Trip computer (on-board com-
puter).................................................. 171
Trip meter
see Trip odometer
Trip odometer
Display (vehicles with steering
wheel buttons) ............................... 164
Display (vehicles without steering
wheel buttons) ............................... 160
Resetting ....................................... 159
see Trip computer (on-board computer)
Turn signals
Replacing bulbs (front) ..................... 89
Replacing bulbs (rear) ...................... 90
Switching on/off .............................. 82
Turn signals (Chassis Cab)
Replacing bulbs (rear) ...................... 91
Twin front-passenger seat
Stowage compartment .................. 202
Two-way radios
Type approval/frequency .............. 271
TWR (Tongue Weight Rating) (defi-
nition) ................................................. 261
U
Unlocking
From inside the vehicle (central
unlocking button) ............................. 63
USB port ............................................. 207
V
Vehicle
Data acquisition ............................... 30
Display message ............................ 189
Electronics ..................................... 271
Equipment ....................................... 23
Individual settings (vehicles with
steering wheel buttons) ................. 165
Limited Warranty ............................. 23
Loading .......................................... 254
Locking (SmartKey) .......................... 59
Lowering ........................................ 267
Maintenance .................................... 24
Operating safety .............................. 26
Parking for a long period ................ 129
Pulling away ................................... 119 Raising ........................................... 263
Registration ..................................... 28
Reporting problems ......................... 28
Securing from rolling away ............ 127
Towing away .................................. 239
Transporting .................................. 242
Unlocking (SmartKey) ...................... 59
Vehicle battery
see Battery (vehicle)
Vehicle bodies ..................................... 28
Body/equipment mounting direc-
tives for trucks ................................. 28
Vehicle data ....................................... 281
Vehicle identification number .......... 272
Vehicle identification plate .............. 272
Vehicle tool kit .................................. 236
Voltage supply
Fuses ............................................. 242
W
WarningStickers ........................................... 25
Warning and indicator lamp
Power assistance for the steering .. 199
Warning and indicator lamps
Brakes ........................................... 192
Check Engine ................................. 196
Coolant .......................................... 195
Diesel Exhaust Fluid (DEF) ............. 193
Electrical step ................................ 199
ESP
®.............................................. 190
ESP®function ................................ 194
Overview .......................................... 34
Seat belt ........................................ 198
Warning lamp .................................... 237
Warning triangle ................................ 237
Warning- and indicator lamps
ABS ................................................ 191
Air filter .......................................... 197
ASR ................................................ 190
BAS ................................................ 191
Battery charge ............................... 194
Brake wear .................................... 194
Bulbs .............................................. 198
Doors ............................................. 198
Engine oil level ............................... 195
Preglow .......................................... 197
Index21
Reservefuel .................................. .196
Tire pressure monitor .................... 197
Water separator .............................1 98
Windshield washer fluid ................. 198
Warranty .............................................. 23
Washer fluid
Adding ...........................................2 20
Capacities ...................................... 281
Display message ............................ 189
Indicator lamp ................................ 198
Notes ............................................. 281
Wiping with ...................................... 94
Wheels
Changing a wheel .......................... 262
Checking ........................................ 244
Cleaning ......................................... 231
Important safety notes .................. 243
Installing the adapter (spare
wheel) ............................................ 265
Interchanging/changing ................ 262
Mounting a new wheel ................... 266
Mounting a wheel .......................... 263
Removing a wheel .......................... 265
Removing and mounting the spare
wheel ............................................. 269
Snow chains .................................. 246
Storing ...........................................2 62
Tightening torque ........................... 267
Wheel size/tire size ....................... 268
Window curtain air bag ....................... 46
Windows
see Side windows
Windshield
Cleaning ......................................... 231
Defrosting ...................................... 102
Windshield heating
Problem (malfunction) ................... 103
Switching on/off ........................... 103
Windshield washer fluid
Adding ...........................................2 20
Indicator lamp ................................ 198
Windshield wipers
Problem (malfunction) ..................... 96
Rain and light sensor ....................... 94
Rear window wiper .......................... 95
Replacing the wiper blades .............. 95 Setting the sensiti
vity (vehicles
with steering wheel buttons and
rain/light sensor) ........................... 170
Switching on/off .............................. 94
Wiping with windshield washer
fluid ................................................. 94
Winter diesel ..................................... 274
Winter driving
Slippery road surfaces ................... 134
Snow chains .................................. 246
Winter operation
General notes ................................ 245
Radiator cover ................................. 29
Winter tires
M+S tires ....................................... 245
Setting a limit speed ......................1 31
Wiper blades
Cleaning ......................................... 231
Replacing ......................................... 95
Workshop
see Qualified specialist workshop
22Index
Instrument cluster
Displays and controls
Instrumentcluste ron vehicles without steering whee lbuttons
Instrumen tcluste rin vehicles wit hsteering-wheel buttons
FunctionPag e
:Speedometer159
;Tachometer159
=f, gBrightens/dims th e
instrumen tcluste rlighting15 9
?Fue lgage wit hfuel filler flap
location indicator15 9
ADisplay
Vehicles without steering
whee lbuttons16 0
Vehicles wit hsteering whee l
buttons16 1
FunctionPag e
BReset butto n933
CMen ubutto n4
• changes standard display16 0
•select smenus16 1
DService butto nË
Checks th eengin eoil level21 6
Instrument cluster33
At a glance
FunctionPage
¦Fluid level too low in wind-
shield washer/headlamp
cleaning system
198
åDEF supply low or contami-
nated/diluted159
Exhaust gas aftertreatment
malfunction193
ÄIndicator lamp, distance
warning140
·Warning lamp, distance
warning140
ÃWarning and indicator lamps,
Lane Keeping Assist144
1Door or hood open198
Electrically operated step
malfunction199
#Brake pads/linings worn194
+LOW RANGE active145
KHigh-beam headlamps on
(vehicle with steering wheel
buttons)
82
JRight-hand turn signal82
:ASR malfunction54
BAS malfunction191
hESP®malfunction190
ÈDirt accumulation in air filter197
6Reserve fuel159
Fuel filler cap open196
FunctionPage
:Water in the fuel198
mFuel filter dirty198
#Battery charging malfunction194
bBulb defective198
=Tachometer with warning
and indicator lamps
cParking brake applied133
LLow-beam headlamps on80
KWorking speed governor
(ADR) on151
ÐPower steering assistance
malfunction199
KHigh-beam headlamps on
(vehicle without steering
wheel buttons)
82
åDEF supply low or contami-
nated/diluted159
Exhaust gas aftertreatment
malfunction193
|Reserve fuel196
Fuel filler cap open196
hESP®malfunction190
7Fasten seat belts198
iCorresponding messages may also be
shown in the display (Ypage 173).
Instrument cluster35
At a glance
Steering wheel buttons
FunctionPage
:Display161
On-board computer opera-
tion
;Selects a submenu or adjusts
the volume161
WUp/increases the vol-
ume
X Down/reduces the vol-
ume
Using the telephone172
6 Accepts a call/starts
dialing
~ Ends a call/rejects an
incoming call
=Scrolls from one menu to
another161
V Forwards
UBack
Scrolls within a menu161
9Forwards
:Back
Center console
FunctionPage
:Stowage compartment201
;Audio 10 or Audio 15 (see the
separate operating instruc-
tions)
=Air-conditioning control
panel97
Paper holder1203
?Center console control
panel
cSwitches the left/right-hand
seat heating on/off77
zSwitches the windshield
heating on/off103
|Switches the rear window
defroster on/off103
fActivates/deactivates
PARKTRONIC150
£Switches the hazard warning
lamps on/off83
1Only on vehicles without rear-compartment climate control.
36Center console
At a glance
Crosswind Assist is operational again as soon as
the driving conditions return to normal.
Cros swind Assist detects strong crosswind
gusts that can impair the road holding of your
veh icle when driving straight ahead. Cros swind
Assist intervenes dependin g on thedirection
and strength of the crosswind .
A stabiliz ing brake application helps you to keep
the veh icleon track.
In formation appears inthe instrument cluster In
the event that Cros swind Assist intervenes
noticeably.
On vehicles without steering wheel buttons:
the d indicator lamp inthe instrument clus-
ter flashes.
On vehicles with steering wheel buttons: the
d indicator lamp inthe instrument cluster
flashes and the message Crosswind Assist
Activeappearsinthe multifunction display.
Cros swind Assist isactive above a veh iclespeed
of 50 mph (80 km/h) when the veh icle is driving
straight ahead or cornering gently.
Emergency exit
Emergency exit window
GWAR NING
The emergency exit wind ow cannotbelocked
in plac e. You risk injury ifyou exit the vehicle
through the emergency exit wind ow.
RMake sure that nobodybecomes tr apped,
both when closing and when opening the
emergency exit wind ow.
RThe opened emergency exit wind ow must
be held in plac eby another person.
Pay attention to traff icconditions.
GWAR NING
If the emergency exit wind owisunlocked
while driv ing,itcould open and slam shut and
consequently fall down. There isa risk of an
acc iden t and injury.
Before starting off, make sure that the emer-
gency exit wind owislocked and the locking
pin s are undamage d.
!Make sure there issuff icient clearance
when opening the emergency exit wind ow.Hold the open window in position. You could
otherwise damage the emergency exit win-
dow.
The emergency exit wind
owisintended for use
in an emergency only and must not be opened
unless the vehicle isstationary. The emergency
exit window isthe first window behind the driv-
er's seat on the driver's side. It is marked by the
"Emergency Exit" label.
XTo open: position both handles :vertically.
This willbreak locking pins ;.
The wind ow is unlocked.
XSwin g the window outward by the handles
and hold it in this position. Make sure there is
sufficient clearance when doing so.
XTo close: close the window.
XPosition both handles :horizontally. Make
sure that the locks =are inside infront of the
window frame.
The wind ow is locked.
XReplace locking pins ;at the latest before
starting on a new journey.
You can obtain information on this at any
qualif ied specialist workshop.
In an emergency, or after an accident, the vehi-
cle occupants can exit the vehicle through the
emergency exit wind ow.
Observe the foll owing notes to make sure that
the emergency exit window can be used safely in
the event of an emergency:
RBefore beginning a journey, inform the vehicle
occupants of the emergency exit wind ow and
explain how to use it. Make sure to explicitly
poin t out the risks describe d here.
ROnlyvehicle occupants who know how to use
the emergency exit wind ow are permitted to
sit next to it.
RAccess to the emergency exit wind ow must
remain unobstructed. Do not place any large
56Emergency exit
Safety
Useful information
This Operator's Manual describes all models as
well as standard and optional equipment of your
vehicle that were available at the time of going
to print. Country-specific variations are possi-
ble. Note that your vehicle may not be equipped
with all of the described functions. This also
applies to systems and functions relevant to
safety.
Read the information on qualified specialist
workshops (
Ypage 27).
Exterior lighting
Important safety notes
For reasons of safety, we recommend that you
drive with the lights switched on even during the
daytime. There may be differences in operation
due to legal requirements and voluntary recom-
mendations in some countries.
Bulb failure indicator
The bulb failure indicator is only an aid. You are
responsible for the proper functioning of the
vehicle lighting. Insufficient or non-functioning
vehicle lighting puts the operating safety of the
vehicle at risk.
For this reason, check the condition and func-
tion of your vehicle's lighting system and, if nec-
essary, that of the trailer before each journey.
The bulb failure indicator monitors all of the
exterior lighting lamps, except the perimeter
lamp and the trailer lighting. If a bulb fails, either
the b(
Ypage 34) indicator lamp lights up, or
you will see a corresponding message in the
display (
Ypage 182).
iDepending on the equipment, the bulb fail-
ure indicator can fail for all lamps with the
exception of the turn signal lamps.
Light switch
Operation
1 ÃAutomatic headlamp mode/daytime
running lamps
2$Lights off
3TParking lamps, license plate and
instrument lighting
4LLow-beam/high-beam headlamps
5NFog lamps
6RRear fog lamp
If you hear a warning tone when you leave the
vehicle, the lights may still be switched on.
XTurn the light switch to $orÃ.
or
XIf the rear fog lamp is switched on: press the
light switch in to the stop.
The turn signals, high-beam headlamps and the
high-beam flasher are operated using the com-
bination switch (
Ypage 82).
Low-beam headlamp
XTo switch on: turn the key to position 2in the
ignition lock or start the engine.
XTurn the light switch to position L.
The L indicator lamp in the instrument
cluster lights up.
Daytime running lamps
You can activate/deactivate the daytime run-
ning lamps function using the on-board com-
puter.
This is not possible in countries where daytime
running lamps are a legal requirement.
80Exterior lighting
Lights and windshield wipers
Highbeam Assist
General notes
You can use this function to set the headlamps
to change between low beam and high beam
automatically. The system recognizes vehicles
with their lights on, either approaching from the
opposite direction or traveling in front of your
vehicle, and consequently switches the head-
lamps from high beam to low beam.
Once the system no longer detects any other
vehicles, it reactivates the high-beam head-
lamps.
The system's optical sensor is located behind
the windshield near the overhead control panel.
Important safety notes
GWARNING
Highbeam Assist does not recognize road
users:
Rwho have no lights, e.g. pedestrians
Rwho have poor lighting, e.g. cyclists
Rwhose lighting is blocked, e.g. by a barrier
In very rare cases, Highbeam Assist may fail to
recognize other road users who have lights, or
may recognize them too late. In this or similar situations, the automatic high-beam head-
lamps will not be deactivated or will be acti-
vated regardless. There is a risk of an acci-
dent.
Always carefully observe the traffic conditions
and switch off the high-beam headlamps in
good time.
Highbeam Assist cannot take into account road,
weather or traffic conditions. Highbeam Assist
is only an aid. You are responsible for adjusting
the vehicle's lighting to the prevailing light, vis-
ibility and traffic conditions.
In particular, the detection of obstacles can be
restricted if there is:
Rpoor visibility, e.g. due to fog, heavy rain or
snow
Rdirt on the sensors or anything else covering
the sensors
Activating/deactivating Highbeam
Assist
XTo activate: switch on the Highbeam Assist
function using the on-board computer
(
Ypage 168).
XTurn the light switch to the Ãposition.
XPress the combination switch beyond the
pressure point in the direction of arrow :
(
Ypage 82).
Highbeam Assist is active.
The _ or
indicator lamp in the
multifunction display lights up when it is dark
and the light sensor activates the low-beam
headlamps.
If you are driving at speeds above approx-
imately 22 mph (35 km/h) and no other road
users have been detected:
The high-beam headlamps are switched on
automatically. The Kindicator lamp in the
instrument cluster also lights up.
If you are driving at speeds below approx-
imately 19 mph (30 km/h), other road users
are recognized or the roads are adequately lit:
The high-beam headlamps are switched off
automatically. The Kindicator lamp in the
instrument cluster goes out. The _or
indicator lamp in the multifunction
display remains lit.
XTo deactivate: move the combination switch
back to its normal position or move the light
switch to another position.
The _ or
indicator lamp in the
multifunction display goes out.
Headlamps fogged up on the inside
The headlamps may fog up on the inside if there is high atmospheric humidity.
XSwitch on the low-beam headlamps and drive
off.
The level of moisture diminishes, depending
on the length of the journey and the weather
conditions (humidity and temperature).
If the level of moisture does not diminish:
XHave the headlamps checked at a qualified
specialist workshop.
84Exterior lighting
Lights and windshield wipers