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Driving sys
tems 142
X
Press the èor· button to select the
Telephone menu.
X Press the jork button to call up
the phone book.
X Press the jork button to select the
desired name. To scroll through the tele-
phone book faster, press and hold the
j ork button for longer than 1 sec-
ond.
X Press the sbutton to start dialling.
The multi-function display shows the Con-
necting call...message.
The number dialled is stored in the redial
memory.
When there is a connection, the name of
the person called – if stored in the phone
book – or the number dialled appears in the
multi-function display.
or
X If you do not wish to make a call, press the
t button.
Redialling The on-board computer stores the last phone
numbers which were dialled. X
Press the èor· button to select the
Telephone menu.
X Press the sbutton to call up the most
recently dialled number in the redial mem-
ory.
X Press the jork button to select the
desired name or number.
X Press the sbutton to start dialling. Driving systems
Overview of driving systems
The vehicle's driving systems are described
on the following pages:
R Cruise control, Distronic* and Speedtronic,
which are used to control the speed of the
vehicle
R HOLD, which makes pulling away easier,
particularly on steep uphill gradients
R Vehicle level setting and AIRMATIC DC*,
which are used to adjust the vehicle's sus-
pension system
R 4*MATIC (permanent four-wheel drive), for
optimum traction
R Parktronic*, which assists you in parking
and manoeuvring
The ABS, BAS, adaptive brake lights, ESP ®
,
EBV (electronic brake-power distribution) and
ADAPTIVE BRAKE driving safety systems are
described in the "Driving safety systems" sec-
tion (Y page 58). Controls
* optional
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Page 146 of 401

Driving sys
tems 143Cruise control
Cruise control maintains a constant road
speed for you. It brakes automatically in order
to avoid exceeding the set speed. On long and
steep downhill gradients, especially if the
vehicle is laden or towing a trailer, you must
shift to a lower gear in good time or select
shift range 1,2or 3in vehicles with automatic
transmission*. By doing so you will make use
of the braking effect of the engine, which
relieves the load on the brake system and
prevents the brakes from overheating and
wearing too quickly. G
Risk of accident
Do not change down for additional engine
braking on a slippery road surface. This
could cause the drive wheels to lose their
grip and the vehicle could skid.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a
steady speed for a prolonged period. You can
store any road speed above 30 km/h. G
Risk of accident
Cruise control cannot take account of road
and traffic conditions.
Always pay attention to traffic conditions
even when cruise control is activated. Cruise control is only an aid designed to
assist driving. You are responsible for the
vehicle's speed and for braking in good
time. G
Risk of accident
Do not use cruise control:
R in road and traffic conditions which do
not allow you to maintain a constant
speed (e.g. heavy traffic or winding
roads). You could otherwise cause an
accident.
R on slippery roads. Braking or accelerat-
ing could cause the drive wheels to lose
traction and the vehicle could then skid.
R when there is poor visibility, e.g. due to
fog, heavy rain or snow
Cruise control display in the speedom-
eter When cruise control is activated, the seg-
ments from the set speed to the maximum
speed light up in the multi-function display. 1
Segments
Cruise control lever You can operate cruise control and variable
Speedtronic with the cruise control lever.
The LIM indicator lamp on the cruise control
lever indicates which system you have selec-
ted:
R
LIM indicator lamp off:
cruise control is selected
R LIM indicator lamp lit:
variable Speedtronic is selected Controls
* optional
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Driving sys
tems 1441
To store the current speed or a higher
speed
2 LIM indicator lamp
3 To select the current or last stored speed
4 To store the current speed or a lower
speed
5 To switch between cruise control and var-
iable Speedtronic
6 Deactivating cruise control
Selecting cruise control X
Check whether LIM indicator lamp 2is off.
If it is off, cruise control is already selected.
If it is not, press the cruise control lever in
the direction of arrow 5.
LIM indicator lamp 2in the cruise control
lever goes out. Cruise control is selected. Storing and maintaining the current
speed You can store the current speed if you are
driving faster than 30 km/h and ESP ®
is acti-
vated (Y page 60).
X Accelerate the vehicle to the desired
speed.
X Briefly press the cruise control lever up
1 or down 4.
X Remove your foot from the accelerator
pedal.
Cruise control is activated. The vehicle
automatically maintains the stored speed.
i Cruise control may be unable to maintain
the stored speed on uphill gradients. The
stored speed is resumed when the gradient
evens out. Cruise control maintains the
stored speed on downhill gradients by
automatically applying the brakes.
Vehicles with manual transmission:
R Always drive at adequate, but not exces-
sive, engine speeds.
R Change gear in good time.
R If possible, do not change down several
gears at a time. Selecting the current or last stored
speed G
Risk of accident
Only select a stored speed if you know what
that speed is and whether it is suitable for
the current situation. Otherwise, sudden
acceleration or braking could endanger you
or others.
X Briefly pull the cruise control lever towards
you 3.
X Remove your foot from the accelerator
pedal.
The first time cruise control is activated it
stores the current speed or regulates the
speed of the vehicle to the previously
stored speed.
Setting a speed X
Press the cruise control lever up 1for a
higher speed or down 4for a lower speed.
X Keep the cruise control lever pressed until
the desired speed is reached.
X Release the cruise control lever.
The new speed is stored. Controls
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Page 148 of 401

Driving sys
tems 145
i
Cruise control is not deactivated if you
depress the accelerator pedal. For exam-
ple, if you accelerate briefly to overtake,
cruise control adjusts the vehicle's speed
to the last speed stored after you have fin-
ished overtaking.
i Deceleration of the vehicle by means of
the cruise control lever is assisted by auto-
matic application of the brakes.
Vehicles with automatic transmission*:
On long downhill gradients, the automatic
transmission shifts down as a further meas-
ure.
Making fine adjustments in 1 km/h
increments X
Briefly press the cruise control lever up
1 for a higher speed or down 4for a
lower speed.
The last speed stored is increased or
reduced.
Deactivating cruise control There are several ways to deactivate cruise
control: X
Briefly press the cruise control lever for-
wards 6.
or
X Brake.
or
X Briefly press the cruise control lever in the
direction of arrow 5.
Variable Speedtronic is selected. LIM indi-
cator lamp 2in the cruise control lever
lights up.
Cruise control is automatically deactivated if,
for example:
R you depress the parking brake
R you are driving at less than 30 km/h
R ESP ®
is intervening or you deactivate
ESP ®
R you move the selector lever to Nin vehicles
with automatic transmission* while driving
If cruise control is deactivated, you will hear
a warning tone. You will see the Cruise con-
trol off message in the multi-function dis-
play for approximately five seconds.
i The last speed stored is cleared when you
switch off the engine. Distronic*
Distronic regulates the speed and automati-
cally maintains the distance to the vehicle in
front. It brakes automatically in order to avoid
exceeding the set speed. On long and steep
downhill gradients, especially if the vehicle is
laden or towing a trailer, you must select shift
range 1,2or 3. By doing so,you will make use
of the braking effect of the engine, which
relieves the load on the brake system and
prevents the brakes from overheating and
wearing too quickly. G
Risk of accident
Do not change down for additional engine
braking on a slippery road surface. This
could cause the drive wheels to lose their
grip and the vehicle could skid. G
Risk of accident
Distronic is only an aid designed to assist
driving. The driver remains fully responsible
for the vehicle's distance from other vehi-
cles, the vehicle's speed and braking in
good time. Controls
* optional
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Page 149 of 401

Driving sys
tems 146 Distronic does not react to:
R
pedestrians
R stationary obstacles on the road, e.g. sta-
tionary or parked vehicles
R oncoming and crossing traffic
Distronic may not detect narrow vehicles
driving in front, e.g. motorcycles, or vehi-
cles driving on a different line. Therefore,
always pay attention to traffic conditions
even when Distronic is activated. Other-
wise, you may fail to recognise dangers in
time, could cause an accident and injure
yourself and others.
If a slower-moving vehicle is detected in front,
Distronic causes your vehicle to brake and
maintain a preset distance to the vehicle in
front. G
Risk of accident
Distronic cannot take account of road and
traffic conditions. Deactivate, or do not
activate, Distronic if it does not detect the
vehicle in front, or if it no longer detects it.
This is especially the case:
R before corners
R on filter lanes R
when changing to a lane with faster mov-
ing traffic
R in complex driving situations or where
the lanes are diverted, e.g. at motorway/
roadway construction sites
Otherwise, Distronic maintains the current
speed or accelerates to the set speed.
Distronic cannot take account of weather
conditions. Deactivate, or do not activate,
Distronic:
R if the roads are slippery, snow-covered or
icy. The wheels could lose their grip
under braking or acceleration. The vehi-
cle could start to skid.
R if the sensors are dirty or there is poor
visibility, e.g. due to snow, rain or fog.
Distance control may be impaired.
Always pay attention to traffic conditions
even when Distronic is activated. Other-
wise, you may fail to recognise dangers in
time, could cause an accident and injure
yourself and others.
If there is no vehicle in front, Distronic oper-
ates in the same way as cruise control. Dis-
tronic functions in the 30 km/h to
180 km/h range. G
Risk of accident
Distronic brakes your vehicle at a maximum
of 2 m/s 2
, depending on its speed. This
corresponds to approximately 20% of your
vehicle's maximum braking power. You
must also apply the brakes yourself if this
braking power is not sufficient.
If Distronic detects a risk of collision with a
vehicle in front, an intermittent warning
tone sounds. In addition, the ldistance
warning lamp in the instrument cluster
lights up. Brake to avoid a collision.
Cruise control lever With the cruise control lever you can operate
Distronic and variable Speedtronic.
The LIM indicator lamp on the cruise control
lever indicates which system you have selec-
ted:
R
LIM indicator lamp off:
Distronic is selected
R LIM indicator lamp lit:
variable Speedtronic is selected Controls
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Driving sys
tems 1471
To store the current speed or a higher
speed
2 LIM indicator lamp
3 To select the current or last stored speed
4 To store the current speed or a lower
speed
5 To switch between Distronic and variable
Speedtronic
6 To deactivate Distronic
Selecting Distronic X
Check whether LIM indicator lamp 2is off.
If it is off, Distronic is already selected.
If it is not, press the cruise control lever in
the direction of arrow 5.
LIM indicator lamp 2in the cruise control
lever goes out. Distronic is selected. Switching on Distronic, storing the cur-
rent speed and maintaining it If Distronic is not activated after the cruise
control lever is pressed, you will see the mes-
sage - - - in the multi-function display.
You cannot activate Distronic in the following
circumstances:
R if you are driving slower than 30 km/h or
faster than 180 km/h
R when braking
R when you have applied the parking brake
R if ESP ®
is deactivated
R when the selector lever* is in position P,
R or N
R for two minutes after the engine is started
X Accelerate the vehicle to the desired
speed.
X Briefly press the cruise control lever up
1 or down 4.
X Remove your foot from the accelerator
pedal.
Distronic is activated. The vehicle main-
tains the stored speed until the distance to
the vehicle in front becomes too small. i
If you do not fully release the accelerator
pedal, the DISTRONIC override message
appears in the multi-function display. The
distance to a slower-moving vehicle in front
will then not be adjusted. You will be driving
at the speed you determine by the position
of the accelerator pedal.
Setting a speed X
Press the cruise control lever up 1for a
higher speed or down 4for a lower speed.
X Keep the cruise control lever pressed until
the desired speed is reached.
X Release the cruise control lever.
The new speed is stored.
i Deceleration of the vehicle by means of
the cruise control lever is assisted by auto-
matic application of the brakes. On long
downhill gradients, the automatic trans-
mission* shifts down as a further measure. Controls
* optional
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Driving sys
tems 148
Adjustment in 10 km/h increments X
Briefly press the cruise control lever up
1 for a higher speed or down 4for a
lower speed.
The last speed stored is increased or
reduced.
Making fine adjustments in 1 km/h
increments X
For a higher speed: briefly pull the cruise
control lever towards you 3.
or
X Keep the cruise control lever pulled
towards you 3until the desired speed is
reached.
Selecting the current or last stored
speed G
Risk of accident
Only select a stored speed if you know what
that speed is and whether it is suitable for
the current situation. Otherwise, sudden
acceleration or braking could endanger you
or others. X
Briefly pull the cruise control lever towards
you 3.
X Remove your foot from the accelerator
pedal.
Distronic is activated and accepts the cur-
rent speed if it is activated for the first time,
or adjusts the vehicle's speed to the last
speed stored.
Setting the specified minimum distance
for Distronic You can set the specified minimum distance
for Distronic by varying the time span
between one and two seconds. This time span
determines the distance that Distronic should
maintain from the vehicle in front, depending
on the road speed. You can read this distance
in the multi-function display (Y page 149). 1
To activate/deactivate the distance warn-
ing function
2 Indicator lamp
3 To adjust the set distance
Adjusting the set distance
X To increase: turn thumbwheel 3towards
¯.
Distronic then maintains a greater distance
between your vehicle and the vehicle in
front.
X To decrease: turn thumbwheel 3towards
®.
Distronic then maintains a shorter distance
between your vehicle and the vehicle in
front. Controls
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Driving sys
tems 149
i
Make sure that you maintain the mini-
mum distance to the vehicle in front
required by law. Adjust the distance to the
vehicle in front if necessary.
Distance warning function Even if Distronic is deactivated, this function
warns you at speeds above 30 km/h if:
R
the distance to the vehicle in front is too
short for the speed you are driving at for
several seconds. The ldistance warn-
ing lamp in the instrument cluster then
lights up.
R you are approaching a vehicle in front at too
great a speed. You then hear an intermit-
tent warning tone, and the ldistance
warning lamp in the instrument cluster
lights up.
You must apply the brakes yourself in order
to maintain the correct distance to the vehicle
and to avoid a collision. G
Risk of accident
Be especially observant of traffic condi-
tions when the ldistance warning lamp
in the instrument cluster lights up or an
intermittent warning tone sounds. Brake or take evasive action as necessary.
i Distronic does not always clearly recog-
nise complex road and traffic conditions.
You may then receive a false distance warn-
ing tone or none at all.
X To activate/deactivate: press button1.
When the function is activated, indicator
lamp 2in the button lights up and a loud-
speaker symbol appears in the display.
When the function is deactivated, indicator
lamp 2in the button goes out and the
loudspeaker symbol disappears from the
multi-function display.
Distronic displays in the speedometer 1
Stored speed When Distronic is activated, one or two seg-
ments in the set speed range light up.
i For design reasons, the speed displayed
in the speedometer may differ slightly from
the speed set for Distronic. 1
Segments
If Distronic detects a vehicle in front, the seg-
ments between the speed of the vehicle in
front and the stored speed light up.
Distronic menu in the on-board com-
puter You can read the current Distronic settings in
the Distronic menu. The reading in the multi-
function display depends on whether Dis-
tronic and the distance warning function are
activated or deactivated. Controls
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