Page 283 of 380
Braking and parking
pressure on the brake pedal and allow for
l onger st
opping dist ances.
L o
w brake fluid level
Malfunctions can occur in the brake system if
the brake fluid level is too low. The brake fluid
level is monitored electronically.
Brake servo
The brake servo increases the pressure you
apply to the brake pedal. It works only when
the engine is running. WARNING
Any anomaly in the brake system can in-
crease the braking distance , with the r
e-
sulting risk of an accident.
Page 284 of 380
Driving
Applying the electronic parking brake
The el ectr
onic parking br ak
e can be activ
a-
ted whenever the vehicle is at a standstill,
even when the ignition is switched off. Acti-
vate it whenever you leave or park the vehi-
cle.
Page 287 of 380

Braking and parking
virtual standstill. You can continue to steer the
v ehicl
e ev
en when the br
akes are on full.
Keep your foot on the brake pedal and do not
pump the brakes. You will feel the brake pedal
pulsate while the ABS is working.
If the running gear or brake system is modi-
fied, the effectiveness of the ABS could be se-
verely limited.
Hydraulic Brake Assist (HBA)
The brake assist system can reduce the re-
quired braking distance. The braking force is
automatically boosted if you press the brake
pedal quickly in an emergency. You must
keep pressing the brake pedal until the dan-
ger has passed.
Traction control system (ASR)
In the event of wheelspin, the traction control
system reduces the engine torque to match
the amount of grip available. This helps the
car to start moving, accelerate or climb a
gradient.
Electronic differential lock (EDL)
When the EDL detects wheelspin, it brakes
the spinning wheel and directs the power to
the other driven wheel. This function is active
up to approximately 100 km/h (62 mph).
To prevent the disc brake of the braked wheel
from overheating, the EDL cuts out automati-
cally if subjected to excessive loads. The ve- hicle can still be driven. The EDL will switch on
again automatically when the brake has
cooled do
wn.
Electronic engine torque management
(XDS)
When taking a curve, the driveshaft differen-
tial allows the outer wheel to turn at a higher
speed than the inner wheel. In this way, the
wheel that is turning faster (outer wheel) re-
ceives less drive torque than the inner wheel.
This may mean that in certain situations the
torque delivered to the inner wheel is too
high, causing the wheels to spin. On the other
hand, the outer wheel is receiving a lower
drive torque than it could transmit. This can
cause a loss of grip on the drive axle, in this
case the front axle, which results in under-
steer or “lengthening” of the trajectory.
The XDS can detect and correct this effect
via the sensors and signals of the ESC.
Via the ESC, the XDS will brake the inside
wheel and counter the excess driving torque
of that wheel. This means that the requested
trajectory is much more precise.
XDS works in combination with the ESC and is
always active, even when ASR is disconnec-
ted, or when the ESC is in Sport mode or dis-
connected. WARNING
Driving at high speed on icy, slippery wet
ground can result in loss of v ehicl
e control
and serious injury to the driver and passen-
gers.
Page 288 of 380
Driving
maintained or are not functioning correct-
ly. This includes, among others, brakes,
tyr
es and other syst
ems already men-
tioned.
Page 293 of 380
Help with parking and manoeuvring
Braking to avoid damage due to unsuitable
speed
It is possibl e that the syst
em operat
es the
br
akes to reduce excess speed. The parking
manoeuvre can then continue. The brakes
will intervene during each parking process.
Braking to minimise damage
When approaching an obstacle, the vehicle
may brake automatically. In certain circum-
stances (e.g. storm, detection of ultrasounds,
vehicle status, load, inclination), the Park As-
sist system may stop the vehicle completely
before an object.
Page 302 of 380
Driving
Trailer brakes
If the tr ail
er has its o wn br
ak
e system, please
take the relevant legal requirements into ac-
count. Never connect the trailer
Page 325 of 380
Checking and refilling levels
Brake fluid Check and r efill the br
ake fluid Fig. 293
Engine compartment: brake fluid res-
erv oir cap . The brake fluid reservoir is located in the en-
gine compartment
Page 361 of 380

Index
Index
Numbers and Symbol s
4Driv e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . 254
A
ABS see Anti-l
ock brake system . . . . . . . . . . . . . . . . 284
ACC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . 263 radar sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Access aid for the third row of seats . . . . . . . . . 135
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 344
Active cylinder management (ACT) status indication . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Adaptive Cruise Control . . . . . . . . . . . . . . . . . . . . 263 control and warning lamp . . . . . . . . . . . . . . . . 264
indications on the screen . . . . . . . . . . . . . . . . . 265
malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. 263
operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
radar sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
special driving situations . . . . . . . . . . . . . . . . . . 269
temporarily deactivating . . . . . . . . . . . . . . . . . . 268
AdBlue control and warning lamps . . . . . . . . . . . . . . . . 312
information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
311
loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . 312
minimum filling capacity . . . . . . . . . . . . . . . . . . . 311
specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . 312
tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311
Additional heating automatic disconnection . . . . . . . . . . . . . . . . . . . 79
see also Auxiliary heating . . . . . . . . . . . . . . . . . 166 Adjust
fold down the front passenger