
Operation
CAUTION
● To ens ur
e that the ESC works correctly, all
four wheels must be fitted with the same
tyres. Any differences in the rolling radius of
the tyres can cause the system to reduce en-
gine power when this is not desired.
● Any modifications made to the vehicle (for
exampl
e, to the engine, brake system, run-
ning gear or to the combination of wheels
and tyres) may affect the operation of the
ABS, EDL, ESC and ASR. Traction control system (ASR)*
The traction control system prevents the driv-
en wheel
s
fr om s
pinning when the vehicle is
accelerating. This system always includes
ABS.
Description and operation of the traction
control system during acceleration (ASR)
On front-wheel drive vehicles, the ASR sys-
tem intervenes, reducing engine power and
preventing the driven wheels from slipping
during acceleration. The system works in the
entire speed range in conjunction with ABS.
If a failure occurs in the ABS, the ASR will al-
so stop working.
TCS helps the car to start moving, accelerate
and climb a gradient in slippery conditions
where this may otherwise be difficult or even
impossible. The ASR automatically switches on when the
engine is s
tarted. If necessary, it could be
connected or disconnected by means of the
Easy Connect system.
When the ASR is off, the warning lamp lights
up . The ASR should normally be left on.
Only in exceptional circumstances, when
wheel spin is required, can they be turned off
using the ESC button, for example:
● With compact temporary spare wheel.
● When using the snow chains.
● When driving in deep snow or on soft ter-
rain.
● When the vehic
le is bogged-down, to free it
“by roc
king it.”
The ASR should be switched on again as
soon as possible.
Control lamp
There are two control lamps for the traction
control system: and . Both control lamps
light up together when the ignition is switch-
ed on and should turn off after approximately
2 seconds. This is the time taken for the func-
tion check.
The lamp has the following function:
● It flashes when the ASR is working if the ve-
hicle is
moving. If the system is deactivated or if it has any
fault, the warnin
g lamp will remain lit. The
warning lamp will also light up if a fault
should occur in the ABS because the ASR op-
erates in conjunction with the ABS. For fur-
ther information, see ››› page 156.
The lamp provides information about the
disconnection status of the system:
● It stays lit when the ASR is disconnected
via Ea
sy Connect.
By means of Easy Connect, the ASR function
is reactivated and the warning lamp switched
off. WARNING
● Remember that not
even the ASR can defy
the laws of physics. This should be kept in
mind, particularly on slippery and wet roads
and when towing a trailer.
● Always adapt your driving style to suit the
condition of the ro
ads and the traffic situa-
tion. The greater safety provided by the ASR
should not encourage you to run any risks. CAUTION
● To ens ur
e that the ASR works correctly,
identical tyres should be fitted on all four
wheels. Any differences in the rolling radius
of the tyres can cause the system to reduce
engine power when this is not desired. 156

Driving
How the ABS works
If one of
the wheel s
turns too slowly in rela-
tion to the vehicle's speed, and is close to
locking, the system will reduce the braking
pressure to this wheel. The driver is made
aware of this control process by a pulsating
of the brake pedal and audible noise. This is
a deliberate warning to the driver that one or
more of the wheels is tending to lock and the
ABS control function has intervened. In this
situation it is important to keep the brake
pedal fully depressed so the ABS can regu-
late the brake application. Do not “pump”.
If you brake hard on a slippery road surface,
the best possible control is retained as the
wheels do not lock.
However, ABS will not necessarily guarantee
shorter braking distances in all conditions.
Braking distance could even be further if you
brake on gravel or on fresh snow on a slip-
pery surface.
Control lamp
The control lamp lights up for a few sec-
onds when the ignition is switched on. It
goes out again after the system has run
through an automatic test sequence.
There is a fault in the ABS if:
● The control lamp does not light
up when
the ignition is switched on. ●
The control
lamp does not go out again af-
ter a few seconds.
● The control lamp lights up when the vehicle
is mov
ing.
The vehicle can still be braked in the normal
way, without the ABS function. Take the vehi-
cle to a specialised workshop as soon as
possible.
If there is a fault in the ABS, the ESC* and the
tyre pressure control lamp will also light up.
Brake system fault
If the ABS warning lamp lights up together
with the brake warning lamp , there is a
fault in the ABS function and in the brake
system ››› .
WARNING
● The anti-lock br ak
e system cannot defy the
laws of physics. Slippery and wet roads are
dangerous even with ABS! If you notice that
the ABS is working (to counteract locked
wheels under braking), you should reduce
speed immediately to suit the road and traffic
conditions. Do not let the extra safety fea-
tures tempt you into taking any risks when
driving.
● The effectiveness of ABS is also determined
by the tyr
es fitted ››› page 213.
● If the running gear or brake system is modi-
fied, the effectivenes
s of the ABS could be se-
verely limited. WARNING
● Befor e openin
g the bonnet, read and ob-
serve the warnings ››› page 201, Working in
the engine compartment.
● If the brake system warning lamp should
light up t
ogether with the ABS warning lamp
, stop the vehicle immediately and check
the brake fluid level in the reservoir
››› page 209, Brake fluid. If the brake fluid
level has dropped below the “MIN” mark you
must not drive on. Risk of accident. Obtain
technical assistance.
● If the brake fluid level is correct, the fault in
the brake sys
tem may have been caused by a
failure of the ABS system. This could cause
the rear wheels to lock quickly when you
brake. This could cause the rear to break
away. Risk of skidding. Stop the vehicle and
seek technical assistance. Electronic differential lock (XDS)*
When taking a curve, the driveshaft differen-
ti
al
mec h
anism allows the outer wheel to turn
at a higher speed than the inner wheel. In
this way, the wheel that is turning faster (out-
er wheel) receives 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 causes an overall loss of lateral »
159
Technical data
Advice
Operation
Emergencies
Safety

Driving
Manual gearbox Driv in
g w ith m
anual gearboxRead the additional information carefully
›››
p
age 37
Certain versions of the model may include a
6-speed manual gearbox, and its diagram is
shown on the gearbox lever.
The reverse gear can only be engaged when
the car is stationary. When the engine is run-
ning and before engaging this gear, wait
about 6 seconds with the clutch pressed
down thoroughly in order to protect the gear-
box.
The reverse lights switch on when the reverse
gear is selected and the ignition is on. WARNING
● When the engine is ru
nning, the vehicle
will start to move as soon as a gear is engag-
ed and the clutch released.
● Never select the reverse gear when the ve-
hicle is
in motion. Risk of accident. Note
● Do not re s
t your hand on the gear lever
while driving. The pressure of your hand
could cause premature wear on the selector
forks in the gearbox. ●
When chan gin
g gear, you should always
depress the clutch fully to avoid unnecessary
wear and damage.
● Do not “slip” the clutch to hold the vehicle
on a hill.
This causes premature wear and
damage to the clutch.
● Do not leave your foot on the clutch pedal;
although the pres
sure may seem insignifi-
cant, it can cause the premature wear of the
clutch plate. Use the foot rest when you do
not need to change gear. Gear-change indicator
3 Valid for vehicles: with a manual gearbox
The r ec
ommended gear for saving fuel is in-
dicated on the dash screen of certain vehi-
cles during driving.
DisplayMeaning
The optimal gear is selected.
Changing to a higher gear is recommended.
Changing to a lower gear is recommended.
Information regarding the “cleanliness” of
the die
sel
par
ticulate filter
The exhaust system manager detects that the
diesel particulate filter is nearly saturated
and contributes to self-cleaning by recom-
mending the optimal gear. For this purpose, it might be necessary to drive momentarily
with a high rpm
›››
page 170. WARNING
The gear change indicator is only an auxiliary
function and in no c a
se should be a substi-
tute for careful driving.
● The responsibility of choosing the correct
gear depending on the s
ituation (e.g. over-
taking, driving up or down a slope or towing a
trailer) lies with the driver. For the sake of the environment
Selecting the correct gear can help to save
fuel. Note
The recommended gear display is switched
off when the clut c
h pedal is pressed. Automatic gearbox*
Driv ing pr
ogr
ammes Read the additional information carefully
› ›
›
p
age 38
The automatic gearbox has got two gearbox
programmes. »
161
Technical data
Advice
Operation
Emergencies
Safety

Operation
Selecting the normal programme
– Put the selector lever into position D.
Sel ectin
g the s por
t programme
– Put the selector lever into position S.
If you sel
ect the normal programme, D, you
will drive in the economy mode, i.e. the pro-
gramme is designed to reduce fuel consump-
tion. The gearbox changes up into a higher
gear as soon as possible and down into a
lower gear as late as possible.
If you select the sport programme, S, you will
drive in a sporty mode, i.e. a programme in
which shifts into high gears are postponed in
order to use the full power of the engine.
Selector lever positions Read the additional information carefully
› ›
›
p
age 38
Selector lever positions
The selected gear is displayed on the side of
the selector lever and on the instrument pan-
el display. The currently selected gear for the
automatic gearbox will also be shown on the
display. Tiptronic gear indicator
If the automatic
gearbox is shifted manually,
the selected gears are shown on the screen.
P - parking lock
When the selector lever is in this position,
the driven wheels are locked mechanically.
Position P on the lever must only be selected
if the vehicle is stationary.
To move selector lever from position P, the
locking button on the selector lever handle
must be pressed and the brake pedal de-
pressed at the same time while the ignition is
switched on.
To put the selector lever in position P, simply
press the lock button down and, if necessary,
depress the brake pedal down.
R - Reverse gear
The reverse gear is engaged in this position.
Reverse gear must be engaged only when the
vehicle is stationary and the engine is idling.
To move the selector lever to position R,
press the lock button down and, at the same
time, press the brake pedal down, with the
ignition switched on.
With the selector lever in position R and the
ignition switched on the following occurs:
● Reverse lights light up. ●
The air conditioner automatic ally changes
the air recirculation mode.
● The wiper starts if the windscreen washer is
on.
● The parking distance warning system*
switche
s on.
N - Neutral (idling)
If this position is selected, the gearbox is in
neutral. Power is not transmitted to the
wheels and the engine does not have a brak-
ing function.
Never use the N position to drive down a long
hill. There is no engine braking and the
brakes are subjected to excessive stain.
You could damage the automatic gearbox if
you drive down hills with the gearbox lever in
position N and the engine switched off.
D - Drive (forward)
In this position the gearbox automatically
changes to a lower or higher gear, according
to the engine's requirements, the driving
style and speed. The braking effect of the en-
gine when driving downhill is very limited
when the selector is in this position. The in-
strument panel display shows the selected
gear as well as the selector lever in position
D.
When travelling at speeds lower than 5 km/h
(3 mph) or when the vehicle is stationary,
162

Driving
press the brake pedal to change the selector
l ev
er fr om po
sition N to position D.
S - Standard driving position (Sport pro-
gramme)
When the selector lever is in position S, it will
automatically change up into a higher gear
later, and change down into a low gear, if
compared with position D. This way, it is pos-
sible to take full advantage of the engine re-
serve power, depending on the engine de-
mand, driving style and speed. The braking
effect of the engine when driving downhill is
very limited. On the instrument panel display
the selected gear is shown as well as the se-
lector lever to position S.
To select gear range S, press the lock button
on the selector lever. WARNING
● As a driver ,
you should never leave your ve-
hicle if the engine is running and a gear range
is engaged. If you have to leave your vehicle
while the engine is running, you must apply
the parking brake and put the selector lever
in position P.
● If the engine is running and if D or R is en-
gaged, y
ou will need to hold the car on the
foot brake. The car will creep forward as the
power transmission is not fully interrupted
even when the engine is idling.
● Never accelerate when moving the selector
lever or y
ou may cause an accident. ●
Never mov e the sel
ector lever to R or P
when driving. Risk of accident!
● Before driving down a long, steep slope, it
is adv
isable to reduce speed and change into
a lower gear.
● If you stop the vehicle up hill, always hold
the foot brak
e strongly depressed down to
stop it from rolling back.
● Never allow the brake to rub and do not use
the brake peda
l too often or for long periods.
Constant braking will cause the brakes to
overheat and will considerably reduce the
brake effect. This increases the braking dis-
tance and could cause the brake system to
fail.
● Never allow the car to roll down a gradient
with the gear in neutr
al N, or in selector lever
position D, even if the engine is not running.
● If the vehicle moves with no control, an ac-
cident and serious
injury may occur. WARNING
Never switch the engine off until the vehicle
is s t
ationary. You could lose control of your
vehicle. This could cause an accident and se-
rious injury.
● The airbags and belt tensioners do not
work when the ignition is
switched off.
● The brake servo does not work with the en-
gine off. You need mor
e force to stop the vehi-
cle. ●
Pow er s
teering does not work when the en-
gine is not running. That is why it is much
more difficult to turn the steering wheel.
● Never remove the key from the ignition if
the vehicl
e is in motion. The steering lock
could suddenly engage, and you would not be
able to steer the vehicle. CAUTION
If you allow the vehicle to move when the en-
gine i s swit
ched off or with the selector lever
in position “N”, take your foot off the acceler-
ator and wait until the engine starts idling
before returning to position “D”. Selector lever lock
Fig. 170
Automatic gearbox The selector lever lock in position P or N pre-
v
ents
ge
ars from being engaged inadvertent-
ly, which would cause the vehicle to move. »
163
Technical data
Advice
Operation
Emergencies
Safety

Operation
The selector lever lock is released as follows: – Switch the ignition on.
– Press and hold the brake pedal and press
the sel ect
or l ev
er lock on the left of the se-
lector lever at the same time ››› Fig. 170.
The warning lamp on the instrument panel
lights up when the brake pedal should be ap-
plied. This is essential when the selector lev-
er is taken from the P or N positions.
Level lock only engages with the vehicle sta-
tionary at a speed of up to 5 km/h (3 mph).
At speeds of over 5 km/h (3 mph) the selec-
tor lever lock is automatically deactivated in
position N.
The selector lever lock is not engaged if the
selector lever is moved quickly through posi-
tion N (e.g. when shifting from R to D). This
makes it possible, for instance, to “rock” the
vehicle backwards and forwards if it is stuck
in snow or mud. The selector lever lock en-
gages automatically if the brake pedal is not
depressed and the lever is in position N for
more than about 1 second. Selecting gears manually with Tip-
tronic mode*
Fig. 171
Changing gear with Tiptronic. Fig. 172
Steering wheel with paddle levers
f or aut
omatic
gearbox. The Tiptronic system allows the driver to se-
l
ect
ge
ars manually. Changing gear with the selector lever
– Press the selector lever from position D to
the right into the tiptr
onic selector gate.
– Lightly press the selector lever forward
››› Fig. 171
+ to change up to a higher
g e
ar .
– Lightly
press the selector lever backward
››› Fig. 171
- to change down to a lower
g e
ar .
Ch
anging gear with the steering wheel pad-
dle levers*
– Press the right paddle lever + towards the
s t
eerin g wheel
to change up ››› Fig. 172.
– Press the left paddle lever - towards the
s t
eerin g wheel
to change down ››› Fig. 172.
Using the paddle levers on the steering
wheel, you can access manual driving mode
regardless of the pre-selected driving mode.
General information about driving in tiptron-
ic mode
When accelerating, the automatic gearbox /
DSG automatic gearbox goes into a higher
gear a little before the engine reaches its
maximum permitted revolutions.
If a lower gear is selected, the automatic
gearbox / DSG automatic gearbox will only
change down when the engine cannot go
over its maximum permitted revolutions.
164

Operation
put into a position for driving forwards or in
r ev
erse fr
om positions P or N if the brake
pedal is not depressed.
The ignition key cannot be removed unless
the selector lever is in position P.
Control lamp “Pressing brake pedal”
When the warning lamp next to the selector
lever lights up, press the brake pedal. This is
necessary when the automatic gearbox selec-
tor lever is moved out of positions P or N. A
text message or instructions to perform nec-
essary operations may appear on the instru-
ment panel. CAUTION
● If y ou s
top the vehicle up hills, do not at-
tempt to stop it from rolling back by depress-
ing the accelerator when a gear has been se-
lected. Otherwise, the automatic gearbox
may overheat causing damage. Pull the hand-
brake up or fully depress the brake pedal to
prevent the vehicle from rolling away.
● If you allow the vehicle to roll when the en-
gine is not ru
nning, or with the selector lever
in position N, a lack of lubrication in the auto-
matic gearbox will damage it. Kick-down feature
This feature allows maximum acceleration. If you press the accelerator down thoroughly,
the g
e
arbo x
automatically changes down, de-
pending on speed and engine speed, into a
lower gear to take full advantage of give the
vehicle maximum acceleration.
The gearbox does not change gear until the
engine reaches the maximum determined en-
gine speed for the gear. WARNING
You could lose control of the vehicle if you ac-
celer at
e on slippery road surfaces. Risk of se-
rious injury.
● Be particularly careful when using the kick-
down feat
ures on slippery road surfaces. With
a fast acceleration, the vehicle could lose
traction and skid.
● You should use the kick-down feature only
when traffic and we
ather conditions allow it
to be used safely. Gearbox malfunctions
Gearbox: Fault! Stop the ve-
hicle and place the lever in the
position P.
There is a f
ault in the gearbox. Stop the vehi-
cle in a safe place and do not continue driv-
ing. Seek specialist assistance.
Gearbox: System fault! You
may continue driving. Have the fault corrected by a specialised
workshop w
ithout
delay.
Gearbox: System fault! You
can continue driving with re-
strictions. Reverse gear disa‐
bled
Take the vehicle to a specialised workshop
and have the fault repaired without delay. Gearbox: System fault! You
can continue driving in D until
switching off the engine
Stop the vehicle in a safe place well away
from moving traffic. Seek specialist assis-
tance. Gearbox: too hot. Adapt your
driving accordingly
Continue driving at moderate speeds. When
the warning lamp switches off, you can con-
tinue driving in a normal manner. Gearbox: press the brake and
engage a gear again.
If the fault was caused by a gearbox with a
high temperature, this driver message will be
displayed when the gearbox has cooled
again.
166

Operation
Catalytic converter To maintain the useful life of the catalytic
conv
er
ter
– Use only unleaded petrol with petrol en-
gines, as l
ead damages the catalytic con-
verter.
– Do not let the fuel get too low in the tank.
– For engine oil changes, do not replenish
with too much en
gine oil ››› page 206, Top-
ping up engine oil.
– Never tow the vehicle to start it, use jump
lea d
s if necessary ›››
page 52.
If you notice misfiring, uneven running or
loss of power when the vehicle is moving, re-
duce speed immediately and have the vehi-
cle inspected at the nearest specialised
workshop. In general, the exhaust warning
lamp will light up when any of the described
symptoms occur ›››
page 100. If this hap-
pens, unburnt fuel can enter the exhaust sys-
tem and escape into the environment. The
catalytic converter can also be damaged by
overheating. CAUTION
Never run the fuel tank completely dry be-
cause the irr e
gularity of the fuel supply may
cause ignition problems. This allows unburnt
fuel to enter the exhaust system, which could
cause overheating and damage the catalytic
converter. For the sake of the environment
Even when the emission control system is
workin g per
fectly, there may be a smell of
sulphur from the exhaust gas under some
conditions. This depends on the sulphur con-
tent of the fuel used. Quite often the problem
can be solved by changing to another brand
of fuel. Diesel engine particulate filter*
Fig. 173
Vehicle data sticker on back cover of
the M aint
enanc
e Programme. Your vehicle is fitted with a DPF (Diesel Partic-
u
l
at e Fi
lter) if the vehicle data sticker (back
cover of the “Maintenance Programme”) lists
the code PR 7GG ››› Fig. 173.
The diesel engine particulate filter eliminates
most of the soot from the exhaust gas sys-
tem. Under normal driving conditions, the fil-
ter cleans itself. If this is not possible (for ex- ample, multiple short trips) the filter will be
obstruct
ed by soot and the diesel engine
particulate filter warning lamp will light up.
This does not represent a fault, it is a warning
that indicates that the filter has not been
able to regenerate automatically and that you
must perform a cleaning cycle, as indicated
below.
Accumulation of soot in the diesel engine
particulate filter*
If the control lamp lights up you should
help the filter clean itself by driving in the ap-
propriate manner.
To do this, drive about 15 minutes in fourth
or fifth gear (automatic gearbox: S gear
range) at a minimum speed of 60 km/h
(37 mph), with the engine running at approxi-
mately 2,000 rpm. In this way, the soot build
up in the filter is burned. When cleaning is
successful, the control lamp turns off.
If the lamp does not turn off, or the three
lamps turn on (particulate filter , fault in
the emission control system and glow
plugs ), drive the vehicle to a specialised
workshop and have the fault repaired at the
earliest opportunity. WARNING
Always drive according to the road weather
conditions, the t err
ain and traffic. Driving rec-
ommendations should never lead to illegal
manoeuvres in surrounding traffic. 170