
G
WARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of an accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Vehicles without steering wheel buttons: if
the BAS driving safety system is
malfunctioning, the 000Awarning lamp lights
up while the engine is running (Y page 210).
BAS operates in emergency braking
situations. If you depress the brake quickly,
BAS automatically increases the brake
pressure, thereby reducing the stopping
distance.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated. EBD (electronic brake force
distribution)
Note the section on 'Important safety notes'
(Y page 56). G
WARNING
If EBD has malfunctioned, the rear wheels can
still lock, e.g. under full braking. This
increases the risk of skidding and an accident.
You should therefore adapt yourd riving style
to the different handling characteristics. Have
the brake system checked at a qualified
specialist workshop.
EBD monitors and controls the brake
pressure to the rear wheels. This enables EBD
to improve handling during braking.
Observe the information on warning and
indicator lamps (Y page 210). ESP
®
(Electronic Stability Program)
Note the section on 'Important safety notes'
(Y page 56). G
WARNING
If ESP ®
is malfunctioning it willn ot provide
any vehicle stabilization. There is an increased
risk of skidding or of an accident.
Exercise caution when continuing to drive.
Have ESP ®
checked at a qualified specialist
workshop.
! Only operate the vehicle briefly
(maximum of 10 seconds) on a brake
dynamometer. The key must be turned to
position 1in the ignition lock during this
time. You could otherwise damage the
drive train or the brake system.
! Do not run the vehicle on a roller
dynamometer (e.g. for performance tests).
If you must operate the vehicle on a roller
dynamometer, please consult a qualified
specialist workshop in advance. You could
otherwise damage the drive train or the
brake system.
If you activate or deactivate ESP ®
in a vehicle
with engageable all-wheel drive, ESP ®
will be
deactivated for the duration of the
activation/deactivation process.
If ESP ®
is malfunctioning, the 0002indicator
lamp lights up while the engine is running and
the engine power may be reduced
(Y page 210).
ESP ®
monitors driving stability and detects a
tendency of the vehicle to understeer or
oversteer (skidding) in good time. If ESP ®
detects that the vehicle is deviating from the
direction desired by the driver, one or more
wheels are braked to stabilize the vehicle. The
engine output is also modified to keep the
vehicle on the desired course within physical
limits. ESP ®
greatly assists you when driving
on wet or slippery road surfaces. ESP ®
also
stabilizes the vehicle when braking.
The 000D warning lamp in the instrument
cluster flashes when ESP ®
is intervening. Driving safety systems
57Safety Z

If ESP
®
intervenes:
X Do not deactivate ASR under any
circumstances.
X When driving off, apply as little throttle as
possible.
X Adapt yours peed and driving style to the
prevailing road conditions.
i Only use wheels with the recommended
tire sizes. Only then will ESP ®
function
properly. ASR (acceleration skid control)
General notes Important safety notes
Note the section on 'Important safety notes'
(Y
page 56).
ASR can neither reduce the risk of an accident
nor suspend the laws of physics if the driver
does not pay attention when pulling away or
accelerating. ASR is only an aid. Always adapt
your driving style to suit the prevailing road
and weather conditions.
Vehicles without steering wheel buttons: if
ASR is malfunctioning, the 000Aindicator
lamp lights up while the engine is running and
the engine power may be reduced
(Y page 210).
ASR significantly improves traction, i.e. the
transmission of power from the tires to the
road surface, and thus increases the vehicle's
driving stability. If the driving wheels start to
spin, ASR brakes individual drive wheels and
limits the engine torque. ASR thus
significantly assists you when pulling away
and accelerating, especially on wet or
slippery roads.
If traction on the road surface is not sufficient,
even ASR will not allow you to pull away
without difficulty. The type of tires and total
weight of the vehicle as well as the gradient
of the road also play a crucial role. If ASR intervenes, the
000Dwarning lamp in
the instrument cluster flashes.
Activating/deactivating ASR G
WARNING
If deactivated, ASR will not attempt to
stabilize the vehicle during pulling away and
acceleration. There is an increased risk of
skidding and of an accident.
Only deactivate ASR in the situations
described in the following.
! If you deactivate ASR, ESP ®
will still
intervene to stabilize the vehicle. Frequent
braking automatically triggered by ESP ®
can damage the brake system.
For this reason, deactivate ASR only briefly
and when absolutely necessary. When ESP
®
is intervening and the 000D
warning lamp in the instrument cluster is
flashing, leave ASR on. In this case, only
depress the accelerator pedal as far as
required when pulling away.
X Press the 0006button.
If ASR is deactivated, the 000Dwarning
lamp in the instrument cluster lights up.
ASR is automatically activated when the
engine is started.
It may be best to deactivate ASR briefly in the
following situations:
R when using snow chains
R in deep snow
R on sand or gravel 58
Driving safet
ysystemsSafety

i
Only switch the vehicle to de-energized
using the battery main switch if:
R the vehicle is stationary for a lengthy
period
R it is absolutely necessary
After the power supply has been activated,
you will need to reset the side windows
(Y page 77).
Switching off the power supply !
When you clamp the connector under the
accelerator pedal, make sure that the
connector does not become damaged or
dirty. It may otherwise not be possible to
restore the electrical connection when the
parts are reassembled. Battery isolating switch in the driver's footwell, on
the right-hand side next to the accelerator pedal
X Remove the key from the ignition lock and
waitf or about 20 seconds.
X Press and hold button 0006and unplug
connector 0005from the earth pin.
X Clamp connector 0005under the accelerator
pedal so that it cannot make contact with
the earth pin.
All starter battery consumers are
disconnected from the power supply. Switching on the power supply X
Insert the key into the ignition lock.
X Press connector 0005onto earth pin 0006until
you feel it engage and the lock inhibitor is
released.
Connector 0005must be in full contact with
earth pin 0006.
All consumers are reconnected to the DC
power supply. Key positions
0011
To insert/remove the key, to lock the
steering wheel
0008 To unlock the steering wheel, power
supply for some consumers (e.g. the
radio)
0009 To switch on the ignition, power supply for
all consumers, preglow and drive position
000A To start the engine
On vehicles with a battery main switch, you
must first switch on the power supply
(Y page 132). Driving
133Driving and parking Z

X
Apply the parking brake.
X Turn the key to position 0in the ignition
lock and remove it.
The immobilize ris activated.
X Secure the vehicle to prevent it from rolling
away (Y page 145). Wheel chock
Use the wheel chock or asimilar object to
prevent the vehicle fro mrolling away, e.g.
when parking or changing awheel. Wheel chock in the load/passenger compartment
X To remove the wheel chock on Cargo
Vans/Passenger Vans: pull restraining
cable 0005down a little and remove it from
retainer 0006.
X Remove the chock.
i When stowing the wheel chock, make
sure that restraining cable 0005is holding it
securely in retainer 0006. Wheel chock to the rear of the chassis on the left
side of the vehicle X
To remove the wheel chock on Chassis
Cabs: pull the locking springs down and
remove the wheel chock.
i When stowing the wheel chock, make
sure that it is secured in the retainer with
the locking springs. Parking the vehicle for
along period
If you leave the vehicle parked for longer than
4w eeks, the battery may be damaged by
exhaustive discharging.
X Disconnect the batter y(Ypage 251) or
switch off the battery main switch
(Y page 132).
Or
X Connect the battery to a trickle charger.
You can obtain information about trickle
chargers from a qualified specialist
workshop.
If you leave the vehicle parked for longer than
6w eeks, the vehicle may suffer damage as a
result of lack of use.
X Visit a qualified specialist workshop and
seek advice. Driving tips
General notes
Important safety notes G
WARNING
The driver's attention to the road must always
be his/her primary focus when driving. For
your safety and the safety of others, we
recommend that you pull over to a safe
location and stop before placing or taking a
telephone call. If you choose to use the
telephone while driving, please use the hands-
free device and only use the telephone when
road, weather and traffic conditions permit.
Some jurisdictions prohibit the driver from
using a mobile phone while driving a vehicle. Driving tips
147Driving and parking
Z

Deactivating cruise control
There are various ways to deactivate cruise
control:
X Briefly press the cruise control lever
forwards 0025.
Or
X Apply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off
the engine.
Cruise control is deactivated automatically
when:
R you apply the brakes
R you apply the parking brake and the 000B
indicator lamp in the instrument cluster
lights up
R you are driving slower than 20 mph
(30 km/h)
R you shift the automatic transmissio nto
neutral position Nwhile the vehicle is in
motion
R ESP ®
or ASR intervenes
R there is a malfunction in the ESP ®
, ASR or
ABS system
Problems with cruise control On vehicles with steering wheel buttons, the
speed canno
tbe set when cruise control is
activated.
The display is showing a message of high
priority and cannot therefore show a change
in speed.
X Proceed as instructed by the message in
the display.
X Deactivate cruise control PARKTRONIC
Important safety notes PARKTRONIC is only an aid. It cannot replace
your own awareness of the immediate
surroundings. You are responsible for safe maneuvering, parking and pulling away. When
maneuvering, parking and pulling away, make
sure that there are no persons, animals or
objects in the maneuverin
garea.
PARKTRONIC does not account for obstacles
that are:
R beneath its detection range, e.g. persons,
animals or objects
R above its detection range, e.g. overhanging
loads, overhangs or truck loading ramps
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates the distance
between yourv ehicle and an objec tvisually
and audibly.
Your vehicle features two separate sound
emitters with different frequencies for the
warning tones. The warning ranges in front of
and behind the vehicle are indicated by
different warning tones.
PARKTRONIC is activated automatically when
you:
R tur nthe key to position 2in the ignition lock
R release the parking brake and
R move the selector lever to D,Nor R.
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). PARKTRONIC is
reactivated at speeds below 10 mph
(16 km/h).
PARKTRONIC monitors the area around your
vehicle with sensors in the front and rear
bumpers.
Range of the sensors !
Pay particular attention to obstacles
above or below the sensors when parking,
such as flower pots or trailer towbars.
PARKTRONIC does not recognize such
objects when they are in the immediate
vicinity of the vehicle. You could damage
the vehicle or objects. Driving systems
157Driving and parking Z

Display messages on vehicles wit
hsteering wheel buttons
Safety systems Display messages Possible causes/consequences and
0004 Solutions
ABS
Visit workshop ABS has been deactivated due to a malfunction. ESP
®
, ASR and
BAS, as well as cruise control, have also been deactivated as a
result.
G WARNING
The brake system continue sto function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This causes steerability and braking to be greatly impaired. The
braking distance can increase in emergency braking situations.
The driven wheels can spin when accelerating.
If ESP ®
is not operational, ESP ®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X Drive on with care.
X Visit a qualified specialist workshop immediately. ABS
Unavailable ABS is temporarily unavailable. ESP
®
, ASR and BAS, as well as
cruise control, are also unavailable as a result.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This causes steerability and braking to be greatly impaired. The
braking distance can increase in emergency braking situations.
The driven wheels can spin when accelerating.
If ESP ®
is not operational, ESP ®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X Drive a short distance at a speed above 13 mph(20 km/h).
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on with care.
X Visit a qualified specialist workshop immediately. Display messages
197On-board computer and displays Z

Display messages Possible causes/consequences and
0004 Solutions
ABS
Unavailable AB
Sh as been deactivated due to undervoltage. ESP ®
, ASR and
BAS, as well as cruise control, are also unavailable as a result.
The battery may no tbe being charged.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
This causes steerability and braking to be greatly impaired.
The braking distance can increase in emergency braking
situations.
The driven wheels can spin when accelerating.
If ESP ®
is not operational, ESP ®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X Drive on with care.
X Visit a qualified specialist workshop immediately. 000A
Visit workshop ASR has been deactivated due to a malfunction.
The engine power output may be reduced.
G WARNING
The driven wheels can spin when accelerating.
There is an increased risk of skidding and accidents.
X Drive on with care.
X Visit a qualified specialist workshop immediately. 000A
Visit workshop BASh
as been deactivated due to a malfunction.
G WARNING
The brake system continues to function normally, but without
electronic support.
The braking distance can increase in emergency braking
situations.
There is a ris kofanaccident.
X Drive on with care.
X Visit a qualified specialist workshop immediately. 198
Display messagesOn-board computer and displays

Problem Possible causes/consequences and
0004 Solutions
000D
The yellow ASR/
ESP®
warning
lamp flashes
while the vehicle
is in motion. G
WARNING
ESP ®
or ASR is intervening because at least one of the wheels has
reached its tire grip limit.
Cruise control is deactivated for the duration of the intervention.
X Adapt your driving style to suit the road and traffic conditions.
Do not use too much throttle.
X Drive slowly. 000D
The yellow ASR/
ESP®
warning
lamp is lit while
the engine is
running. ASR is deactivated.
G WARNING
The driven wheels can spin when accelerating.
There is an increased risk of skidding and accidents.
X Activate ASR again. Exceptions (Y page 58).0002
000E000A0008
The yellow ESP ®
, ABS
and ASR/BAS indicator
lamps and the red
brake system indicator
lamp are lit while the
engine is running. EBD is malfunctioning or deactivated due to undervoltage or
malfunction.
The battery may not be being charged.
G WARNING
The rear wheels could lock sooner than expected when you apply
the brakes. The braking distance can increase in emergency
braking situations.
There is an increased risk of skidding and accidents.
X Vehicles with steering wheel buttons: also observe the
messages in the display (Y page 192).
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Do not drive on.
X Consult a qualified specialist workshop. 210
Indicator and warning lamps in the instrument clusterOn-board computer and displays