On the road Ill
----------------
• Please also exercise exceptional care when you drive up or down
steep ramps or drive over cu rbs or other obstacles, for which the
vehicle is not designed, because components of the vehicle close to
the ground, such as bumper covers, spoilers and suspension and
exhaust system components , may become damaged. •
Starting off with a trailer
To prevent rolling back unintentionally on an incline, do
the following:
- Keep the switch pulled and depress the accelerator . The
parking brake stays applied and prevents the vehicle from
rolling bac kward .
- You can re lease the switch once you are sure tha t you are
deve loping enoug h forward momentum at the wheels as
you depress the accelerator.
Depend ing on the we ight of the rig (vehicle and trailer) and the
sever ity of the incline, you may roll backwards as you start. You can
prevent ro llin g backwards by holding the park ing bra ke sw itch pulled
out and accelera ting - just as you would when starting on a hill with a
conventional hand brake. •
Emergency braking
In the event that the conventional brake system fails or
locks.
- Pull the switch and cont inue to pull it to slow your ve hicle
w ith the parking brake in an emerge ncy.
- As soon as you re lease the sw itch or acce lerate, the
braking process stops .
Controls and equip
ment Safety first
If you pull the switch and hold it above a speed of about 5 mph (8
km/h),
the eme rgency brak ing f unct io n is ini tia ted. The vehicle is
braked at all four wheels by activat ing the hydraulic brake system .
Brake performance is similar to making an emergency stop=>& .
So that emergency b raking is not act ivated by mistake, an aud ible
warning tone (buzzer) sounds when the switch is pulled. As soon as
the swi tch is released, or the accelerator pedal is depressed, eme r
gency braking stops.
& WARNING
Emergency braking should only be u sed in an emergen cy, when
the normal foot brake ha s failed or th e brake pedal i s ob structed.
Us ing the park ing b rake to perf orm emergency braking will slow
your v ehicl e as if you had made a full brak e app lic ation . Th e law s
of physics cannot be suspen ded even w ith ESP and it s associated
c omponent s (AB S, ASR , EDS ). In corn ers and when road or
weather condit ion s are bad , a full brake application can cause the
v eh icle t o skid or the rear end to bre ak awa y- r isking an a ccident. •
Driver messages in the instrument cluster
Caution : V ehi cle park ed too steep
Th is message appears whe n the parking brake is applied on an incline
that exceeds abo ut 30%.
I n this case the b raking power of the parking brake may
not be
adequate
to prevent the vehicle from rolling unintentionally.
Plea se re leas e park ing brak e
This message appears , when a gear is se lected and the accelerator
peda l is dep ressed - release the parking brake . .,
Vehicle care Technical data
_________________________________________________ O_ n_t_ h _ e_ ro_ a_d __ ffl'II
The display=> page 116, fig. 106 will show the set speed. The display
may vary depending on the type of display in your vehicle. T he indi
cator light
CRUISE (US model) I c-f (Canadian model) w ill also light up
in the instrument cluster.
The speed is kept constant via an engine output adjustment or active
brake intervention.
_& WARNING
• Always pay attention to traffic even when the cruise control is
switched on. You are always responsible for your speed and the
distance between your vehicle and other vehicles.
• For safety reasons, the cruise control should not be used in the
city, in stop-and-go traffic, on twisting roads and when road
conditions are poor (such as ice, fog, gravel, heavy rain and hydro
planing ) - risk of accident.
• Turn off the cruise control temporarily when entering turn
lanes, highway exit lanes or in construction zones.
• Please note that inadvertently "resting" your foot on the accel
erator pedal causes the cruise control not to brake . This is because
the cruise control is overridden by the driver's acceleration .
(I] Tips
The brake lights illuminate as soon as the brakes decelerate
automatically . •
A ppli es to ve hicles : w it h cr uise contro l
Changing speed
- Press lever in the G)orQ direction ==> page 116, fig. 105
to increase or decrease your speed.
- Release the lever to save that speed.
Controls and equip
ment Safety first
Change speed
in increments of 1 mph (1 km/h) by lightly pressing the
lever. If you keep the lever pressed down, yo u will alter your speed in
5 mph (10 km/h) increments.
You can also press the accelerator pedal down to increase your speed, e .g . if you want to pass someone. The speed you saved earlier wi ll
resume as soon as you release the accelerator pedal.
If, however, you exceed yo ur saved speed by 5 mph (10 km/h) for
longer than S m inutes, the cruise control will turn off temporarily.
The symbol will go out but the saved speed will be retained .•
App lies to ve hicle s: w it h cr uise c ontro l
Presetting your speed
You can preset your desired speed while the vehicle is not
moving.
- Turn on the ignition.
- Pull lever into position
(i) ==> page 116, fig. 105 .
- Press the lever in the
0 or 0 direction to increase or
decrease your speed.
- Release the lever to save that speed.
This function makes it possible, for example, to save the speed yo u
want before driving on the highway. Once on the highway, act ivate
the cruise contro l by pulling the lever toward
(D. •
A pp lies to ve hicles : wit h cr uise c ontro l
Switching the system off
Temporary deactivation
- Press the brake pedal, or
Vehicle care Technical data
__________________________________________ A_ d_a""" p:....- t_iv _ e_ C_ r_ u _is _ e_C_ o_n_ t_ r_ o_ L_....J_
Adaptive Cruise Control
Speed and distance control system
App lies to veh icles: wi th Ad aptive Cruise Cont ro l
Descr iption
Th e Adaptive Cruis e Control driv er assistance pro gram is
a c omb in ed spe ed an d dista nce contr ol syst em .
Fig . 107 Front
bumper: Po sition of
radar sensor
Adaptive Cruise Control can help make driving more relaxed and less
t irin g, particular ly d uring long trips on inters tates or o ther highways
that are genera lly straight.
S et ACC to maintain a constant, legal travel speed between 20 and 95
mp h (3 0 -150 km/h) t hat is a pprop riate for prev ailing traffic co ndi
tions. Select a following distance to the vehicle ahead and ACC w ill
adjus t you r speed t o mai ntain that dist an ce.
Adaptive Cruise Control has technical limitations that you must k now,
so p lease read this sectio n carefully, un de rstand how t he sys tem
wor ks and use it pro perly at all times.
How does it work?
You ca n operate the Adaptive Cruise Control using the lever on the
st eerin g wheel column=>
page 122, "H ow is the s peed stored ?" and
=>
page 125, " H ow is the distance (time inte rval) set?" .
Contro ls a nd e quip
m en t Vehicle
OP-eration
Driver information
Important information is bro ught up in the speedometer and in the
ins trumen t clus ter d is pla y as the ve hicle is be ing dr ive n=>
page 127,
"D river information" .
What is important for you to know
The Adaptive Cru ise Contro l is set with system-spec ified limits; that
is, as a driver, you will have to a djus t the s pee d and dis tan ce to t he
vehicle ahead in some in stances =>
page 130, "Driver intervention
promp t" and =>
page 131, "System lim itat ions".
ln. WARNING
Improper use of the Adaptive Cruise Control can cau se collisions,
other accidents and serious personal injury .
• Always remember that the Adaptive Cruise Contro l has limits -
it will not slow the vehicle down or maintain the set distance when
you drive towards an obstacle or something on or near the road
that is not mo ving, such as vehicles stopped in a traffic jam, a
stalled or disabled vehicle .
• Always remember that the Adaptive C rui se Control cannot
detect a vehicle that is driving towards you in your traffic lane and
that it cannot detect narrow vehicles such as motorcycles and bicy
cles .
• Never drive at speeds that are too fast for traffic , road and
weather conditions .
• The Adaptive Cruise Control cannot slow or brake the vehicle
safely when you follow another vehicle too closely . Always
remember that the Adaptive Cruise Control has a braking powe r
that is only about 30% of the vehicle 's maximum braking ability .
Always be prepared to b rake and ta ke e vasive action to a void colli-
sions and other accident situations . .,
Vehicle care Do-it-yourselt service iTechnical data
_________________________________________ __;A~ d:.; a::..i.:: p..:t ..:..iv ..:....:: e_C.::..;.. r_u _i _ s _e _C_;__ o_n_ t_ r_ o_ l __ _
detected. The senso r measures the distance to reflective s urfaces
t h at m ust have a cert ain s ize. T he sys tem res ponds only aft er t he
dis tance measurement has been made.
If a measureme nt is not
poss ible, t he system cannot res pond and w ill not react to a vehicle o r
something else u p ahead.
Open road
When th e road is clear, t he Adaptive Cruise Con trol works like cru is e
co ntrol.
It m ainta in s a c onst ant ta rg et spee d sp ecif ie d by the dr ive r.
Driving in traffic
If a sl ower ve hicle dr iv ing ahead is detec ted, the A dap tive Cr uise
Control decele rates (within t he lim its of the system)=>
page 130,
"Driver interven tion promp t" and => page 131, "System lim itatio ns"
t o its speed and af ter adjus ting, tries to maintain the set d istance
from t he ve hicle ahe ad. Th e vehicle m ay temporari ly dr ive slower
t han the set s peed wh ile adjus ting=>
& in " Descr ipt io n" on
page 119 .
If th e vehicle in front acc ele ra tes, Ad aptive Cru ise Contr ol also a ccel
erates up to the speed t hat you have set.
Situations requiring driver intervention
In some situat ions you will have to use the footbra ke to slow the
vehicle down in order to keep a sa fe distance from vehi cle in fro nt of
you or to avo id a rear -end co llision. I n this s ituation, a symbo l
a ppe ars and a war ning t one soun ds =>
page 13 0.
Passing another vehicle
If you move in to the passing lane and no ve hicle is detected ahea d,
the Adaptive Cruise Control accelerates to the speed you have set and
mai ntains it.
Overriding ACC
You ca n increase your spee d at a ny ti me by steppi ng on t he acceler
ato r pedal. After you release the accelerator peda l, t he system
adju sts bac k dow n to the s peed yo u previously se t.
Controls and equip
ment Safety first
Reducing stopping distance
If the radar sensor de
tects tha t the dis tance to the vehi cle ahea d is
less than defined minim um distance, the brakes a re au toma tically
pre pare d fo r emer gency b rak ing by the driver . The brake pads are
moved very close to t he b rake discs wi thou t ac tually b rak ing t he
vehicle . This bra ke ass istant feature reacts more quickly to t he
dr iv er 's brak ing, and a lso wo rks wh en Ada ptiv e Cr uise Contro l is off .
T he stopping distance is reduced as a result of this advance b rak e
pre par at ion. Th is fu n ction does n ot p erform a ny eme rgency brak ing
maneuve rs by itself; t he d river must always app ly the brakes.
& WARNING
• Never rely on the distance control feature of ACC alone to
prevent rear-end collisions. Always be prepared to brake and take
evasive action to avoid collisions and other accident situations.
• Never allow the closing speed between you and other vehicles
to be so high that the Adaptive C ru ise Control m ay 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.
[I) Tips
Please note that the amo unt o f acce leration the Ada ptive Cr uise
C on trol uses depe nds on t he Dist ance se tt ing se lec ted . DIS TA NCE 1
gives you accelerat io n that is dynamic and spo rty . DISTANCE 4, on the
o th er h an d , gives more mo derat e accelera tion. Fo r mo re info rm at ion
about the time intervals=>
page 125, "H ow is the distance (time
interva l) set ?".
• Please note that if the Adapt ive Cru ise Control has begun b raking
t he vehi cle and t he dr ive r ch oose s to brake the vehicle additi onally,
t he brakes may fe el "hard". Thi s is s imply due to the press ure build
up of the initia l bra king .
• Adaptive Cr uise Contro l is sw itched off afte r pressing the foot
br ak e. Th e speed saved up this poin t ca n be resu med. T o resume the
saved speed, release t he brake pedal and p ull the control lever _.,
Vehicle care Technical data
Adaptive Cruise Control IJI ____________ ___,__ __ ____.
App lies to vehicles : with Adaptive Cruise C ont rol
Changing stored speed
The speed can b e chang ed without touc hing th e acc eler
ator or brake p edal.
Increasing speed
Fig . 111 C ontrol
le ver: Cha ng in g speed
- Press the lever briefly upwards 0 => fig . 111. US A
models: the speed increases by abo ut 2 .5 mph . Canada
mode ls: spee d wi ll increase by one mar k on the speedom
eter sca le.
- Press the lever u pwards
0 and hold it . As long as you ho ld
t h e lever dow n, the light diode disp lay in the speedo meter
L E D d isp lay in the speedometer moves fo rward and t he
speed is increased.
Reducing speed
- Pres s the lev er briefly d ownwards Q . USA mod els : the
speed decreases by 2 .5 mp h. Ca nad a mo dels: sp eed will
decrease by one mark on t he speedo meter sca le .
Con trol s and equ ip
m ent Vehicle
OP-eration
-Press the lever downwards Q and hold it. As long as you
ho ld the lever down , the ligh t dio d e d isp lay in t he speed
ometer LE D display moves backward a nd the speed is
reduced .
After releasing the lever, the system regu la tes t he speed to the value
just set .
After each adjustment , th e newly-set sp eed is s hown fo r a sho rt tim e
in t he Informa tion line ~
page 129.
& WARNING
Improper use of the Adaptive Cruise Control features and inatten
tion can lead to an accident causing serious personal injury.
• It is dangerous to use the "RESUME" feature when the previ
ously set speed is too high f or existing road, traffic or weather
condition s.
• Alway s read and hee d the information and WARNINGS~
& in
" Des cription " on
page 119 .
W Tips
You ca n increase your speed at any time by stepping on the acceler
ator pedal. After yo u re lease the acce le rator peda l, t he system
adjusts back down to the speed yo u previously set . A new desired
speed can be stored at any tim e by p ressing the [SET ) button
~ page 122, fig . 110 . •
Vehicle care Do-it-yourselt service iTechnical data
Adaptive Cruise Control -
----------------
App lies to vehicl es: wi th Adaptive Cru ise Con trol
How is the distance (time interval) set?
Distance con be set in four stages.
Incre as ing dist anc e
Fig . 113 Contro l
l ever : Sett ing distance
- Push the slider switch on ce to the r ight 0 ==> fig . 113 . The
distance currently set is shown for 3 seconds in the instru
ment cluster display.
- Push the slider switch
again to the rightG)to increase the
distance by one step.
Symbol
Dynam ics
Distance at 25 mph (40 km /h )
Di sta n ce at 50
mph (80 km /h )
Distance at 75 mph (120 km /h)
Controls and equip
ment Safety first
DISTANCE 1
c::::,
_ c::::, _ - -
1 second
Sporting
36 Feet ( 11 Meters)
_ ...
72 Feet (22 Meters)
108 Feet (33 Meters)
R educing di stance
Push the slider switch onc e to the left Q. The d istance
currently set is shown for 3 seconds in the instrument
cluster display.
Push the slider switch
again to the left Oto decrease the
distance by one step.
Th e d istance at wh ic h the Adaptive Cruise Control fo llows a vehicle in
front is determined by
time intervals. A time interval to a vehicle in
front is established and maintained. This produces a speed-depen
dent interval. The higher the speed, the greater the safety interval in
feet (meters)
=> & .
For example, if the interval DI STA NCE 3 is set, a vehicle in front is
followed at a time interval of 1.8 seconds.
For a speed of 50 mph (80 km /h ) this would be equ ivalent to a
distance of 131 feet (40 m ete rs) to the veh icle in front .
T he distances giv en here are nominal va lues. The vehicle speed may
exceed o r fall short of these target speeds , depending on the driving
situation and the d riving style of the vehicle ahead .
DISTANCE 2
~-- c::::, _ -
1.3 seconds
Standard
95 Feet (29 Meters)
144 Feet (44 Meters)
DISTANCE 3
~ ___ c::::,_
1.8 seconds
Standard
66 Feet (20 Meters)
131 Feet (40 Meters)
197 Feet (60 Meters)
DISTANCE 4
c::::,_ -- _c::::,
2.3 seconds
Comfortable
82 Feet (25 Meters)
16 7 F eet (51 Me ters)
249 Feet (76 Meters)
~
Vehicle care Technical data
__________________________________________ A_ d_a""" p:....- t_iv _ e_ C_ r_ u _is _ e_C_ o_n_ t_ r_ o_ L_....Jfflll
Driver information
Applies to veh icles: with Adaptive C ruise Cont ro l
Displays in the instrument cluster
Depending on the driving situation, driver information is
displayed in the instrument cluster .
@ Speedometer and indicator light display
@ Display in the instrument cluster
Fig. 114 O vervi ew
in strume nt clu ster
@ Speedomet er and indicator light display
Important information concerning vehicle operation with Adaptive
Cru ise Control is shown in display area @. T he desired speed you set
is indicated in the speedometer (L ED lights around the edge).
Th e ind ic ator lig hts show whether the sys tem has detec ted a ve hicle
traveling ahead.
@ Display in the instrument cluster
In d isp lay area @ information from the navigation system * and the
t rip compu ter is displayed in a ddition to info rmation abou t Ad apt ive
Cru ise Control.
You can select among the different information by repeated b rief
taps on the
I RESE T! but ton on the windshield w iper lever~ page 35,
"Operation" .
Contro ls a nd e quip
m en t Vehicle
OP-eration
Certain pieces of in format ion in the bottom part of the display are not
show n perm anent ly . In fo rmat ion is dis played on ly if you set or
change the speed setting, change the t ime interval, when messages
are displayed or if the Adaptive Cr uise Control is tu rned off for safety
reasons .•
App lies to v ehicle s: with Adaptive C ru ise Cont rol
Display in the speedometer
Desired speed
Fig. 1 15 Di spl ay in
th e sp eedometer
The des ired speed set by the driver is displayed by a red LED.
If the desired speed was set between two lines o n the speedometer
using the
[ SET ! button, the two closes t light em itting diodes will
come on~ fig. 115 .
The system allows on ly speeds to be set between 20 to 95 mph (30
to 150 km/h) to be set. This speed range is fa int ly ill umina ted in the
speedometer (L ED lights) .
Indicator lights (symbols)
• ""~ Open ro ad: The indicator light 11 "~ shows that ACC is active
and that no moving veh icle has been detected with in range of the
radar sensor up ahead in your lane of travel. The set speed is main-
tained. .,,_
Vehicle care Do-it-yourselt service iTechnical data
__________________________________________ A_ d_ a_,_ p_t _iv _ e_C_ r_u _i _ s _e _C_ o_n_ t_ r_ o_ l __ _
• Driving in traffic: If a vehicle is detected ahead, the arrow moves
on the scale. The green area represents the distance set. When
approaching slowly, the arrow moves from the
gray zone to the green
zone on the scale.
• Driver intervention prompt: When approach ing rapidly, the
arrow serves as an early warning signal. If the distance se lected is
exceeded or possibly not reached, the arrow moves into the
red zone
on the scale. In certain driving situations, you as the driver will have
to take action=>
page 130, "Driver intervent ion prompt".
© Status
• Th e text ACC OFF appears in white letters when Adaptive Cruise
Control is turned off.
• The text
ACC AVAILABLE appears in wh ite letters when the
system is turned on but no desired speed has been set.
• The text
OVERRIDE appears in white letters when you exceed the
desired speed by accelerating .
• The 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.
• Th e text messages
DISTANCE 1 to DISTANCE 4 appea r in green
letters to indicate the time interval you have set and Adaptive Cruise
Control is in management mode .
• If the driving program "standard" is replaced by "comfort" or
" dynamic" using the MMI, the above text message is supplemented
by an appropriate prompt, e.g.
DISTANCE 1 -dyn . . •
Controls and equip
ment Safety first
App
lies to vehicles : with Adaptive Cr uise Control
System status indicator
The text messages and symbols shown in this area of the
display are not displayed permanently.
Time intervals (such as c::::, ____ c::::,)
Fig. 117 System
status indicato r
The different symbols for the time intervals (distance) appear if you
change the settings=> fig . 117.
Thr ee wh ite dots ... appear if a setting cannot be made with the oper
ating lever . The following are possible reasons
• If you pull the control 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 yo u push the lever up to increase (or down to reduce) speed and
this speed is outside the 20 to 95 mph (30 to 150 km/h) speed range.
ACC functionality Limited
The message ACC functional ity limited appears when the ACC
System does not detect any moving vehicles up ahead in your lane of
travel for a longer period of time. During this time, the distance to
moving veh icles in your lane of travel up ahead is not being main
tained . The ACC system is not sw itched off, and increased attent ion .,,
Vehicle care Technical data