cluster display.
Push the slider switch again to the right 0 or to the left
Q to increase or to decrease the distance by one step.
Select distance
The distance at which the adaptive cru ise control follows a vehicle in
front is determined by
time intervals . A time interval to a vehicle in
front is estab lished and maintained. This produces a speed-depen
dent interval. The higher the speed, the greater the safety interval in
yards (meters) ~
&-
Th e distances provided are specified values. These distances may
exceed or fall short of these target distances, depending on the
driving situation and the driving style of the vehicle ahead.
Distance 1 ~-~ ---
Thi s sett ing is ideal for brisk driving i n bumper-to-bumper traffic. The
distance is one second. This is the equivalent of, for instance,
• a distance of 36 feet (11 meters) at a speed of 25 mph (40 km/h)
Controls and equip
ment Safety first
•
a distance of 72 feet (22 meters) at a speed of 50 mph (80 km/h)
• a dist ance of 108 feet (33 meters) at a speed of 75 mph (120
km/h)
Distance 2 ,;::::,-- ~--
This setting is ideal for "keeping pace" comfortably in bumper-to
bumper traffic. The distance is 1.3 seconds. This is the equ ivalent of,
for instance,
• a distance of 46 feet (14 meters) at a speed of 25 mph (40 km/h)
• a dista nce of 95 feet (29 meters) at a speed of 50 mph (80 km/h)
• a distance of 144 feet (44 meters) at a speed of 75 mph ( 120
km/h)
Distance 3 ~--- ~-
This setting is idea l for "keeping pace" in bumper-to-bumper traffic
and is the equivalent of the generally recommended distance that is
"half of the speedometer speed" . The distance is 1 .8 seconds. This is
th e equivalent of, fo r instance,
• a distance of 66 feet (20 meters) at a speed of 25 mph (40 km/h)
• a distance of 131 feet (40 meters) at a speed of 50 mph (80 km/h)
• a distance of 197 feet (60 meters) at a speed of 75 mph (120
km/h)
Distance 4 ~---- ~
This sett ing is ideal for secondary road traffic. The distance is 2.3
seconds. This is the equivalent of, for instance,
• a distance of 82 feet (25 meters) at a speed of 25 mph (40 km/h)
• a distance of 167 feet (51 meters) at a speed of 50 mph (80 km/h)
• a distance of 249 feet (76 meters) at a speed of 75 mph (120
km/h)
You can set the way your vehicle performs in ACC mode when acce ler
ating and braking in the radio or in MMI*
~ page 127. Depending on
the driving program and distance you select , you r veh icle's accelera-
tion and braking can range from dynam ic (1) to comfortable (5) . _,.
Vehicle care Technical data
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-Adaptive cruise control .Ml..___,___ _____________ _
Driving pro
gram
Dis tance 1
Distance 2
Distance 3
& WARNING
dynamic
1
2
2
3
standard
2
3
3
4
comfort
3
4
4
5
-
When setting the distance, the dri ver is responsible for adhering
to the respect ive national and country -specific regulations .
• Following other vehicles too closely increase s the risk of colli
sions and serious personal injury.
• Setting short distance s to the traffic ahead reduce s the time
and d istanc e av ailable to bring your vehicle to a safe stop and
makes it even more neces sary to pay clo se attention to traffi c.
• Always use good judgment and select a safe following distance
for the traffic , road and weather condition s.
(I] Tips
The d istance setting is reset to the factory default DISTANCE 3 the
next time the ignition is t urned on .•
Driver information
Ap plies to veh icles: w it h ad aptiv e c ru is e co ntro l
Displays in the instrument cluster
Depending on the driving situation, driver information is
displayed in the instrument cluster.
Fig. 1 21 O verv iew i nstrum ent clu ste r
© Speedomete r and indicator light disp lay
@ Display in the ins trument cluste r
© Message in the instr ument cluster disp lay
© Speedometer and indicator light d isplay
Important informa tion concerning vehicle ope ration wi th adap tive
cruise control is shown in display area@. The desired speed you set
is indica ted in the speedome ter (L ED ligh ts aro und the edge).
T he indicator lights show whether the system has detected a veh icle
traveling ahead . .,,.
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Adaptive cruise control -____________ __._ __ _
@ Display in the instrument cluster
In disp lay area @ information from the navi gation system * and the
tr ip computer is displayed in add it ion to informa tion about adaptive
c ruise contro l.
You can sele ct among the differe nt info rmatio n by repeated b rief
taps on the
I RESET! button on the winds hield w iper lever => page 23,
"Operat io n".
© Status indicator
Th e info rmation i n area © is no t disp layed per manently. Infor mat ion
is d isplayed o nly if yo u set or c hange the speed setting, change the
ti me in terva l, when messages a re displayed or if the ad apt ive cru ise
cont rol is turned off for safety reasons. •
Appli es to vehicles : w ith a daptive cruise c on tro l
Speedometer and indicator light display
----
- -
- -
@ ®
Desired speed
- -
--
Fig . 122 I nstru ment
cl uste r: Indicator light
T he desired speed set by the driver is displayed by a red LED in the LED
disp lay in the spee dometer.
If the desi red s peed was set be twee n two lines o n the speedo mete r
using the
[ SET J button, the two closest light diodes will come on
=>
page 122, fig. 121.
Controls and equip
ment Safety first
T
he system allows only speeds from 20 to 95 mph (30 to 150 km/ h)
t o be se t. T his spee d range is f aint ly ill um inat ed in t he s pee dome ter
(LED lights) .
Indicator lights (symbols)
• © Open road: The indicator light shows t hat adaptive cruise
co ntrol is a ctive and t hat no objec t is ahe ad of the vehi cle. A sto red
speed req uested is maintained.
• @
Driving in traffic : The indicator l igh t ind icates th at an object
has been detected traveling in front . Your speed is ad justed according
t o the spee d of t he vehicle in front. The adaptive c ruise con trol accel
erates and bra kes au tomatically w it hin the system's operat io n
parame ters.
• ©
Driver intervention prompt : The red flashing warning light
me ans
Request for driver to as sume control. You as the drive r m ust
slow t he ve hicle w ith the foot brake . The symbo l tells yo u that the
adaptive cruise contro l is not able to s low the vehicle down enough to
keep a enough distance to the vehicle in front o f you. An war ning tone
wi ll also so und when the symbol ap pears. Fo r more informat ion
abou t the driver intervent ion prompt=>
page 126 .
W Tips
• If you use the ac cele rator to go fa ster than the speed of the object
ahead of you, the
driver intervention prompt will not be accompa
nied by a war ning signal.
• If the speed you p reviously set is exceeded, the ind icator light in
t he s peedometer w ill swit ch off .•
Vehicle care Technical data
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ffl..__A_ d_a_ p,__ t_iv _ e_ c_r _ u _i _ s _e _ c_o _n _ t_ r_ o_ l ___________________________________________ _
Applie s to vehicles : w ith a daptiv e cr uise co ntrol
Display in the instrument cluster
Fig. 123 Disp la y in
the instrum ent clu ster
Scroll throug h the available information 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 computer, navigation sys tem * or
adaptive cruise contro l.
@ Vehicle symbol
@ Distance
© Status
© Vehicle symbol
Th e veh icle symbol i ndicates w hether the sys tem has de te ct ed an
object traveling in front .
• Vehicle outline : Open road, no vehicle ahead .
• White v ehicl e: A vehicle is detected ahead.
• Red vehicle : Request for driver to ass ume control.
® Distance
Us ing the a rrows and scale, you can detect how far it is to the vehi cle
in front of you.
• Open road : No arrow appears 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 .
• Request for driver to as sume control: When approach ing rapidly,
the arrow serves as an early warning signal. If the distance selected is
exceeded or poss ibly no t reached, t he arrow moves in to the
red z o ne
on the scale. In certain driving s ituations , you as the driver wi ll have
t o take action =>
page 126, "Driver in tervent io n prompt".
@ Status
• T he text ACC OFF appea rs in w hite le tters whe n ad apt ive cr uise
control is turned off.
• T he text
ACC AVAILABLE appears in wh ite lette rs when the
system is turned on but no desired speed has been set .
• T he text
OVERRIDE appears in white letters when you exceed the
desired speed by accelerating .
• T he text
DISTANCE! appears in red letters when the interval 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 green
letters to indicate the time i nterval you have set and adaptive cruise
control is in manageme nt mode .
• If the driving program "standard" is replaced by "comfort" or
"dynam ic" usin g the MM I, the above text message is supp lemen ted
by an appropriate prompt, e .g .
DISTANCE 1 DYN . •
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Appli es to ve hicl es: wi th a daptive cruise cont rol
System status indicator
The text messages and symbols shown in this area of the
display are not displayed permanently .
Time intervals (such as e::::, ____ e::::,)
Fig. 124 System
status indicator
The different symbols for the time intervals appear if you change the
sett ings => fig. 124 .
Th e text message ... (three white dots) appears if a setting cannot be
implemented with the operating 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 reduce) speed
when no speed has been set previously.
• If you push the lever up to increase (or down to reduce) speed and
this speed is outside the range from 20 to 95 mph (Canada mode ls:
30 to 150 km/h) .
ACC functionality Limited
The text message ACC functionality limited appears when the ACC
system does not detect any objects over an extended time period. For
the time being, the d istance to veh icles up ahead is not being
Controls and equip
ment Safety first
controlled
. The ACC system is not switched off, so increased alertness
is required. The following may be reasons for the text message ACC
Functionally limited:
• The ACC sensor is dirty. The ACC system is not reacting, or is not
reacting correctly, to vehicles traveling ahead.
• It is possible that you are driving on a road with very light traffic
without anything at the s ide of the road (e .g . guard rails, traff ic s igns,
trees). As soon as a vehicle is detected by the system again, it returns
t o its contro l range and the text message disappears.
The ACC sensor is located in the r ig ht front trim grille
=> page 116,
fig. 114 . If there is a loss of operation due to heavy contamination,
this area should cleaned to restore proper operat ion .
ACC not available
The text message ACC not available appears, for examp le, if the
t empe rature of the brakes is excessive. Adaptive cruise control is
temporarily not available. A warning tone sounds as a rem inder .
ACC not available!
The text message ACC not available! appears in the event of a
ma lf unct ion. Adaptive cruise control is turned off. A warn ing tone
sounds as a reminder . Have the system inspected by a qualified deal
ersh ip.
ACC sensor blocked !
The text message ACC sensor blocked ! appears when the ACC System
can no longer guarantee safe detection of objects. Adaptive cruise
control is turned off. A warning tone sounds as a reminder.
To decide whether it is necessary to switch off the ACC (ACC sensor
blocked
!) or if it is only a temporary condition (ACC Functionally
limited), the system w ill also takes into consideration the outside
temperature and/or the windshield wiper operation .
Th e ACC sensor is d irty or blocked (e.g. leaves, snow).
Th e sensor should be cleaned to restore prope r sensor funct ion
=> pagell6,fig.114.
Vehicle care Technical data
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BI..__A_ d_a_ p,__ t_iv _ e_ c_r _ u _i _ s _e _ c_o _n _ t_ r_ o_ l ___________________________________________ _
Parking brake!
The text message Parking brake! appears if emergency braking was
manually initiated with the Electromechanical Parking Brake (EPB).
The adapt ive cruise control is turned off. This is accompanied by a
warning tone.
Stabilisation program
The text message Stabilisation program appears if the Elect ronic
Stabilization Program (ESP) has intervened. In this case the adaptive
cruise control is automat ica lly turned off. This is accompanied by a
warning tone.
Speed
The set speed in mph (Canada km/h) always appears when saving or
changing the speed in adaptive cruise control~
page 119, "How is
the speed stored?" and~
page 119, "Changing stored speed".
Speed too low
The text message Speed too low appears if the current speed is too
low
to set or to hold the requested speed.
When setting a desired speed, it must be at least 20 mph (30 km/h).
At speeds below 12 mph (20 km/h), the cruise control is turned off .
In speeds over 95 mph (150 km/h), the system remains active and
resumes the speed of 95 mph (150 km/h) if the driver removes the
foot from the accelerator .
Selector lever position!
The text message Selector lever position! appears when the selector
lever is moved to position
N. In this position , adaptive cruise control
is not available .•
A pplie s to veh icles : wit h adap tive cru ise contro l
Driver intervent ion prompt
The driver intervention prompt calls on the driver to take
over the situation .
Fig. 125 Instrument cluster: Driver intervention prompt
In certain situations, the braking power of the adaptive cruise control
is not sufficient to maintain an adequate distance from the object
ahead . In th is s ituation, the adaptive cruise control calls on you as the
driver to take action.
The
driver intervention prompt alerts you visua lly and audibly.
• A red vehicle is show n in the instrument cluster display
=> fig . 125.
• The text
DISTANCE! appears in the status line .
• T he indicator light in the Instrument cluste r blinks red.
• A warning tone sounds.