Page 145 of 416

Fo
rth e automatic functions towo rkcor rectl y,the
driver must be seated in the cor rect seat position
(/ page 64).
The function of the electric parking brake is
dependent on the on-board electrical sy stem volt‐
age. If the on-board electrical sy stem voltage is
low or there is a malfunction in the sy stem, it
may not be possible toapply the electric parking
brake and theye llow 0024 indicator lamp lights
up.
In this case, park theve hicle in thefo llowing way:
R Park theve hicle on le velground and secure it
to prev ent it from rolling away.
R Ve
hicles with automatic transmission:
shift the transmission toposition 005D.
% The electric parking brake is only actually
applied when there d0049 and0024 (USA)
or 0024 (Canada) indicator lamps light up
continuousl y.
It may not be possible torelease a parking brake
if th e on-board electrical sy stem voltage is low or
if th ere is a malfunction in the sy stem. Inform a
qu alified specialist workshop.
When the engine is switched off, the electric
parking brake car ries out a function test at regu‐
lar inter vals. Noises are normal in this process.
Au tomatically applying the electric parking
brake
Ve hicles with automatic transmission:
The electric parking brake is auto matically
applied when the transmission is in position 005D.
In addition, at least one of thefo llowing condi‐
tions must be fulfilled:
R The engine is switched off
R The driver is not sitting in the driver's seat
R The belt buckle is undone To
prev ent the electric parking brake from apply‐
ing automaticall y,pull switch 1.
The electric parking brake is also automatically
applied if Active Dis tance Assi stDISTRONIC has
brought theve hicle toast andstill.
In addition, at least one of thefo llowing condi‐
tions must be fulfilled:
R The engine is switched off
R The driver is not sitting in the driver's seat
R The belt buckle is undone
R There is a sy stem malfunction
R The po wer supp lyis insuf ficient
R The vehicle is stationary for a long time
The red0049 and0024 (USA) or 0024(Canada)
indicator lamp in the instrument display lights up.
The electric parking brake is only actually applied
when there d0049 and0024 (USA) or 0024
(Canada) indicator lamps light up continuousl y.
Re leasing the electric pa rking brake automat‐
ically
Ve hicles with automatic transmission:
The electric parking brake of your vehicle is
re leased when all of thefo llowing conditions are
fulfilled:
R The driver is sitting in the driver's seat.
R The driver is belted.
R The engine is running.
R The transmission is in position 005Bor005E and
yo u depress the accelera tor.
or
Yo u swit chfrom transmission position 005Dto
position 005Bor005E. You must also depress the Driving and pa
rking 14 3
Page 146 of 416

accelerator if tra
veling on steep uphill gradi‐
ents.
R Ifth e transmission is in position 005E,there ar-
end doors must be closed.
App lying/releasing the electric pa rking brake
manually &
WARNING Risk of accident and inju ry
due tochildren and animals left unat ten‐
ded in theve hicle
If yo u lea vechildren and animals unat tended
in theve hicle, they may be able toset the
ve hicle in motion, forex ample by:
R Releasing the parking brake.
R Shifting the automatic transmission out of
park position 005D.
R Starting the engine.
In addition, they may operate vehicle equip‐
ment and become trapped. #
Never lea vechildren and animals unat‐
te nded in theve hicle. #
When leaving theve hicle, alw aysta ke
th e SmartK eywith you and lock the
ve hicle. #
Toappl y:press switch 1.
When the electric parking brake is applied,
th ere d0049 and0024 (USA) or 0024(Can‐
ada) indicator lamps light up in the instru‐
ment displa y.The electric parking brake is
only actually applied when there d0049
and 0024 (USA) or 0024(Canada) indicator
lamps light up continuousl y.
It is also possible toapply the electric parking
brake when the ignition is switched off. #
Torelease: pull switch 1.
The red0049 and0024 (USA) or 0024(Can‐
ada) indicator lamps in the instrument display
go out.
Yo u may on lyrelease the electric parking
brake if the ignition is switched on with the
st art/ stop button.
Emer gency braking In
theeve nt of an emergency, you can brake the
ve hicle while it is in motion with the electric park‐
ing brake. #
While driving, press switch 1ofthe electric
parking brake.
The vehicle is braked as long as youke ep
switch 1ofthe electric parking brake
depressed.
The longer electric parking brake switch 1is
depressed, the greater the braking forc e.
During the braking procedure, you will receive the
fo llowing feedback from theve hicle:
R awa rning tone sounds
R the "Release parking brake" display message
appears
R there d0049 and0024 (USA) or 0024(Can‐
ada) indicator lamps in the instrument display
fl ash
When theve hicle has been braked toast andstill,
th e electric parking brake is applied. Pa
rking theve hicle for an extended period Pa
rking theve hicle for longer than 4 weeks #
Method 1: connect thest ar ter battery to a
trickle charge r via the jump-s tart connection. 14 4
Driving and pa rking
Page 147 of 416

#
Method 2: interrupt the po wer supply byacti‐
va ting standby mode (/ page145). #
Method 3: disconnect all batteries. In this
case, please con tact a qualified specialist
wo rkshop.
% Charge
thest ar ter battery every 6 months,
eve n if it has been disconnected or in
st andby mode.
The charge leve l of thest ar ter battery must be
ch eckedeve ryfour we eks if no measures are
ta ke nto maintain the battery charge. #
Voltage of thest ar ter battery below
12 .2 V: charge thest ar ter battery topreve nt
deep discha rge damage.
% Yo
u can obtain fur ther information at a quali‐
fi ed specialist workshop. St
andby mode Ac
tivating/deactivating standby mode
Re quirements:
R The engine is switched off.
When you activate standby mode, the energy loss
is minimized if theve hicle is par kedfo r an exten‐
ded pe riod.
St andby mode has thefo llowing characteristics:
R The star ter battery is pr otected.
R The maximum non-operational time is shown
inthe media displa y.
R The connection toonline services is inter rup‐
te d.
R The ATA (anti-theft alarm sy stem) is not avail‐
able.
R The interior motion sensor and tow- aw ay
alarm functions are not available.
If th efo llowing conditions are met, standby mode
can be activated or deactivated using the multi‐
media sy stem:
R The engine is switched off.
R The ignition is switched on.
If th e displa yed non-operational time of theve hi‐
cle is exceeded, there could be a loss of comfort
and thest ar ter battery can no longer be guara n‐
te ed toreliably start the engine. The
star ter battery must firs t be charge d in the
fo llowing situations:
R The non-operational time of theve hicle is to
be extended.
R The messa gethat the battery charge is not
suf ficient forst andby mode appears in the
media displa y.
% St
andby mode is automatically deactivated
when the ignition is switched on.
On-board computer: 4 Settings 5
Vehicle
5 Ruhezustand (Stan dby) #
Toactivate/deactivate: selectYesorNo.
% If
th e options are gr ayed out, then the battery
ch arge is not suf ficient forst andby mode. Driving and driving saf
ety sy stems Note
on driving sy stems and your responsibil‐
ity Yo
ur vehicle is equipped with driving sy stems
which assist you in driving, parking and maneu‐
ve ring theve hicle. The driving sy stems are aids
and do not relie ve you of your responsibility.
Alw ays pay attention tothe tra ffic and inter vene
if necessa ry. Be aware of the limitations rega rd‐
ing the safe use of these sy stems. Information about sensors
Cer
tain driving and driving saf ety sy stems use
sensors 1tomonitor the area in front of, behind
or next totheve hicle (depending on theve hicle's
equipment). Driving and parking
14 5
Page 148 of 416

Depending on
theve hicle's equipment, thera dar
sensors are integrated behind the bumpers
and/or behind thera diator grill. Keep these parts
free of dirt, ice and slush (/ page 288). The sen‐
sors must not be co vered, forex ample bybicycle
ra ck s, overhanging loads or sticke rs. Af ter a colli‐
sion, ha vethe function of thera dar sensors
ch ecked at a qualified specialist workshop as
damage (bo thvisible or non-visible) may ha ve
occur redto the bumper or radiator trim. Fu
nction of driving sy stems and driving
saf ety sy stems In
this section, you will find information about the
fo llowing driving sy stems and driving saf ety sys‐
te ms:
R ABS ( Anti-lock braking system)
(/ page 146)
R ASR (acceleration skid control) (/ page 147)
R BAS (Brak eAssist System) (/ page146)
R ESP ®
(Electronic Stability Program)
(/ page 147)
R EBD ( Electronic Brakeforc eDistribution)
(/ page 148)
R Active Brake Assi st (/ page 149)
R Cruise co ntrol (/ page 151)
R Active Dis tance Assi stDISTRONIC
(/ page 152)
R Hill start assist (/ page155)
R HOLD fu nction (/ page 155)
R Parking Assist PARKTRONIC (/ page156)
R Rear view camera (/ page157)
R Surround view camera (/ page159)
R ATTENTION ASSIST (/ page162)
R Traf fic Sign Assi st (/ page 163)
R Blind Sp otAssi st (/ page 164)
R Active Lane Keeping Assist (/ page167) Fu
nctions of ABS (Anti-lock Braking Sy stem) Obser
vethe impor tant sa fety guidelines forthe
driving saf ety sy stem. ABS cont
rols the brake pressure in critical situa‐
tions:
R The wheels are pr evented from lo cking when
braking, e.g. during maximum full-s top brak‐
ing or when there is insuf ficient tire traction
R The steerability of theve hicle in term s of
ph ysical possibilities is ensured when braking
R ABS is active from speeds of appr ox. 3 mph
(5 km/h). On a slippery road sur face, ABS
inter venes even if you on lybrake gently.
Sy stem limits
If th ere is a malfunction and theye llow 0025 ABS
wa rning lamp lights up continuously in the instru‐
ment display af terst arting the engine, ABS may
be impaired or inoperative.
If ABS inter venes, you will feel a pulsing in the
brake pedal. The pulsating brake pedal may be an
indication of hazardous road conditions and func‐
tions as a reminder totake extra care while driv‐
ing.
If ABS in terv enes: keep the brake pedal firm ly
depressed until the braking situation has passed.
To car ryout maximum full-s top braking:
dep ress the brake pedal with full forc e. Fu
nction of BAS (Brake Assist Sy stem) &
WARNING Risk of an accident caused by
a malfunction in BAS (Brake Assi stSys‐
te m)
If BA S is malfunctioning, the braking dis tance
in an emergency braking situation is
increased. #
Depress the brake pedal with full force
in emer gency braking situations. ABS
pr eve nts the wheels from locking. BA
S suppo rts yo u with additional braking forc e in
an emer gency braking situation.
If yo u depress the brake pedal quickl y,BA S is
acti vated:
R BAS au tomatically boosts the braking forc e of
th e brakes
R BAS can sho rten the braking dis tance
R ABS pr events the wheels from locking
When youre lease the brake pedal, the brakes
function as usual again. BAS is deactivated. 14 6
Driving and pa rking
Page 149 of 416

Fu
nctions of ASR (Acceleration Skid Control) ASR can neither
reduce therisk of an accident
nor override the la wsof ph ysics if the driver does
not pay attention when pulling away or accelerat‐
ing. ASR is only an aid. Alw ays adapt your driving
st yle to suit the pr evailing road and weather con‐
ditions.
If yo u activate or deactivate the all-wheel drive in
a ve hicle with this option, ASR will be deactivated
fo rth e duration of the activation/deactivation
process.
Ve hicles without steering wheel but tons: if
ASR is malfunctioning, the00E5 indicator lamp
lights up while the engine is running and the
engine output may be reduced (/ page 26).
ASR impr oves traction, i.e. the transfer of po wer
from the tires tothero ad sur face, for a sus tained
period and thereb y,also impr ovesth e driving sta‐
bility of theve hicle. If the drive wheels start to
spin, ASR brakes individual drive wheels and lim‐
its the engine torque. ASRthus significantly
assists you when pulling away and accelerating,
especially on wet or slippe ryroads.
If traction on thero ad sur face is not suf ficient,
eve n ASR will not allow youto pull away without
dif ficulty. The type of tires and totalwe ight of the
ve hicle as well as the gradient of thero ad also
play a crucial role.
If ASR inter venes, the00E5 warning lamp in the
Instrument Display flashes. Fu
nctions of ESP ®
(Electronic Stability Pro‐
gr am) &
WARNING Risk of skidding if ESP ®
is
malfunctioning
If ESP ®
is malfunctioning, ESP ®
cannot car ry
out vehicle stabilization. In addition, other
driving saf ety sy stems are switched off. #
Drive on carefull y. #
Have ESP ®
ch ecked at a qualified spe‐
cialist workshop. &
WARNING Risk of skidding if ESP ®
is
deactivated
If yo u deactivate ESP ®
, ESP ®
cannot car ryout
ve hicle stabilization. #
ESP ®
should only be deactivated in the
fo llowing situations. If
th e sur face requ ires, temp orarily deactivate
ESP ®
when pulling away ( / page 148).
Do not operate theve hicle on a roller dynamome‐
te r (e.g. for a per form ance test). If you ha veto
operate theve hicle on a roller dynamom eter, con‐
sult a qualified specialist workshop beforehand.
If yo u activate or deactivate the all-wheel drive in
a ve hicle with this option, ESP ®
will be deactiva‐
te dfo rth e duration of the activation/deactiva‐
tion process.
If ESP ®
is malfunctioning or deactivated, the
00E5 warning lamp lights up while the engine is
ru nning and the engine output may be reduced
(/ page 26).
% Only use wheels with
there commended tire
sizes. Only then will ESP ®
function properly.
ESP ®
can, within ph ysical limits, monitor and
impr ovedriving stability and traction in thefo l‐
lowing situations:
R When pulling away on wet or slippe ryroad
sur faces
R When braking
R Ifyo u are driving fasterthan 49.7 mph
(80 km/h) in stro ng crosswinds
If th eve hicle is deviating from the direction
desired bythe driver, ESP ®
can stabilize theve hi‐
cle byper form ing thefo llowing actions:
R One or more wheels are braked
R The drive sy stem per form ance is adap ted
depending on the situation
If ESP ®
is deactivated 00BB,the00E5 warning
lamp lights up con stantly in the Instrument Dis‐
play:
R Vehicle stabilization may be dela yed
R Crosswind Assist is still active
R The drive wheels may start tospin
R ASR traction control is no longer active
If ESP ®
is deactivated, ESP ®
will still support you
when braking.
If th e00E5 warning lamp in the Instrument Dis‐
play flashes, one or more wheels ha vereached
th eir tire traction limit:
R Adapt your driving style to suit the pr evailing
ro ad and weather conditions
R Do not deactivate ESP ®
under any circum‐
st ances Driving and parking
147
Page 150 of 416

Ac
tivating/deactivating ESP ®
(Electronic Sta‐
bility Prog ram) Multimedia sy
stem:
4 © 5
Settings 5
Quick Access
5 ESP
% ESP®
can only be activated and deactivated
via quick access when at least one other
function is available in quick access. Other‐
wise, you can find ESP ®
in theAssistance
menu. #
Select ESP.
A prom ptappears. #
Select Onor00BB Off.
If th e00BB ESP®
OFF warning lamp lights up con‐
st antly in the instrument clus ter,ESP ®
is deacti‐
va ted.
Obser vethe information on warning lamps and
display messages which may appear in the instru‐
ment clus ter. Fu
nctions of ESP ®
Crosswind Assist Crosswind Assist does not
react under thefo llow‐
ing conditions:
R The vehicle is subjected tosevere jolts and
vib rations, e.g. as a result of une ven su rfaces
or po tholes.
R The vehicle loses traction, e.g. on snow or ice
or when hydroplaning.
R The driver is per form ing sudden and lar ge
st eering mo vements.
Crosswind Assist is operational again as soon as
th e driving conditions return tonormal.
Crosswind Assi stdetects stro ng crosswind gu sts
th at can impair ability of your vehicle todrive
st ra ight ahead. Crosswind Assist inter venes
depending on the direction and stre ngth of the
crosswind.
A stabilizing brake application helps youto keep
th eve hicle on trac k.
Information is shown in the instrument clus ter in
th eeve nt of a clearly discernible inter vention by
Crosswind Assist.
Crosswind Assist is active abo veave hicle speed
of 50 mph (8 0 km/h) when driving stra ight or
slight lycornering. Fu
nction of ESP ®
trailer stabilization &
WARNING Risk of accident in poor road
and weather conditions
In poor road and weather conditions, the
trailer stabilization cannot pr event lu rching of
th eve hicle/trailer combination. Trailers with
a high cen ter of gr avity may tip over before
ESP ®
de tects this. #
Always adapt your driving style to suit
th e cur rent road and weather condi‐
tions. ESP
®
trailer stabilization coun tera cts critical driv‐
ing situations in good time and thereby pr ovides
considerable assis tance when driving wi th a
traile r. Trailer stabilization is part of ESP ®
.
If th e sensor sy stem and evaluation logic de tect
trailer swinging mo vements, ESP ®
trailer stabili‐
zation initially brakes individual vehicle wheels in
a ta rgeted manner. It thus coun tera cts swinging
mo vements. If the swinging mo vements do not
st op, theve hicle is braked until theve hicle/
trailer combination is stabilized. If necessar y,the
ve hicle's engine output is limited.
If yo ur vehicle with trailer (vehicle/trailer combi‐
nation) starts toswer ve,yo u are able tostabilize
th eve hicle/trailer combination only bybraking.
ESP ®
trailer stabilization helps youto stabilize
th eve hicle/trailer combination in this situation.
ESP ®
trailer stabilization is active at speeds
abo veappr oximately 40 mph (6 5 km/h).
If ESP ®
is deactivated because of a malfunction,
trailer stabilization will not function. Fu
nction of EBD (electronic brake forc e distri‐
bution) EBD has
thefo llowing characteristics:
R monitoring and controlling the braking force
on there ar wheels
R impr oving driving stabilization when braking,
especially on bends 14 8
Driving and pa rking
Page 151 of 416

Fu
nction of Active Brake Assi st Ac
tive Brake Assi stconsi sts of thefo llowing func‐
tions:
R Distance warning function
R Autonomous braking function
R Situation-dependent braking assis tance
Ac tive Brake Assi stcan help youto minimize the
ri sk of a collision with vehicles or pedestrians or
to reduce the ef fects of such a collision.
If Ac tive Brake Assi sthas de tected a risk of colli‐
sion, you will be warned visually and acousticall y.
If yo u do not react tothe visual or acoustic warn‐
ing, autonomous braking can be initiated in criti‐
cal situations.
If th ere are pedestrians and cyclists crossing: in
especially critical situations, Active Brake Assi st
can initiate au tonomous braking di rectl y.In this
case, the visual and acoustic warning occurs
simultaneously with the braking application.
If yo u apply the brake yourself in a critical situa‐
tion, or apply the brakes during autonomous
braking, situation-dependent braking assis tance
occu rs. The brake pressure increases up tomaxi‐
mum full-s top braking if necessar y.Situation-
dependent braking assis tance only inter venes
when the brakes are applied firm ly; otherwise, it
re mains within the autonomous braking process. &
WARNING Risk of accident caused by
limited de tection per form ance of Active
Brake Assi st
Ac tive Brake Assi stcannot al ways clea rly
identify objects and complex traf fic situa‐
tions. Due
tothe nature of the sy stem, complex
driving conditions may also cause Brake
Assist tointer vene or not inter vene wi thout
re ason. In such cases, and in theeve nt of
Ac tive Brake Assi stmalfunctioning, the brake
sy stem will continue tobe available with full
brake boost and BAS. #
Always pay careful attention tothe traf‐
fi c situation; do not relyonActive Brake
Assi stalone. Active Brake Assi stis only
an aid. The driver of theve hicle is
re sponsible forke eping a suf ficiently
safe dis tance totheve hicle in front, for
ve hicle speed and for braking in good
time. #
Be prepare dto brake or swer veif nec‐
essar y. Also obser
vethe sy stem limits of Active Brake
Assi st.
The individual subfunctions are available in
th efo llowing speed ranges:
Distance warning function
The dis tance warning function warnsyo u at
speeds greater than appr oximately 4 mph
(7 km/h), if your vehicle is critically close to a
ve hicle or pedestrian.
An intermittent warning tone sounds and the
00BA distance warning lamp lights up in the
instrument clus ter.
Brake immedia tely or take eva sive action, pr ovi‐
ded it is safe todo so and the tra ffic situation
allo ws th is.
The distance warning function can aid you in thefo llowing situations with an intermit tent wa rn‐
ing tone and a warning lamp: Ve
hicles tr avel‐
ing in front St
ationary vehi‐
cles Crossing
vehi‐
cles Crossing pedes‐
trians/cycli
stsSt
ationary
pedestrians
Up toappr ox.
15 5mph
(250 km/h) Up
toappr ox.
12 4mph
(200 km/h) No
reaction Uptoappr ox.
37 mph
(60 km/h) No
reaction Driving and parking
14 9
Page 152 of 416

Au
tonomous braking function
The autonomous braking function may inter vene at speeds starting from appr oxima tely 4mph
(7 km/h) in thefo llowing situations: Ve
hicles tr avel‐
ing in front St
ationary vehi‐
cles Crossing
vehi‐
cles Crossing pedes‐
trians/cycli
stsSt
ationary
pedestrians
Up toappr ox.
15 5mph
(250 km/h) Up
toappr ox.
12 4mph
(200 km/h) No
reaction Uptoappr ox.
37 mph
(60 km/h) No
reaction Situation-dependent braking assistance
Situation-dependent braking assistance may inter vene at speeds starting from appr oxima tely
4 mp h (7 km/h) in thefo llowing situations: Ve
hicles tr avel‐
ing in front St
ationary vehi‐
cles Crossing
vehi‐
cles Crossing pedes‐
trians/cycli
stsSt
ationary
pedestrians
Up toappr ox.
15 5mph
(250 km/h) Up
toappr ox.
50 mph
(80 km/h) No
reaction Uptoappr ox.
37 mph
(60 km/h) No
reaction Canceling a brake application of
Active Brake
Assi st
Yo u can cancel a brake application of Active
Brake Assi stat any time by:
R Fully depressing the accelerator pedal or with
kickdown.
R Fully releasing the brake pedal (only during
situation-dependent braking assis tance).
Ac tive Brake Assi stmay cancel the brake applica‐
tion when one of thefo llowing conditions is fulfil‐
led:
R You maneuver toavo idthe obs tacle.
R Thereis no longer a risk of collision.
R An obs tacle is no longer de tected in front of
yo ur vehicle.
Sy stem limits
The sy stem may be impaired or may not function
in thefo llowing situations:
R The sensors are af fected bysno w,rain, fog or
heavy spr ay.
R The sensors are dirty, fogged up, damaged or
co vered.
R The sensors are af fected byinter fere nce from
ot her radar sources, e.g. strongradar reflec‐
tions in parking garage s. R
If a loss of tire pressure or a faulty tire has
been de tected and displa yed.
R Full sy stem per form ance is not available for a
fe w seconds af ter switching on the ignition or
af te r driving off.
The sy stem may not react cor rectly in thefo llow‐
ing situations:
R In complex traf fic situations, objects may not
al wa ys be clear lyde tected.
R Pedestrians or vehicles mo vequickly into the
de tection range of the sensors.
R Pedestrians are obscured by other objects.
R In bends with a nar rowradius. Setting
Active Brake Assi st Requ
irements:
R The ignition is switched on.
Multimedia sy stem:
4 © 5
Settings 5
Assistance
5 Active Brake Assist
The following settings are available:
R Early
R Medium
R Late
R Off 15 0
Driving and pa rking