Page 72 of 400

72 Safety and SecurityDriving safety systems
Driving safety systemsIn this section you will find information on 
the following driving safety systems:
ABS (A
ntilock B
rake S
ystem)
BAS (B
rake A
ssist S
ystem)
ESP (E
lectronic S
tability P
rogram)
4MATIC (Four Wheel Electronic 
Traction System)
ABS
The Antilock Brake System (ABS) regulates 
the brake pressure so that the wheels do 
not lock during braking. This allows you to 
maintain the ability to steer your vehicle.
The ABS is functional above a speed of ap-
proximately 5 mph (8 km/h) independent 
of road surface conditions.
On slippery road surfaces, the ABS will 
respond even with light brake pressure.
The- indicator lamp in the instrument 
cluster (
page 22) comes on when you 
turn the SmartKey in the starter switch to 
position2. It goes out when the engine is 
running.
iIn winter operation, the maximum 
effectiveness of the ABS, ESP and 
4MATIC (if so equipped) is only 
achieved with winter tires (M + S tires), 
or snow chains as required.
Warning!
G
The following factors increase the risk of 
accidents:
Excessive speed, especially in turns
Wet and slippery road surfaces
Following another vehicle too closely
The ABS, BAS, ESP and 4MATIC (if so 
equipped) cannot reduce this risk.
Always adjust your driving style to the 
prevailing road and weather conditions.
Warning!
G
Do not pump the brake pedal. Use firm, 
steady brake pedal pressure instead. Pump-
ing the brake pedal defeats the purpose of 
the ABS and significantly reduces braking 
effectiveness. 
     
        
        Page 73 of 400

73 Safety and Security
Driving safety systems
Braking
At the instant one of the wheels is about to 
lock up, a slight pulsation can be felt in the 
brake pedal, indicating that the ABS is in 
the regulating mode.
Keep firm and steady pressure on the 
brake pedal while experiencing the 
pulsation.
Continuous steady brake pedal pressure 
yields the advantages provided by the ABS, 
namely braking power and ability to steer 
the vehicle.
The pulsating brake pedal can be an 
indication of hazardous road conditions 
and functions as a reminder to take extra 
care while driving.Emergency brake maneuver
Keep continious full pressure on the 
brake pedal.
For more information, see “Practical hints” 
(
page 274).
BAS
The Brake Assist System (BAS) operates in 
emergency situations. If you apply the 
brakes very quickly, the BAS automatically 
provides full brake boost, thereby poten-
tially reducing the braking distance. Apply 
continuous full braking pressure until the 
emergency braking situation is over. The 
ABS will prevent the wheels from locking.
When you release the brake pedal, the 
brakes function again as normal. The BAS 
is then deactivated.
Warning!
G
The ABS cannot prevent the natural laws of 
physics from acting on the vehicle, nor can 
it increase braking or steering efficiency 
beyond that afforded by the condition of the 
vehicle brakes and tires or the traction. The 
ABS cannot prevent accidents, including 
those resulting from excessive speed in 
turns, following another vehicle too closely, 
or hydroplaning. Only a safe, attentive, and 
skillful driver can prevent accidents. The 
capabilities of an ABS equipped vehicle 
must never be exploited in a reckless or 
dangerous manner which could jeopardize 
the user’s safety or the safety of others. 
     
        
        Page 103 of 400

103 Controls in detail
Lighting
Manual headlamp mode
The low beam headlamps and parking 
lamps can be switched on and off with the 
exterior lamp switch. For exterior lamp 
switch, see (
page 102).
Automatic headlamp mode
The parking lamps, low beam headlamps 
and license plate lamps switch on and off 
automatically depending on the brightness 
of the ambient light.
Turn the exterior lamp switch toU.
iIf you remove the SmartKey and open 
the driver’s door while the parking 
lamps or low beam headlamps are 
switched on, then
a warning sounds
$appears in the multifunction 
display 
the message 
TURN OFF LIGHTS!
 
appears in the multifunction display
iWith the daytime running lamp mode 
activated and the engine running, the 
low beam headlamps cannot be 
switched off manually.
Warning!
G
If the exterior lamp switch is set toU,
the headlamps may switch off unexpect-
edly when the system senses bright 
ambient light, for example light from 
oncoming traffic.
the headlamps will not be automatically 
switched on under foggy conditions. 
To minimize risk to you and to others, 
activate headlamps by turning exterior lamp 
switch toB when driving or when traffic 
and / or ambient lighting conditions require 
you to do so.
In low ambient lighting conditions, only 
switch from positionU toB with the 
vehicle at a standstill. Switching fromU 
toB will briefly switch off the head-
lamps. Doing so while driving in low ambient 
lighting conditions may result in an acci-
dent.
The automatic headlamp feature is only an 
aid to the driver. The driver is responsible for 
the operation of the vehicle's lights at all 
times. 
     
        
        Page 104 of 400

104 Controls in detailLightingDaytime running lamp mode
Turn exterior lamp switch to 
positionM orU.
When the engine is running, the low beam 
headlamps are automatically switched on. 
In low ambient light conditions the parking 
lamps will also switch on.Canada only
When you shift from a driving position to 
positionN orP, the low beam switches off 
(with a three-minute delay).
For nighttime driving you should turn the 
exterior lamp switch to positionB to 
permit activation of the high beam head-
lamps.
USA only
The high beam headlamps can also be 
activated when driving with the daytime 
running lamp mode activated and exterior 
lamp switch in positionM.
To activate the daytime running lamp 
mode, see “Setting daytime running lamp 
mode (USA only)” (
page 129).Locator lighting and night security 
illumination
Locator lighting and night security illumi-
nation are described in the control system 
section under “Setting locator lighting” 
(
page 130) and “Setting night security 
illumination” (
page 131).
Switching on fog lamps
iWith the daytime running lamp mode 
activated, the low beam headlamps will 
not switch off automatically.iThe front fog lamps and rear fog lamp 
cannot be switched on manually with 
exterior lamp switch in positionU. 
To activate the fog lamps, turn exterior 
lamp switch to positionB and pull 
the exterior lamp switch to first or 
second stop (
page 102).
iSee notes on the exterior lamp switch 
(page 102).
Warning!
G
In low ambient lighting or foggy conditions, 
only switch from positionU toB with 
the vehicle at a standstill. Switching 
fromU toB will briefly switch off the 
headlamps. Doing so while driving in low 
ambient lighting conditions may result in an 
accident. 
     
        
        Page 106 of 400

106 Controls in detailLightingSwitching on high beams
Turn exterior lamp switch to 
positionB or toU 
(page 102).
Push combination switch in direction of 
arrow1.
The high beam indicatorA on the 
instrument cluster comes on.
High beam flasher
Pull combination switch briefly in 
direction of arrow2.
Hazard warning flasher
The hazard warning flasher can be activat-
ed with the ignition switched on or off. It is 
activated automatically when an airbag is 
deployed.
The switch is located on the center con-
sole.
1Hazard warning flasher switchSwitching on the hazard warning 
flasher
Press hazard warning flasher switch.
All turn signals will flash.
Switching off the hazard warning 
flasher
Press hazard warning flasher switch 
again.iWith the hazard warning flasher acti-
vated and the combination switch set 
for either left or right turn, only the re-
spective left or right turn signals will 
operate when the SmartKey in the 
starter switch is in position1 or2.iIf the hazard warning flasher was 
activated automatically, also press 
switch1 to switch off the hazard 
warning flasher. 
     
        
        Page 149 of 400

149 Controls in detail
Good visibility
Rear view mirrors
More information for setting the rear view 
mirrors can be found in the “Getting 
started” section (
page 38).
Interior rear view mirror, antiglare 
position
1Lever
Tilt the mirror to the antiglare night 
position by moving lever1 towards 
the windshield.Automatic antiglare rear view mirrors*
The reflection brightness of the exterior 
rear view mirror on the driver’s side and 
the interior rear view mirror will respond 
automatically to glare when
the ignition is switched on
and
incoming light from headlamps falls on 
the sensor in the interior rear view 
mirror.The rear view mirror will not react if
reverse gear is engaged
the interior lighting is turned onWarning!
G
The automatic antiglare function does not 
react if incoming light is not aimed directly 
at sensors in the interior rear view mirror.
The interior rear view mirror and the exterior 
rear view mirror on the driver’s side do not 
react, for example, if the rear window 
sunshade* is in raised position.
Glare can endanger you and others. 
     
        
        Page 151 of 400
151 Controls in detail
Good visibility
The exterior rear view mirror returns to its 
previously stored driving position:
ten seconds after you put the gear 
selector lever out of positionR
immediately once your vehicle exceeds 
a speed of approximately 6 mph 
(10 km/h)
immediately when you press button1 
for driver’s side mirror
Sun visors
The sun visors protect you from sun glare 
while driving.
Swing sun visors down when you 
experience glare.1Mounting
2Mirror cover
3Mirror lamp
4Sun visor
To use illuminated mirror, lift up 
cover2.
Warning!
G
Do not use the vanity mirror while driving.
Keep the mirrors in the sun visors closed 
while vehicle is in motion. Reflected glare 
can endanger you and others.
iIf sunlight enters through a side 
window, disengage sun visor from 
mounting1 and pivot to the side.
The mirror lamp3 will switch off. 
     
        
        Page 190 of 400

190 Controls in detailAudio systemOnly use original CDs. Using copied CDs 
may create problems during playback.
Clean CDs from time to time with a com-
mercially available cleaning cloth. Do not 
use solvents, anti-static sprays, etc. for 
cleaning. Replace the CD in its case after 
use. Protect CDs from heat and direct sun-
light.
Only use CDs, which bear the label shown 
and that conform to the compact disc 
digital audio standard (IEC 60908). You 
can therefore only use CDs with a maxi-
mum thickness of 1.3 mm.Operational readiness of CD changer
If a CD changer has been installed in the 
system, it can be operated from the front 
control panel of the radio. A loaded maga-
zine must be installed to play CDs.
Loading/unloading the CD magazine
Slide changer door to the right and 
press eject buttong.
The magazine will be ejected.
iUse of CDs which do not meet this 
standard may cause damage to the CD 
changer. Do not play single-CDs 
(80 mm) with an adapter.
Your CD drive has been designed to 
play CDs which correspond to the 
EN 60908 standard.
If you insert thicker data carriers, e.g. 
ones that have data on both sides (one 
side with DVD data, the other side with 
audio data), they cannot be ejected and 
will damage the drive.Warning!
G
The CD changer* is a Class 1 laser product. 
There is a danger of invisible laser radiation 
if the cover is opened or damaged.
Do not remove the cover. The CD changer* 
does not contain any parts which can be ser-
viced by the user. For safety reasons, have 
any service work which may be necessary 
performed only by qualified personnel.