-
asyour attention wanes, the circle in the
cent reofthe display becomes smaller
If AT TENTION ASSIST is unable tocalculate the
attention le vel and cannot issue a warning, the
System suspended message appears.
If a warning is given in the Instrument Displa y,the
multimedia system o.ers tosear chfor a rest
area. You can select a rest area and start naviga-
tion tothis rest area. This function can be acti va-
te d and deactivated in the multimedia system.
If AT TENTION ASSIST is deactivated, theÛ
symbol appears in the assistance graphic in the
Instrument Displ ay. ATer theve hicle is star ted,
AT TENTION ASSIST is automatically activated. The
last selected sensitivity le velre mains stored.
Syst
Syst em limits
em limits
AT TENTION ASSIST is active in the 60 km/h to
200 km/h speed range.
Pa rticular lyin thefo llowing situations, ATTENTION
ASSIST only functions in a restric ted manner and
wa rnings may be dela yed or not occur:
R Ifyo u ha vebeen driving for less than appr ox-
imately 30 minutes. R
Ifth ero ad condition is poor (une venro ad sur-
fa ce or po tholes).
R Ifth ere is a strong side wind.
R Ifyo u adopt a sporty driving style (high corner-
ing speeds or high rates of acceleration).
R IfAc tive Steering Assist is activated and active
(/ page 229).
R Ifth e time has been set incor rectl y.
R Ifyo uch ange lanes and vary your speed fre-
qu ently in active driving situations.
The ATTENTION ASSIST dr owsiness or alertness
assessment is reset and restar ted when continu-
ing the journey in thefo llowing situations:
R You switch o. theve hicle.
R Ifyo u unfasten your seat belt and open the
driver's door (e.g. tochange drivers or take a
break). Se
Se tting A
tting A TTENTION ASSIST
TTENTION ASSIST
Multimedia system:
4 © 5
Settings 5
Assistance
5 Attention Assist
Se
Se tting op
tting op tions
tions #
Select Standard, SensitiveorOff.
Sugg
Sugg es
esting a rting a r es
est art ar ea
ea #
Select Suggest rest area. #
Activate or deactivate the function.
If AT TENTION ASSIST de tects fatigue or
increasing lack of attention, it suggests a rest
area in the vicinity. #
Select the suggested rest area.
Yo u are guided tothe selected rest area. Cr
Cr
uise contr
uise control and limit ol and limit er
er F
F
unction of cr
unction of cr uise contr
uise control ol
Cruise control regula testh e speed totheva lue
selected bythe driver.
If yo u accelerate toove rtake, forex ample, the
stored speed is not dele ted. If youre mo veyour 218
218
Driving and parking
fo
ot from the accelerator pedal aTer overtaking,
cruise cont rol will resume speed regulation back
to the stored speed.
Yo u can store any speed abo ve20 km/h up tothe
maximum design speed or up tothe set winter
tyre limit.
Obser vethe no tes on driving systems and your
re sponsibility; you may otherwise failto recognise
dangers (/ page 209).
Display
Display s in t
s in the Ins
he Ins tr
trument Display
ument Display
R h (gre y): cruise control is selected but not
yet activated.
R h (gre en): cruise control is active.
A stored speed appears along with theh dis-
pla y.
% The segments extending from the cur rent
stored speed tothe end of the scale, or tothe
set winter tyre limit, light up in the speedome-
te r. Syst
Syst
em limits
em limits
Cruise control may be unable tomaintain the
stored speed on uphill gradients. The stored
speed is resumed when thegr adient evens out.
Change into a lo werge ar in good time on long and
steep downhill gradients. Take particular no teof
th is when driving a laden vehicle. By doing so, you
will make use of the engine's braking e.ect. This
re lie vesth e load on the brake system and pre-
ve nts the brakes from overheating and wearing
to oqu ickl y.
Do not use cruise control in thefo llowing situa-
tions:
R in tra1c situations which requ ire frequent
ch anges of speed, e.g. in heavy tra1c, on
winding roads
R on slippery roads. Accelerating can cause the
drive wheels tolose traction and theve hicle
could then skid.
R when visibility is poor
F
F unction of t
unction of t he limit
he limit er
er
The limiter restricts the speed of theve hicle. To
re duce the speed tothe set speed, the limiter
applies the brakes automaticall y. Yo
u can limit the speed as follo ws:
R Variable: for speed restrictions, e.g. in built-up
areas.
R Perm anent: for long-term speed restrictions,
e.g. when driving in winter ty remode.
The variable limi ter is operated using the cor re-
sponding steering wheel buttons. You can store
any road speed from 20 km/h to250 km/h or up
to the set winter tyre limit. You can also per form
settings while theve hicle is stationary if theve hi-
cle has been star ted.
Obser vethe no tes on driving systems and your
re sponsibility; you may otherwise failto recognise
dangers (/ page 209).
Display
Display s in t
s in the Ins
he Ins tr
trument Display
ument Display
R È (gre y): variable limi ter is selected but not
yet activated.
R È (0ashes grey):variable limi ter is temp o-
rari lypassive.
R È (gre en): variable limi ter is activated. Driving and parking
219
219
%
Ifyo u brake, deactivate ESP ®
or if ESP ®
inter-
ve nes, cruise cont rol is deactivated. The varia-
ble limi ter is not deactivated.
Inf
Inf or
ormation on t
mation on t he per
he permanent limit
manent limit er
er
If th eve hicle should ne verex ceed a speci/c
speed (e.g. for driving in winter tyre mode), you
can set this speed with the permanent limiter.
Yo u do this by limiting the speed between
160 km/h and 240 km/h in the multimedia sys-
te m (/ page 222).
Shortly before the set speed is reached, it
appears in the Instrument Displa y.When you con-
/rm the message, display messages no longer
appear until you switch o. theve hicle. The speed
will only be displ ayed again once theve hicle has
been restar ted or if the set speed is changed.
The permanent limi ter does not switch topassive
mode even during kickdown and the driven speed
re mains below the set speed. Se
Se tting t
tting t he limit speed f
he limit speed f or wint
or winter tyr
er tyres
es
Multimedia system:
4 © 5
Settings 5
Vehicle
5 Winter tyres limit #
Select a speed or deactivate the function. A
A
ctiv
ctiv e Dist
e Dist ance Assis
ance Assist DIS t DISTR
TRONIC
ONIC F F
unction of A unction of A ctiv
ctive Dist
e Dist ance Assis
ance Assist DIS t DISTR
TR ONIC
ONIC
Ac tive Distance Assist DISTRONIC maintains the
set speed on free-0owing roads. If vehicles in
front are de tected, the set distance is maintained,
if necessar y,until theve hicle comes toa halt. The
ve hicle accelerates or brakes depending on the
distance totheve hicle in front and the set speed.
The speed (in thera nge between 20 km/h and
210 km/h) and the distance totheve hicle in front
are set and sa ved on the steering wheel.
Other features of Active Distance Assist
DISTRONIC:
R Adjusts the driving style depending on the
selected drive prog ram (fuel-saving, comfor ta-
ble or dynamic) (/ page 181) R
Reacts tostationa ryvehicles de tected in
urban speed ranges (e xcept bicycles and
mo torc yc les)
R Initiates acceleration tothe stored speed if the
turn signal indica tor is switched on tochange
to theove rtaking lane
R Take s one-sided overtaking restrictions into
account on mo torw ays or on multi-lane roads
with separate car riag ewa ys(countr y-depend-
ent)
If th eve hicle has been braked toa standstill on
multi-lane, separate car riag ewa ysby Active Dis-
ta nce Assist DISTRONIC, it can automatically fol-
low theve hicle in front when driving o. again
within 30 seconds. If a critical situation is de tec-
te d when driving o., a visual and acoustic warning
is given indicating that the driver must now take
cont rol of theve hicle. The vehicle is not acceler-
ated any fu rther.
Obser vethe no tes on driving systems and your
re sponsibility; you may otherwise failto recognise
dangers (/ page 209). 222
222
Driving and parking
A
A
ctiv
ctiv e Dist
e Dist ance Assis
ance Assis t DIS
t DISTR
TRONIC display
ONIC display s in t
s in the
he
Ins
Ins tr
trument Display
ument Display Assis
tance graphic
1 Route-based speed adap tation: type of route
ev ent (/ page 227)
2 Vehicle in front
3 Distance indicator
4 Set speci/ed distance
P
P er
er manent st
manent st atus displa
atus displa y of A
y of Activ
ctive Dist
e Dist ance
ance
Assis
Assist DIS t DISTR
TRONIC
ONIC
R k (white): Active Distance Assist
DISTRONIC selected, speci/ed distance set R
k (white vehicle, green speedome ter):
Ac tive Distance Assist DISTRONIC acti ve,
speci/ed dis tance set and vehicle de tected
R k (gre en): Active Distance Assist
DISTRONIC acti ve, speci/ed dis tance set and
ve hicle de tected
R r: Route-based speed adap tation acti ve
( / page 227).
The stored speed is shown along with the perma-
nent status display and highlighted on the speed-
ome ter. When Active Distance Assist DISTRONIC
is passive, the speed is grey ed out.
% On mo torw ays or high-speed major roads, the
gr een ç vehicle symbol is displ ayed cycli-
cally when theve hicle is ready topull away.
% Ifyo u depress the accelerator pedal be yond
th e setting of theAc tive Distance Assist
DISTRONIC, the system is switched topassive
mode. The çsuspended message
appears in the Instrument Displa y.
Displa
Displa y on t
y on the speedomet
he speedomet er
er
The stored speed is highlighted on the speedome-
te r. Ifth e speed of theve hicle in front or thespeed adjustment
forth ero ute event ahead is
less than the stored speed, the segments in the
speedome ter light up. The Instrument Display
sho ws th e deactivation of Active Distance Assist
DISTRONIC, as well as alterations tothe speed
due tomanual or automatic adoption of the maxi-
mum permissible speed.
Syst
Syst em limits em limits
The system may be impaired or may not function
in thefo llowing situations, forex ample:
R In sno w,rain, fog, heavy spr ay, if there is glare,
in direct sunlight or in greatly varying light
conditions.
R The windscreen in the area of the camera is
dirty, misted up, damaged or co vered.
R Ifth era dar sensors are dirty or co vered.
R In multi-s tore y car par ksor on roads with
steep uphill or downhill gradients.
R Ifth ere are nar row vehicles in front, such as
bicycles or mo torc yc les.
In addition, on slippery roads, braking or acceler-
ating can cause one or se veral wheels tolose
traction and theve hicle could then skid. Driving and parking
223
223
#
Brie0y press Monthe upper section or
N onthe lo wer section of control panel
1.
The stored speed is increased or reduced by
10 km/h.
or #
Press and hold Monthe upper section or
N onthe lo wer section of control panel
1.
The stored speed is increased or reduced in
increments of 10 km/h.
or #
Accelerate theve hicle tothe desired speed. #
Press Monthe upper section of control
panel 1.
A A dop
dop ting t
ting t he limit speed sho
he limit speed sho wn in t
wn in the ins
he instrtrument
ument
clust
clust er
er #
Activate Active Distance Assist DISTRONIC. #
Press J.
The limit speed displa yed in the inst rument
cluster is adop ted as the stored speed. The ve
hicle adapts its speed tothat of theve hicle
in front, but only up tothe stored speed.
Pulling awa
Pulling away wit
y wit h A
h Activ
ctiv e Dist
e Dist ance Assi st
ance Assist
DIS
DIS TR
TRONIC
ONIC #
Activate Active Distance Assist DISTRONIC
and remo ve yo urfoot from the brake pedal. #
Press J.
or #
Depress the accelerator pedal brie0y and
/rml y.
The functions of Active Distance Assist
DISTRONIC continue tobe car ried out.
R
R educing or incr
educing or incr easing t
easing the
hespeci/ed
speci/ed dist
distance
ance
fr
fr om t
om t he v
he vehicle in fr
ehicle in fr ont
ont #
Press K.
The h display appears. The speci/ed dis-
ta nce is reduced byone le vel.
If th e lo west le vel is already selected, the
selection jumps tothe highest le vel. Deactiv
Deactiv ating A
ating Activ
ctive Dist
e Dist ance Assis
ance Assist DIS t DISTR
TRONIC or
ONIC or
t
t he v
he v ar
ariable limit
iable limit er
er &
W
WARNING
ARNING Risk of an accident due to
Ac tive Distance Assist DISTRONIC being
acti vewhen you lea vethe driver's seat
If yo u lea vethe driver's seat while theve hicle
is being braked byActive Distance Assist
DISTRONIC onl y,theve hicle can rollaw ay. #
Always deacti vate Ac tive Distance Assist
DISTRONIC and secure theve hicle to
pr ev ent it from rolling away before you
lea vethe driver's seat. #
Press ±.
% Ifyo u brake, deactivate ESP ®
or if ESP ®
inter-
ve nes, Active Distance Assist DISTRONIC is
deactivated. The variable limi ter is not deacti-
va ted.
F
F unction of A
unction of A ctiv
ctive Speed Limit Assist
e Speed Limit Assist
If a change in the speed limit of 20 km/h or more
is de tected and automatic adoption of speed lim-
its is activated, the new speed limit is automati-
cally adop ted as the stored speed (/ page 240).226
226
Driving and parking
The driven speed is adjusted when
theve hicle is
le ve l with the tra1c sign at the latest. In the case
of signs indicating entry into an urban area, the
speed is adap ted according tothe speed permit-
te d within the urban area. The speed limit display
in the Instrument Display is alw ays updated when
th eve hicle is le vel with the tra1c sign.
If th ere is no speed restriction on an unlimited
str etch ofroad (e.g. on a mo torw ay),th ere com-
mended speed is automatical lyadop ted as the
stored speed. The system uses the speed stored
on an unlimited str etch ofroad as there commen-
ded speed. If you do not alter the stored speed on
an unlimited str etch ofroad, there commended
speed is 130 km/h.
If Ac tive Distance Assist DISTRONIC has been put
into passive mode bypressing the accelerator
pedal, only speed limits which are higher than the
set speed are adop ted.
Obser vethe no tes on driving systems and your
re sponsibility; you may otherwise failto recognise
dangers (/ page 209). Syst
Syst em limits em limits
The system limits of Tra1c Sign Assist apply to
th e de tection of tra1c signs (/ page 238).
Speed limits below 20 km/h are not automatical ly
adop tedby the system as the stored speed. Tem-
porary speed restrictions (e.g. for a cer tain time
or due towe ather conditions) cann otbe proper ly
de tected bythe system. The maximum permissi-
ble speed applying toave hicle with a trailer is not
de tected bythe system.
Ad just the speed in these situations. &
W
WARNING
ARNING Risk of accident due toActive
Speed Limit Assist ada pting theve hicle's
speed
The speed adop tedby Active Speed Limit
Assist may be too high or incor rect in some
individual cases, such as:
R at speed limits below 20 km/h
R inwe t conditions or in fog
R when towing a trailer #
Ensure that the driven speed complies
with tra1c regulations. #
Adjust the driving speed tosuit cur rent
tra1c and weather conditions. F
F
unction of r
unction of r out
oute-based speed adapt
e-based speed adapt ation
ation
When Active Distance Assist DISTRONIC is acti va-
te d, theve hicle speed will be adap ted accordingly
to thero ute events ahead. Depending on the drive
prog ram selected, theve hicle neg otiates a route
ev ent ahead in an economical, comfor table or
dynamic manner. When thero ute event has been
passed, theve hicle accelerates again tothe
stored speed. The set distance totheve hicle in
front, vehicles de tected ahead and speed restric-
tions ahead are take n into account.
Yo u can activate and deactivate route-based
speed adap tation in the multimedia system
(/ page 228).
The following route events are take n into account:
R Bends
R T-junctions, roundabouts and toll stations
R Turns and exits Driving and parking
227
227
Multimedia system:
4 © 5
Settings 5
Assistance
5 Route-based speed adapt. #
Activate or deactivate the function.
When the function is active, theve hicle speed
is adjusted depending on thero ute events
ahead.
% Further information on the route-based speed
adap tation (/ page 227).
F
F unction of A
unction of A ctiv
ctive
eTr
Tra1c
a1c Jam Assist
Jam Assist
Ac tive Tra1c Jam Assist helps you when in tra1c
jams on multi-lane roads with separate car riage-
wa ys by automatically pulling away within 60 sec-
onds and with mode rate stee ring manoeuvres. It
orients itself using theve hicle in front and lane
markings. Active Tra1c Jam Assist automatically
main tains a safe distance from theve hicle in front
and vehicles cutting in.
Ac tive Tra1c Jam Assist requ ires you, as the
driver, tokeep your hands on the steering wheel
at all times so that you are able tointer vene at
any time tocor rect the course of theve hicle and
ke ep it in lane. Obser vethe no tes on driving sys- te
ms and your responsibility; you may otherwise
fa ilto recognise dangers (/ page 209).
Ac tive Tra1c Jam Assist activates automatically as
soon as all of there qu irements are met: The ¬
status display appears in the inst rument clus ter
when the function is active.
Re quirements:
R You are in a tra1c jam on a mo torw ay or high-
speed major road.
R Active Distance Assist DISTRONIC is acti vated
and active (/ page 224).
R Active Brake Assist is available (/ page 232).
R Active Steering Assist is activated and active
(/ page 231).
R Active Tra1c Jam Assist is activated
(/ page 229).
R You are tr avelling no faster than 60 km/h.
Syst
Syst em limits
em limits
The system limi tations of Active Distance Assist
DISTRONIC and Active Steering Assist apply to
Ac tive Tra1c Jam Assist. A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating A
ating Activ
ctive
eTr
Tra1c
a1c Jam Assist
Jam Assist
Multimedia system:
4 © 5
Settings 5
Quick access #
Select ¬. A
A
ctiv
ctiv eSt
e St eer
eer ing Assist
ing Assist F
F
unction of A
unction of A ctiv
ctiveSt
e St eer
eer ing Assist
ing Assist
Ac tive Steering Assist is only available up to a
speed of 210 km/h. The system helps youto stay
in the centre of the lane bymeans of moderate
steering inter ventions. Depending on the speed
driven, Active Steering Assist uses theve hicles
ahead and lane markings as a refere nce.
% Depending on the countr y,in the lo wer speed
ra nge Active Steering Assist can use the sur-
ro unding tra1c as a refere nce. If necessar y,
Ac tive Steering Assist can then also pr ovide
assistance when driving outside the centre of
th e lane, forex ample, toform are scue lane.
If th e de tection of lane markings and vehicles
ahead is impaired, Active Steering Assist switches
to passive mode. The system pr ovides no support
in this case. Driving and parking
229
229
S
S
t
tatus displa
atus displa y of A
y of Activ
ctiveSt
e St eer
eer ing Assis
ing Assist in t t in the
he
Ins
Instr trument Display
ument Display
R Ø (gre y): acti vated and passive
R Ø (gre en): activated and active
R Ø (red): system limits de tected
R Ø (white, red hands): "hands on the steer-
ing wheel" prom pt
% During the transition from active topassive
status, theØ symbol is shown as enlar ged
and 0ashing. Once the system is passive, the
Ø symbol is shown as grey inthe Instru-
ment Displa y.
% Depending on the selected vehicle settings,
Ac tive Steering Assist may be una vailable.
St
St eer
eer ing and t
ing and t ouc
ouch det
h det ection
ection
The driver is requ ired tokeep their hands on the
stee ring wheel at all times and be able tointer-
ve ne at any time tocor rect the course of theve hi-
cle and keep it in lane. The driver must expect a
ch ange from active topassive mode or vice versa
at any time. If
th e system de tects that the driver has not
steered theve hicle for a considerable period of
time or has remo vedth eir hands from the steering
wheel, display 1appears. If the driver still does
not steer theve hicle, a warning tone sounds in
addition tothe visual warning message.
If th e driver does not react tothewa rning for a
considerable period, the system can initiate an
emer gency stop (/ page 231).
If th e driver steers, no warning is issued, or the
wa rning is ended.
If Ac tive Steering Assist de tects that a system
limit has been reached, a visual warning is issued
and a warning tone sounds. Obser
vethe no tes on driving systems and your
re sponsibility; you may otherwise failto recognise
dangers (/ page 209).
Syst
Syst em limits
em limits
Ac tive Steering Assist has a limited steering tor-
qu efo r lateral guidance. In some cases, the steer-
ing inter vention is not su1cient tokeep theve hi-
cle in the lane or todrive thro ugh exits.
The system may be impaired or may not function
in thefo llowing instances:
R There is poor visibility, e.g. due tosno w,rain,
fo g, heavy spr ay,gr eatly varying light condi-
tions or strong shadow s onthe car riag ewa y.
R There is glare, e.g. from oncoming tra1c,
di re ct sunlight or re0ections.
R Insu1cient road illumination.
R The windscreen is dirty, mis ted up, damaged
or co vered in the vicinity of the camera, e.g.
by a stic ker.
R No, or se veral, unclear lane markings are pres-
ent for one lane, or the markings change
qu ickl y,forex ample, in a construction area or
junctions. 230 230
Driving and parking