Overview of systems
......................138
Problems with cooling with air
dehumidification
............................ 143
Problem with the rear window
defroster ........................................ 147
Rear control panel .........................141
Setting the air distribution .............145
Setting the airflow ......................... 145
Setting the air vents ......................148
Setting the climate mode ............... 144
Setting the temperature ................ 144
Switching air-recirculation mode
on/off ............................................ 147
Switching on/off ........................... 142
Switching residual heat on/off ...... 147
Switching the rear window
defroster on/off ............................ 147
Switching the ZONE function on/
off .................................................. 145
Coat hooks ......................................... 298
Cockpit Overview .......................................... 30
see Instrument cluster
Collapsible spare wheel
Inflating ......................................... 400
see Emergency spare wheel
COMAND
see separate operating instructions
COMAND display
Cleaning ......................................... 338
Combination switch ..........................124
Combined cargo cover and net ........297
Compass Calibrating ..................................... 324
Calling up ....................................... 323
Setting ........................................... 324
Consumption statistics (on-board
computer) .......................................... 231
Convenience box ............................... 299
Convenience closing feature ..............94
Convenience opening feature ............94
Coolant (engine) Checking the level ......................... 331
Display message ............................ 258
Filling capacity ............................... 413
Important safety notes .................. 412
Temperature (on-board computer) . 242 Temperature gauge ........................ 227
Warning lamp .................................
283
Cooling
see Climate control
Cornering light function
Display message ............................ 254
Function/notes ............................. 126
Crash-responsive emergency
lighting ............................................... 129
Cruise control Activation conditions .....................184
Cruise control lever .......................184
Deactivating ................................... 185
Display message ............................ 267
Driving system ............................... 183
Function/notes ............................. 183
Important safety notes .................. 183
Setting a speed .............................. 185
Storing and maintaining current
speed ............................................. 184
Cup holder
Center console .............................. 305
Important safety notes .................. 305
Rear compartment ......................... 305
Customer Assistance Center (CAC) ...25
Customer Relations Department .......25 D
Dashboard see Instrument cluster
Dashboard lighting
see Instrument cluster lighting
Data
see Technical data
Daytime running lamps
Display message ............................ 256
Function/notes ............................. 121
Switching on/off (on-board
computer) ...................................... 239
Dealerships
see Qualified specialist workshop
DEF
Adding ........................................... 173
Display message ............................ 261
Filling capacity ............................... 410
Notes ............................................. 410 Index
7
Trip odometer
Calling up ....................................... 230
Resetting (on-board computer) ...... 232
Trunk
Emergency release .......................... 91
Locking separately ...........................91
Trunk lid
Display message ............................ 272
Opening dimensions ...................... 414
Trunk load (maximum) ...................... 414
Turn signals Changing bulbs (front) ................... 132
Display message ............................ 254
Switching on/off ........................... 124
Type identification plate
see Vehicle identification plate U
Unlocking Emergency unlocking .......................86
From inside the vehicle (central
unlocking button) ............................. 85V
Vanity mirror (in the sun visor) ........
306
Vehicle Data acquisition ............................... 26
Display message ............................ 271
Equipment ....................................... 22
Individual settings ..........................238
Limited Warranty ............................. 26
Loading .......................................... 373
Locking (in an emergency) ............... 86
Locking (SmartKey) .......................... 79
Lowering ........................................ 389
Maintenance .................................... 23
Parking for a long period ................ 177
Pulling away ................................... 156
Raising ........................................... 386
Reporting problems .........................25
Securing from rolling away ............386
Towing away .................................. 354
Transporting .................................. 356
Unlocking (in an emergency) ........... 86
Unlocking (SmartKey) ......................79
Vehicle data ................................... 414Vehicle data .......................................
414
Vehicle dimensions ...........................414
Vehicle emergency locking ................86
Vehicle identification number see VIN
Vehicle identification plate ..............405
Vehicle level AIRMATIC ...................................... 199
Vehicle level (display message) .......261
Vehicle tool kit .................................. 342
Video Operating the DVD ......................... 234
VIN ...................................................... 405 W
Warning and indicator lamps ABS
................................................ 278
Brakes ........................................... 277
Check Engine ................................. 282
Coolant .......................................... 283
Distance warning ........................... 285
DISTRONIC PLUS ........................... 285
ESP ®
.............................................. 279
ESP ®
OFF ....................................... 279
Fuel tank ........................................ 282
Overview .................................. 32, 275
PASSENGER AIR BAG OFF
indicator lamp .................................. 48
Reserve fuel ................................... 282
Seat belt ........................................ 276
SPORT handling mode ................... 280
SRS ................................................ 281
Tire pressure monitor .................... 286
Warranty ............................................ 405
Washer fluid Display message ............................ 273
Wheel bolt tightening torque ...........389
Wheel chock ...................................... 386
Wheels Changing a wheel .......................... 384
Checking ........................................ 363
Cleaning ......................................... 336
Cleaning (warning) .........................385
Emergency spare wheel ................. 398
Important safety notes .................. 362
Interchanging/changing ................384
Mounting a new wheel ................... 38820
Index
Activating/deactivating cooling with
air dehumidification
Points to observe before use G
WARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions
are warm. The windows can fog up
more quickly. This may prevent you from
observing the traffic conditions, thereby
causing an accident.
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a
malfunction.
i The cooling with air dehumidification
function uses refrigerant R134a. This
coolant does not contain
chlorofluorocarbons, and therefore does
not damage the ozone layer.
Activating/deactivating X
To activate: press the ¿ button.
The indicator lamp above the ¿ button
lights up.
X To deactivate: press the ¿ button.
The indicator lamp above the ¿ button
goes out. The cooling with air
dehumidification function has a delayed
switch-off feature. Problems with the cooling with air
dehumidification function When you press the
¿ button, the
indicator lamp in the button flashes three
times
or remains off. You can no longer switch
on the cooling with air dehumidification
function.
X Visit a qualified specialist workshop. Setting climate control to automatic
G
WARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions
are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature of the dispensed air, the airflow
and the air distribution.
Automatic mode will achieve optimal
operation if cooling with air dehumidification
is also activated. If desired, cooling with air
dehumidification can be deactivated.
X Turn the SmartKey to position 2 in the
ignition lock.
X Set the desired temperature.
X To activate: press the à button.
The indicator lamp above the à button
lights up. Automatic air distribution and
airflow are activated.
i 3-zone automatic climate control: when
automatic mode is activated, you can
select a climate mode setting
(Y page 144).
X To deactivate: press the air distribution
button.
Dual-zone
automatic climate control: press
button F(Y page 139). Operating the climate control systems
143
Climate control Z
Problems with the engine
Problem Possible causes/consequences and
M SolutionsThe engine does not
start.
The starter motor
can be heard. R
There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.
X Before attempting to start the engine again, turn the SmartKey
in
the ignition back to position 0 or press the Start/Stop button
repeatedly until all indicator lamps in the instrument cluster go
out.
X Try to start the engine again (Y page 155). Avoid excessively
long
and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak
or discharged.
X
Jump-start the vehicle (Y page 352).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop. The starter motor was exposed to a thermal load that was too high.
X
Allow the starter motor to cool down for approximately two
minutes.
X Try to start the engine again.
If the engine still does not start:
X Consult a qualified specialist workshop. Vehicles with a
gasoline engine:
The engine is not
running smoothly and
is misfiring. There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
X
Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at a qualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic
converter and damage it. The coolant
temperature gauge
shows a value above
248 ‡
(120 †). The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 331). Observe the warning
notes as you do so and add coolant if necessary.160
Driving
Driving and parking
Steam from an overheated engine can cause
serious
burns which can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of the
vehicle and do not stand near the vehicle until
the engine has cooled down.
! A display message is shown if the coolant
temperature is too high.
If the coolant temperature is over
248 ‡(120 †), do not continue driving. The
engine will otherwise be damaged.
The coolant temperature gauge is in the
instrument cluster on the right-hand side
(Y page 31).
Under normal operating conditions and with
the specified coolant level, the coolant
temperature may rise to 248 ‡ (120 †). Tachometer
! Do not drive in the overrevving range, as
this could damage the engine.
The
red band in the tachometer indicates the
engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached. Outside temperature display
G
WARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Indicated temperatures just above the
freezing
point do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
The outside temperature display is in the
multifunction display ( Y page 230).
Changes in the outside temperature are
displayed after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated ( Y page 183):
The segments light up from the stored
speed to the maximum speed.
R DISTRONIC PLUS activated (Y page 185):
One or two segments in the set speed
range light up.
R DISTRONIC
PLUS detects a vehicle in front:
The segments between the speed of the
vehicle in front and the stored speed light
up. Operating the on-board computer
Overview :
Multifunction display
; Right control panel
= Switches on the Voice Control System;
see the separate operating instructions
? Back button
A Left control panel
X To activate the on-board computer:
turn
the SmartKey to position 1 in the ignition
lock. 228
Displays and operation
On-board computer and displays
Engine
Display messages Possible causes/consequences and
M Solutions+
Check Coolant
Level See
Operator's Manual The coolant level is too low.
!
Avoid
making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so
(Y page 331).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist
workshop. ? The fan motor is faulty.
X
At coolant temperatures under 248 ‡(120 †),
drive to the next
qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic. ?
Coolant Too Hot
Stop Vehicle Turn
Engine Off The coolant is too hot.
A warning tone also sounds.
G WARNING
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 175).
X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the display message goes out
and the coolant temperature is under 248 ‡ (120
†).
Otherwise, the engine could be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to
248 ‡ (120 †).258
Display messages
On-board computer and displays
Problem Possible causes/consequences and
M Solutions?
The red coolant
warning
lamp comes on
while the engine is
running. The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator
may be blocked or the electric engine radiator fan may be
malfunctioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 175).
X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant, observing the warning
notes ( Y page 331).
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the coolant temperature is
under
248 ‡ (120 †). Otherwise, the engine could be damaged.
X Drive to the nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic. ?
The red coolant
warning
lamp comes on
while the engine is
running. A warning tone
also sounds. The coolant temperature has exceeded 248 ‡ (120 †). The
airflow
to the engine radiator may be blocked or the coolant level
may be too low.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Do
not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
X Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 175).284
Indicator and warning lamps in the instrument cluster
On-board computer and displays
Problem Possible causes/consequences and
M SolutionsX
Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant, observing the warning
notes ( Y page 331).
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X At coolant temperatures under 248 ‡ (120 †), drive to the next
qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic. Driving systems
Problem Possible causes/consequences and
M Solutions·
The red distance
warning lamp lights up
while the vehicle is in
motion.
A warning tone
also sounds. You are approaching a vehicle or a stationary obstacle in your line
of travel at too high a speed.
X
Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
Further information on DISTRONIC PLUS ( Y page 185).
Further information on PRE-SAFE ®
Brake (Y page 72). Indicator and warning lamps in the instrument cluster
285
On-board computer and displays Z