i
Switch the heater booster function on or
off with the 006Abutton (Y page 130).
X To activate the auxiliary heating sys-
tem: press and hold the upper section of
the 0084 switch for longer than 2 seconds.
The red indicator lamp in the button lights
up. The auxiliary heating heats or ventilates the interior to the temperature that you
have set. The blower switches to the first
level.
X To switch off auxiliary heating: press the
upper section of the 0084button.
or
X Turn the key in the ignition lock to posi-
tion 0.
The red indicator lamp in the button goes
out. The auxiliary heating operates for
another 2 minutes and then switches off
automatically. Selecting a switch-on time
Important information You can use the on-board computer to define
up to three switch-on times, one of which canbe selected.
The yellow indicator lamp in the 0084button
goes out after 30 minutes, if you:
R have selected the switch-on time and
R turn the key to position 0in the ignition lock
On-board computer without steering
wheel buttons X
Turn the key to position 2in the ignition
lock.
X Press the 0084button.
The 0084 symbol flashes in the display.
or
X Press the 0079menu button on the instru-
ment cluster repeatedly until the 0084
symbol flashes in the display.
X Use the 0074or0075 buttons on the instrument
cluster to select the switch-on time 1 1to 3
3. The switch-on time selected is displayed.
X Wait 10 seconds for the standard display to
appear.
The switch-on time is selected. The yellow
indicator lamp in the 0084button lights up.
If you do not preselect a switch-on time,
and --:-- --:-- is shown in the display, this
means that the automatic switch-on mode
is switched off. The yellow indicator lamp in the 0084 button goes out.
On-board computer with steering wheel
buttons X
Turn the key to position 2in the ignition
lock.
X Press the 0084button.
The Aux. heat Aux. heat submenu is shown in the
display.
If no switch-on time has been selected, the
selected switch-on time is highlighted or
Timer off Timer off is highlighted.
i You can also access the
Aux.
Aux.heat.
heat. sub-
menu via the Settings
Settings(Ypage 188)
menu.
X Use the 0081or0082 button on the steer-
ing wheel to select the desired switch-on
time.
Use the Timer off Timer off setting to deactivate
automatic switch-on.
X Press the 0080button on the steering
wheel.
The switch-on time is selected. The yellow
indicator lamp in the 0084button lights up. 124
Operating the auxiliary heating systemClimate control
Setting the switch-on time
X Use the same method to select a switch-on
time as described in the "Preselecting a
switch-on time" section.
On-board computer without steering
wheel buttons
X Press the 0045reset button on the instru-
ment cluster.
The hour display flashes.
X Use the 0074and 0075buttons on the instru-
ment cluster to set the hours.
X Press the 0045reset button
The minute display flashes.
X Use the 0074and 0075buttons to set the
minutes.
The switch-on time is set and selected.
On-board computer with steering wheel
buttons
X Press the 0063button on the steering
wheel.
The display shows the Hours
Hours menu.
X Use the 0081and0082 buttons on the
steering wheel to set the hours.
X Press the 0063button.
The display shows the Minutes
Minutes menu.
X Use the 0081and0082 buttons to set the
minutes.
X Press the 0080button.
The switch-on time is set and selected. Operation with the remote control
Important information You can switch the auxiliary heating on/off
and set the operating duration using the
remote control. You can use up to 4 remote
control units on the vehicle. These must be
synchronized for the receiver in your vehicle
(Y page 126). The remote control has a maximum range of
approximately 600 meters. This range is
reduced by:
R sources of interference
R solid objects between the remote control
and the vehicle
R the remote control being in an unfavorable
position in relation to the vehicle
R transmitting from an enclosed space
Overview of the remote control 0043
Indicator lamp
0044 To confirm settings
0087 To switch the remote control on/off, set
the operating duration or end or cancel
settings
Indicator lamp 0043lights up in various ways to
show different operating modes: Signaling Meaning
Lights up red Remote control switched
on
Data transfer
Flashes red Auxiliary heating switched
off
Lights up
green Auxiliary heating switched
onOperating the auxiliary heating system
125Climate control Z
X
Using the 00CFand00DB buttons, set the
desired heating level to a range between 10 and 30.
X Press the 0070button.
The heating level is set and the 0084sym-
bol appears. Switching the heater booster function
on/off Vehicles with auxiliary heating
Vehicles with heater booster function
At outside temperatures of up to 39 ‡ (4 †)
the fuel-fired heater booster system heats the vehicle interior as quickly as possible when
the engine is running.
The auxiliary heating automatically switches
to heater booster mode after the engine is
started.
At an outside temperature above 39 ‡ (4 †)
the auxiliary heating system and the heater
booster function switch off automatically.
If you switch off the engine without switching off the heater booster function, the system will be switched on the next time the engine is
started (memory function).
i Switch the auxiliary heating on or off with
the 0084 button (Y page 123).
X To switch on/off: press the006Aswitch.
If the indicator lamp in the button lights up,
the heater booster function is switched on.
After switching off, the auxiliary heating oper-
ates for about another 2 minutes and then
switches off automatically. Replacing the remote control battery
G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately. H
Environmental note Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately
and recycled to protect the
environment. Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
If the indicator lamp on the remote control
flashes red rapidly, the remote control battery
is discharged. You should replace the remote
control battery.
You need a battery of the type CR2430, which can be obtained at any qualified specialist
workshop. 130
Operating the auxiliary heating systemClimate control
Wear suitable footwear to ensure correct
usage of the pedals.
X Secure the load as per the loading guide-
lines (Y page 240).
X Make sure that the floormats and carpets
are properly secured so that they cannot
slip and obstruct the pedals.
X Close all doors. Starting the engine
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
! Do not depress the accelerator pedal
when starting the engine.
X Before starting the engine, make sure that:
R all the doors are closed.
R all the vehicle occupants are wearing
their seat belts correctly.
R the parking brake is applied.
i If you depress the brake pedal before
starting the engine, the pedal travel is short
and pedal resistance is high.
If you depress the brake pedal again after
starting the engine, pedal travel and resist-
ance will be back to normal again. Gearshift pattern
005D
Park position with parking lock
005E Reverse gear
005C Neutral
005B Drive
X Move the selector lever to position P.
The display in the instrument cluster shows
P:
R on vehicles with steering wheel buttons
(Y page 187)
R on vehicles without steering wheel but-
tons (Y page 182)
i You can also start the engine in neutral
N.
X Turn the key to position 2in the ignition
lock.
The 0028 preglow indicator lamp in the
instrument cluster lights up briefly.
X Once the 0028preglow indicator lamp goes
out, turn the key to position 3in the ignition
lock and release it as soon as the engine is running.
i You can start the engine without preglow
when the engine is warm.
The preglow system is malfunctioning if the
0028 preglow indicator lamp lights up for
approximately 1 minute:
R after the ignition is switched on
R while the engine is running
At extremely low outside temperatures you
may then no longer be able to start the
engine. Have the malfunction rectified at a qualified specialist workshop. Driving
139Driving and parking Z
Problems with the engine
Problem
Possible causes/consequences and
0050
0050Solutions The engine does not
start.
The starter motor can
be heard. There is air in the fuel system.
X Turn the key back to position 0in the ignition lock before
attempting to start the engine again.
X Start the engine again.
Please bear in mind that lengthy and frequent starting attempts
will drain the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. The engine does not
start.
The starter motor can
be heard. The reserve
fuel warning lamp is lit
and the fuel gage is at
0. The fuel tank has been run dry.
X Refuel the vehicle.
If you drive until the fuel tank is completely empty, air may get into
the fuel system. If the engine does not start after refueling, bleed the fuel system as follows:
X Turn the key to position 2in the ignition for approximately
10 seconds.
X Start the engine continuously for a maximum of 60 seconds.
If the engine does not start:
X Wait approximately 2 minutes.
X Restart the engine continuously for a maximum of 60 seconds.
X If the engine still fails start, do not continue trying to start it.
X Consult a qualified specialist workshop. The vehicle cannot be
driven at a speed
exceeding 5 mph
(8 km/h).
The yellow
00B9engine
diagnostic lamp and
the yellow 00E2DEF
indicator lamp 2
light
up. The exhaust gas aftertreatment is faulty, an emission-relevant
malfunction has occurred or the DEF reserve has been used up.
This malfunction or defect can damage the exhaust gas after-
treatment.
X Observe the messages in the display:
R on vehicles without steering-wheel buttons (Y page 200)
R on vehicles with steering-wheel buttons (Y page 211) and
(Y page 211). The engine does not
start.
The starter motor can-
not be heard. The battery isolating switch is switched off.
X Switch on the power supply (Y page 137).2
Only vehicles without steering-wheel buttons. Driving
141Driving and parking Z
Problem
Possible causes/consequences and
0050
0050Solutions The engine does not
start.
The starter motor can-
not be heard. The on-board voltage is too low. The battery is too weak or dis-
charged.
X Jump-start the vehicle (Y page 276).
If the engine cannot be jump-started, the starter motor is faulty.
X Consult a qualified specialist workshop. The engine does not
start.
The starter motor can-
not be heard. The battery is discharged or faulty.
X Check the battery for damage.
X Charge the battery (Y page 263).Automatic transmission
Important safety notes
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do not simultaneously accelerate.
! Vehicles with automatic transmission
may roll only briefly in the neutral position
N. Prolonged rolling of the wheels, e.g.
when being towed, will result in transmis-
sion damage.
i Be sure to observe the instructions in the
"Tow-starting and towing away" section
(Y page 277). Selector lever
005D
Park position with parking lock
005E Reverse gear
005C Neutral
005B Drive
The display in the instrument cluster shows
the present selector lever position or the cur-
rent shift range:
R on vehicles with steering wheel buttons
(Y page 187)
R on vehicles without steering wheel buttons
(Y page 182) 142
Automatic transmissionDriving and parking
Problems with cruise control
Problem
Possible causes/consequences and
0050
0050Solutions On vehicles with steer-
ing wheel buttons, the
speed cannot be set
when cruise control is
activated. The display shows a high-priority message. Thus a change in speed
is not possible.
X Proceed as instructed by the message in the display.
X Deactivate cruise control COLLISION PREVENTION ASSIST
General notes COLLISION PREVENTION ASSIST comprises
the distance warning function and adaptive
Brake Assist.
Distance warning function Important safety notes
i Note the section on 'Important safety
notes' (Y page 57). G
WARNING
The distance warning function does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R when cornering
Thus, the distance warning function cannot
provide a warning in all critical situations.
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake. G
WARNING
The distance warning function cannot always
clearly identify objects and complex traffic
situations.
In such cases, the distance warning function
may:
R give an unnecessary warning
R not give a warning
There is a risk of an accident. Always pay careful attention to the traffic sit-
uation and do not rely solely on the distance
warning function.
Operation
The distance warning function can help you to
minimize the risk of a front-end collision with
a vehicle ahead or reduce the effects of such a collision. If the distance warning function
detects that there is a risk of a collision, you
will be warned visually and acoustically. With-out your intervention, the distance warning
function cannot prevent a collision.
The distance warning function will issue a
warning at speeds of around 20 mph
(30 km/h) or more if:
R you approach a vehicle ahead of you very
quickly. You will then hear an intermittent
warning tone and the 00C7warning lamp in
the instrument cluster flashes.
X Brake immediately in order to increase the
distance from the vehicle in front.
or
X Take evasive action provided it is safe to do
so.
If you want the distance warning function to
assist you, the function must be activated and operational.
Due to the nature of the system, particularly
complicated driving conditions may cause thesystem to display an unnecessary warning.
With the help of the radar sensor system, the
distance warning function can detect obsta-
cles that are in the path of your vehicle for an
extended period of time. Driving systems
161Driving and parking Z
Up to a speed of about 45 mph (70 km/h), the
distance warning function can also react to
stationary obstacles, such as stopped or
parked vehicles.
If you approach an obstacle and the distance
warning function detects a risk of a collision,
the system will alert you both visually and
acoustically.
In particular, the detection of obstacles can
be impaired in the case of:
R there is dirt on the sensors or anything else
covering the sensors
R it is snowing or raining heavily
R there is interference from other radar sour-
ces
R there are strong radar reflections, for
example in parking garages
R a narrow vehicle traveling in front, e.g. a
motorbike
R a vehicle traveling in front on a different line
Following damage to the front end of the vehi-
cle, have the configuration and operation of
the radar sensor checked at a qualified spe-
cialist workshop. This also applies to colli-
sions at slow speeds where there is no visible
damage to the front of the vehicle.
Activating/deactivating the distance
warning function
When you switch on the engine, the distance
warning function switches on after a few sec-
onds.
X To deactivate: press the00D4button
(Y page 37).
Vehicles without steering wheel but-
tons: the00C7 warning lamp in the instru-
ment cluster lights up and the OFF
OFF message
flashes.
Vehicles with steering wheel buttons:
the 00C7 warning lamp in the instrument cluster lights up and the
Distance Warn‐ Distance Warn‐
ing Deactivated
ing Deactivated message appears.
X To activate: press the00D4button again
(Y page 37).
Vehicles without steering wheel but-
tons: the00C7 warning lamp in the instru-
ment cluster goes out and the ON
ON message
flashes.
Vehicles with steering wheel buttons:
the 00C7 warning lamp in the instrument
cluster goes out and the Distance Warn‐ Distance Warn‐
ing Activated
ing Activated message appears in the
multifunction display.
Adaptive Brake Assist i
Observe the "Important safety notes" sec-
tion for driving safety systems (Y page 57). G
WARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
R intervene unnecessarily
R not intervene
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in a non-critical driving situation. G
WARNING
Adaptive Brake Assist does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R to stationary obstacles
R when cornering
As a result, the Adaptive Brake Assist may not intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. 162
Driving systemsDriving and parking