Exterior view
21Function Page
1 Luggage compartment/
boot Opening and closing 70
Spare wheel 254
Vehicle tool kit 254
Vehicle battery 329
2 Rear lights
311
3 Rear window heating
175
4 Fuel filler flap
218
Fuel requirements 219
5 Opening and closing the
doors 66
6 Demisting the windscreen
174
Cleaning the windows 246
7
Sliding/tilting sunroof* 180
Panorama sliding sunroof*
183 Function Page
8 Exterior mirrors
91
Parking aid* 92
9 Windscreen wipers, opera-
tion
105
Cleaning the wiper blades 246
Replacing the wiper blades 315
a Opening the bonnet
222
Engine oil 223
Coolant 225
b Front lights
311
c Fitting the front towing eye
337
d Tyres and wheels
227
Checking the tyre pressure 229
Flat tyre, fitting the spare
wheel
317
e Fitting the rear towing eye
337 At a glance
* optional
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Instrument cluster
27Function Page
1 Turn signal indicator lamp,
left
101
2
ESP
®
warning lamp 285
3 Segments
4
Distance warning lamp*
1 286
5 Turn signal indicator lamp,
right
101
6 SRS warning lamp
289
7 ABS warning lamp
285
8 Seat belt warning lamp
290
9 Coolant temperature gauge
120
a Coolant warning lamp
287
b Main-beam indicator lamp
101
c Dipped-beam indicator
lamp
99 Function Page
d Rev counter
121
e Multi-function display
123
f Trip meter
121
g Depending on the setting in
the on-board computer:
134
• Outside temperature
2 • Digital speedometer
h Standard display
125
j
Automatic transmission*:
gearshift program display
115
k Total distance recorder
l
Automatic transmission*:
selector lever position dis-
play
115
m Speedometer Function Page
n Engine diagnostic warning
lamp
288
o Tyre pressure warning
lamp*
289
p Brake system warning lamp
286
q Clock
135
r Reserve fuel warning lamp
291
s Fuel gauge
t Reset button
120
u Diesel engine: preglow indi-
cator lamp
111
1
On vehicles without Distronic*, the symbol lights up briefly but has no function.
2 Vehicles for the United Kingdom: the speed in km/h is always shown instead of the outside temperature. At a glance
* optional
211_AKB; 2; 5, en-GB
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Instrument cluster
29Function Page
1 Turn signal indicator lamp,
left
101
2
ESP
®
warning lamp 285
3 Segments
4
Distance warning lamp*
3 286
5 Turn signal indicator lamp,
right
101
6 SRS warning lamp
289
7 ABS warning lamp
285
8 Seat belt warning lamp
290
9 Coolant temperature gauge
120
a Coolant warning lamp
287
b Main-beam indicator lamp
101
c Dipped-beam indicator
lamp
99 Function Page
d Rev counter
121
e Multi-function display
123
f Trip meter
121
g Depending on the setting in
the on-board computer:
134
• Outside temperature
4 • Digital speedometer
h Standard display
125
j
Automatic transmission*:
gearshift program display
115
k Total distance recorder
l
Automatic transmission*:
selector lever position dis-
play
115
m Speedometer Function Page
n Engine diagnostic warning
lamp
288
o Tyre pressure warning
lamp*
289
p Brake system warning lamp
286
q Clock
135
r Reserve fuel warning lamp
291
s Fuel gauge
t Reset button
120
u Diesel engine: preglow indi-
cator lamp
111
3
On vehicles without Distronic*, the symbol lights up briefly but has no function.
4 Vehicles for the United Kingdom: the speed in km/h is always shown instead of the outside temperature. At a glance
* optional
211_AKB; 2; 5, en-GB
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Occupant safety
41deceleration force would normally be high
enough to trigger the systems, or they
could be triggered unintentionally. Never
carry out any modifications on the restraint
systems.
Never tamper with electronic components
and their software.
SRS (Supplemental Restraint System)
The SRS reduces the risk of occupants com-
ing into contact with the vehicle's interior in
the event of an accident. It can also reduce
the forces to which occupants are subjected
during an accident.
The SRS consists of:
R the 1 warning lamp
R belt tensioners
R belt force limiters
R airbags
The 1 1 warning lamp The SRS functions are checked regularly
when you turn on the ignition and when the
engine is running. Malfunctions can therefore
be detected in good time. The
1 warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started. G
Risk of injury
If SRS is malfunctioning, individual systems
may be activated unintentionally or not be
triggered in the event of an accident with
heavy braking.
A malfunction has occurred if the 1
warning lamp:
R does not light up when you switch on the
ignition
R does not go out after the engine has been
running for a few seconds
R lights up again once the engine is running
In this case, have SRS checked immedi-
ately at a qualified specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags In the event of a collision, the sensor in the
airbag control unit evaluates important phys-
ical data such as duration, direction and force
of the vehicle deceleration or acceleration.
Based on the evaluation of this data, and depending on the vehicle's rate of longitudi-
nal deceleration in a collision, the airbag con-
trol unit pre-emptively triggers the belt
tensioners in the first stage.
i
The front belt tensioners can only be trig-
gered if the belt tongue is correctly
engaged in the seat belt buckle.
The front airbags are only deployed if there is
an even higher rate of vehicle deceleration in
a longitudinal direction.
Your vehicle has adaptive, dual stage front
airbags. When the first activation threshold
has been reached, the front airbag is filled
with enough propellant gas to minimise the
risk of injury. The front airbag is only fully
inflated if a second threshold is reached
within a few milliseconds, due to the control
unit having detected further deceleration.
Criteria for triggering belt tensioners and
airbags
In the first stage of a collision, the airbag con-
trol unit evaluates the duration and direction
of vehicle acceleration or deceleration in
order to determine whether it is necessary to
trigger the belt tensioner and/or airbag.
The belt tensioner and airbag triggering
thresholds are variable and are adapted to the
rate of deceleration of the vehicle. This proc- Safety
211_AKB; 2; 5, en-GB
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Occupant safety
42
ess is pre-emptive in nature as the airbag
must be deployed during – and not at the end
of – the collision.
i Airbags are not deployed in all types of
accidents. They are controlled by complex
sensor technology and evaluation logic.
This process is pre-emptive in nature as
airbag deployment must take place during
the impact and must be adapted to provide
calculated, additional protection for the
vehicle occupants. Not all airbags are
deployed in an accident.
The different airbag systems work inde-
pendently of each other. However, the
deployment of each individual system will
depend on the type of accident determined
by the control system in the first stages of
the collision (head-on collision, side impact
and overturn) and the extent of the acci-
dent (in particular, the vehicle's rate of
deceleration or acceleration).
The rate of vehicle deceleration or accelera-
tion and the direction of the force are basi-
cally determined by:
R the distribution of forces during the colli-
sion
R the collision angle R
the deformation characteristics of the vehi-
cle
R the characteristics of the object with which
the vehicle has collided, e.g. the other vehi-
cle
Factors which can only be seen and measured
after a collision has occurred do not play a
decisive role in the deployment of an airbag,
nor do they provide an indication of it.
The vehicle may be deformed significantly,
e. g. on the bonnet or the wing, without an
airbag being deployed. This is the case if only
parts which are relatively easily deformed are
affected and the necessary deceleration does
not occur. Conversely, airbags may be
deployed even though the vehicle suffers only
minor deformations. This is the case if, for
example, very rigid vehicle parts such as lon-
gitudinal body members are affected and suf-
ficient deceleration occurs as a result.
Belt tensioners, belt force limiters The front seat belts and the outer seat belts
in the rear are equipped with belt tensioners.
!
Do not engage the seat belt tongue in the
buckle on the front-passenger seat if the
seat is not occupied. Otherwise the belt tensioner could be activated in an emer-
gency.
If the seat belt is also equipped with a belt
force limiter, the force exerted by the seat
belt on the seat occupant is reduced.
Belt tensioners tighten the seat belts in an
accident, pulling them close against the body.
i Belt tensioners do not correct incorrect
seat positions or incorrectly fastened seat
belts.
Belt tensioners do not pull occupants back
towards the backrest.
The front belt force limiters are synchronised
with the front airbags, which distribute the
forces exerted by the belt force limiters on
the occupant over a greater area.
When the ignition is switched on, the belt ten-
sioner is triggered:
R only if the restraint systems are operational
(the 1 warning lamp lights up after the
ignition is switched on and goes out once
the engine is running) (Y page 41)
R for each three-point seat belt in the front of
the vehicle when the belt tongue is
engaged in the buckle
R in the event of a head-on or rear-end colli-
sion if the vehicle decelerates or acceler- Safety
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Driving safety sys
tems60 ESP
®
(Electronic Stability Program)
ESP ®
monitors driving stability and traction,
i.e. power transmission between the tyres
and the road surface.
If ESP ®
detects that the vehicle is deviating
from the direction desired by the driver, one
or more wheels are braked to stabilise the
vehicle. The engine output is also modified, if
necessary, to keep the vehicle on the desired
course within physical limits. ESP ®
assists
the driver when pulling away on wet or slip-
pery roads. ESP ®
can also stabilise the vehi-
cle during braking.
When ESP ®
intervenes, the vwarning
lamp flashes in the instrument cluster. G
Risk of accident
If the v warning lamp in the instrument
cluster flashes, proceed as follows:
R Do not deactivate ESP ®
under any cir-
cumstances.
R Only depress the accelerator pedal as far
as necessary when pulling away.
R Adapt your driving style to suit the pre-
vailing road and weather conditions.
The vehicle could otherwise go into a skid. ESP
®
cannot reduce the risk of an accident
if you drive too fast. ESP ®
cannot override
the laws of physics.
! If the vehicle is to be towed with the front
or rear axle raised, the ignition must be
switched off (key in position 0or 1in the
ignition lock). Application of the brakes by
ESP ®
could otherwise destroy the brake
system on the front or rear axle.
! Vehicles with 4MATIC* may not be towed
with the front or rear axle raised.
i Only use wheels with the recommended
tyre sizes. Only then will ESP ®
function
properly.
Deactivating/activating ESP ® ESP
®
is activated automatically when the
engine is running.
It may be best to deactivate ESP ®
in the fol-
lowing situations:
R when using snow chains
R in deep snow
R on sand or gravel G
Risk of accident
Activate ESP ®
as soon as the situations
described above no longer apply. ESP ®
will
otherwise not be able to stabilise the vehi-
cle if the vehicle starts to skid or a wheel
starts to spin.
If you deactivate ESP ®
:
R ESP ®
no longer improves driving stability.
R engine torque is not limited and the drive
wheels are able to spin. The spinning
wheels produce a cutting effect for better
traction.
R traction control is still activated.
R ESP ®
still provides support when you
brake.
i If ESP ®
is deactivated and one or more
wheels start to spin, the vwarning lamp
in the instrument cluster flashes. In such
situations ESP ®
will not stabilise the vehi-
cle. Safety
* optional
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Driving safety sys
tems 611
Deactivating/activating ESP ®
X To deactivate: press button1.
The v warning lamp in the instrument
cluster lights up. G
Risk of accident
If the v warning lamp in the instrument
cluster is continuously lit when the engine
is running, ESP ®
is deactivated or not avail-
able due to a malfunction. There is an
increased risk of your vehicle skidding in
certain situations.
You should always adapt your driving style
to suit the prevailing road and weather con-
ditions. X
To activate: press button 1.
The v warning lamp in the instrument
cluster goes out. EBV (electronic brake-power distribu-
tion)
EBV monitors and controls the brake pres-
sure on the rear wheels to improve driving
stability under braking. G
Risk of accident
If EBV is malfunctioning, the brake system
is still available with full brake boosting
effect. However, the rear wheels can still
lock, e.g. under full braking. This could
cause you to lose control of your vehicle
and cause an accident. You should there-
fore adapt your driving style to the different
handling characteristics. ADAPTIVE BRAKE
Due to its higher level of braking safety,
ADAPTIVE BRAKE offers exceptional braking
comfort. In addition to the braking function,
ADAPTIVE BRAKE also features the conveni-
ence function HOLD (Y page 155). For fur-
ther information, see Driving tips
(Y page 236). Safety
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Anti-theft syste
ms 62 Anti-theft systems
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
Activating the immobiliser X
With the key: remove the key from the
ignition lock.
X With KEYLESS GO*: press the KEYLESS
GO button on the selector lever.
The engine switches off.
Deactivating the immobiliser X
With the key: turn the key to position 2in
the ignition lock.
X With KEYLESS GO*: press the KEYLESS
GO button on the selector lever twice with-
out depressing the brake.
i The immobiliser is always deactivated
when you start the engine. ATA* (anti-theft alarm system)
A visual and audible alarm is triggered if the
alarm system is primed and you open:
R a door
R a door using the emergency key element
R the boot lid/tailgate
R the bonnet
The alarm is not switched off even if you close
an open door again. 1
Indicator lamp
X To prime: lock the vehicle using the key.
On vehicles with KEYLESS GO*, the locking button on the door handle/boot lid/tail-
gate can also be used.
Indicator lamp
1flashes. The alarm sys-
tem is primed after approximately 15 sec-
onds.
X To deactivate: unlock the vehicle using the
key. On vehicles with KEYLESS GO*, you
can also unlock the vehicle by opening the
door/boot lid/tailgate.
Switching off the alarm X
With the key: insert the key into the igni-
tion lock.
The alarm is switched off.
or
X Press the Œor‹ button on the key.
The alarm is switched off.
X With KEYLESS GO*: pull the door handle.
The key must be outside the vehicle.
The alarm is switched off.
or
X Press the KEYLESS GO button on the selec-
tor lever. The key must be inside the vehi-
cle.
The alarm is switched off. Safety
* optional
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