
Setting the unit (vehicles with
steering wheel buttons) ................. 169
Theft deterrent systems
Immobilizer ...................................... 56
Tow-away alarm ............................... 57
Tightening torques for wheel nuts/
wheel bolts ........................................ 271
Time
Setting the time (vehicles with
steering wheel buttons) ................. 171
Setting the time (vehicles without
steering wheel buttons) ................. 164
Timer
Activating ....................................... 115
Auxiliary heating ............................ 114
Important safety notes .................. 114
Overview ........................................ 114
Setting the heating level (auxiliary
heating) ......................................... 116
Setting the preselection time
(auxiliary heating) .......................... 115
Setting weekday, time and oper-
ating duration (auxiliary heating) ... 115
Switching immediate heating
mode on/off (auxiliary heating) ..... 115
Tire pressure
Calling up (on-board computer) ..... 253
Checking manually ........................ 253
Display messages (vehicles with
steering wheel buttons) ................. 191
Display messages (vehicles with-
out steering wheel buttons) ........... 178
Maximum ....................................... 252
Notes ............................................. 251
Recommended ............................... 250
Setting the unit (vehicles with
steering wheel buttons) ................. 170
Tire label ........................................ 251
Tire pressure loss warning system .. 255
Tire pressure monitor
Checking the tire pressure elec-
tronically ........................................ 254
Display message ............................ 191
Function/notes ............................. 253
Indicator lamp ................................ 202
Restarting ...................................... 255
Warning lamp ................................. 255
Tire pressure table ............................ 257 Tires
Aspect ratio (definition) ................. 265
Average weight of the vehicle
occupants (definition) .................... 264
Bar (definition) ............................... 264
Chang ing a w
heel .......................... 266
Characteristics .............................. 264
Checking ........................................ 248
Curb weight (definition) ................. 265
Definition of terms ......................... 264
Direction of rotation ...................... 267
Distribution of the vehicle occu-
pants (definition) ............................ 266
DOT (Department of Transporta-
tion) (definition) ............................. 264
DOT, Tire Identification Number
(TIN) ............................................... 263
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 264
GTW (Gross Trailer Weight) (defi-
nition) ............................................ 264
GVW (Gross Vehicle Weight) (def-
inition) ........................................... 264
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 265
Important safety notes .................. 247
Increased vehicle weight due to
optional equipment (definition) ...... 264
Kilopascal (kPa) (definition) ........... 265
Labeling (overview) ........................ 261
Load bearing index (definition) ...... 266
Load index ..................................... 263
Load index (definition) ................... 265
M+S tires ....................................... 249
Maximum load on a tire (defini-
tion) ............................................... 265
Maximum loaded vehicle weight
(definition) ..................................... 265
Maximum permissible tire pres-
sure (definition) ............................. 265
Maximum tire load ......................... 263
Maximum tire load (definition) ....... 265
Optional equipment weight (defi-
nition) ............................................ 265
PSI (pounds per square inch) (def- inition) ........................................... 265
Replacing ....................................... 266
Service life ..................................... 248
18Index

Sidewall (definition) ....................... 265
Snow chains .................................. 249
Speed rating (definition) ................ 264
Storing ........................................... 267
Structure and characteristics
(definition) ..................................... 264
Summer tires ................................. 249
TIN (Tire Identification Number)
(definition) ..................................... 265
Tire bead (definition) ...................... 265
Tire pressure (definition) ................ 265
Tire pressures (recommended) ...... 264
Tire size (data) ....................... 257, 272
Tire size designation, load-bearing
capacity, speed rating .................... 261
Tire tread ....................................... 248
Tire tread (definition) ..................... 265
Total load limit (definition) ............. 266
Traction (definition) ....................... 266
TWR (permissible trailer drawbar
noseweight) (definition) ................. 266
Uniform Tire Quality Grading
Standards (definition) .................... 264
Wear indicator (definition) ............. 266
Wheel rim (definition) .................... 264
Top Tether ............................................ 50
Touchshift (automatic transmis-
sion) .................................................... 125
Tow-away alarm
Arming/deactivating ........................ 57
Deactivating ..................................... 57
Operation ......................................... 57
Tow-starting
Emergency engine starting ............ 246
Important safety notes .................. 243
Towing
If the vehicle is stuck ..................... 245
Installing/removing the towing
eye ................................................. 244
With a raised front or rear axle ...... 245
Towing a trailer
Axle load, permissible .................... 287
Cleaning the trailer tow hitch ......... 237
Coupling up a trailer ...................... 157
Decoupling a trailer ....................... 159
Driving tips .................................... 155
Important safety notes .................. 155
Notes on retrofitting ...................... 286 Trailer loads ................................... 287
Tow ing aw
ay
Important safety guidelines ........... 243
In the event of malfunctions .......... 244
With both axles on the ground ....... 245
Trailer
Brake force booster malfunction ... 195
Trailer coupling
see Towing a trailer
Trailer loads and drawbar nose-
weights ............................................... 159
Trailer towing
Blind Spot Assist ............................ 146
PARKTRONIC ................................. 153
Permissible trailer loads and
drawbar noseweights ..................... 159
Transmission
see Automatic transmission
Transmission oil ................................ 282
Transport
Loading guidelines ......................... 212
Vehicle ........................................... 246
Transport by rail ................................ 135
Transportation
Rail ................................................ 135
Transporting
Load distribution ............................ 214
Securing a load .............................. 214
Trim pieces (cleaning instruc-
tions) .................................................. 238
Trip computer (on-board com-
puter) .................................................. 174
Trip meter
see Trip odometer
Trip odometer
Display (vehicles with steering
wheel buttons) ............................... 167
Display (vehicles without steering
wheel buttons) ............................... 163
Resetting ....................................... 162
see Trip computer (on-board computer)
Turn signals
Replacing bulbs (front) ..................... 88
Replacing bulbs (rear) ...................... 89
Switching on/off .............................. 81
Turn signals (Chassis Cab)
Replacing bulbs (rear) ...................... 90
Index19

Twin front-passenger seatStowage compartment .................. 206
Two-way radios
Type approval/frequency .............. 275
TWR (Tongue Weight Rating) (defi-
nition) ................................................. 266
U
Unlocking
From inside the vehicle (central
unlocking button) ............................. 64
USB port ............................................. 211
V
Vehicle
Data acquisition ............................... 29
Display message ............................ 192
Electronics ..................................... 275
Equipment ....................................... 22
Individual settings (vehicles with
steering wheel buttons) ................. 168
Limited Warranty ............................. 22
Loading .......................................... 258
Locking (SmartKey) .......................... 59
Lowering ........................................ 271
Maintenance .................................... 23
Operating safety .............................. 25
Parking for a long period ................ 132
Pulling away ................................... 121
Raising ........................................... 268
Registration ..................................... 27
Reporting problems ......................... 27
Securing from rolling away ............ 130
Towing away .................................. 243
Transporting .................................. 246
Unlocking (SmartKey) ...................... 59
Vehicle battery
see Battery (vehicle)
Vehicle bodies ..................................... 27
Body/equipment mounting direc-
tives for trucks ................................. 27
Vehicle data ....................................... 285
Vehicle identification number .......... 276
Vehicle identification plate .............. 276
Vehicle tool kit .................................. 240 Vents
see Air vents
Voltage supply
Fuses ............................................. 246
W
Warning Stickers ........................................... 24
Warning and indicator lamp
Diesel particle filter ....................... 201
Power assistance for the steering .. 203
Warning and indicator lamps
Brakes ........................................... 195
Check Engine ................................. 200
Coolant .......................................... 199
Diesel Exhaust Fluid (DEF) ............. 197
Electrical step ................................ 203
ESP
®.............................................. 194
ESP®function ................................ 197
Overview .......................................... 33
Seat belt ........................................ 203
Warning lamp .................................... 241
Warning triangle ................................ 241
Warning- and indicator lamps
ABS ................................................ 195
Air filter .......................................... 201
ASR ................................................ 194
BAS ................................................ 195
Battery charge ............................... 198
Brake wear .................................... 198
Bulbs .............................................. 203
Doors ............................................. 203
Engine oil level ............................... 198
Preglow .......................................... 201
Reserve fuel ................................... 200
Tire pressure monitor .................... 202
Water separator ............................. 202
Windshield washer fluid ................. 202
Warranty .............................................. 22
Washer fluid
Adding ........................................... 224
Capacities ...................................... 285
Display message ............................ 193
Indicator lamp ................................ 202
Notes ............................................. 284
Wiping with ...................................... 93
20Index

Cockpit
FunctionPage
:Door control panel37
;Light switch79
=Combination switch
• turn signals81
• high-beam headlamps81
• windshield wipers93
• rear window wiper94
?Cruise control lever140
ASteering wheel without or
with buttons35
BInstrument cluster32
CStowage compartment
• 3.5 mm audio jack211
• USB port211
DTimer for the auxiliary warm-
air heater (auxiliary heating)114
E• Stowage compartment
with interior light84
• Overhead control panel36
FRear-view mirror78
FunctionPage
GPARKTRONIC warning dis-
play151
HOpens/closes the right-hand
side window71
IStowage compartment (jack
and vehicle tool kit)240
JGlove box204
KCenter console35
LSelector lever (automatic
transmission)124
MIgnition lock119
NFurther control panels37
OSteering wheel buttons35
PEngages/releases the park-
ing brake136
QHorn
ROpens the hood218
SSteering wheel buttons35
Cockpit31
At a glance

Steering wheel buttons
FunctionPage
:Display164
On-board computer opera-
tion
;Selects a submenu or adjusts
the volume164
WUp/increases the vol-
ume
X Down/reduces the vol-
ume
Using the telephone175
6 Accepts a call/starts
dialing
~ Ends a call/rejects an
incoming call
=Scrolls from one menu to
another164
V Forwards
UBack
Scrolls within a menu164
9Forwards
:Back
Center console
FunctionPage
:Stowage compartment205
;Audio 10 or Audio 15 (see the
separate operating instruc-
tions)
=Air-conditioning control
panel97
Paper holder1207
?Center console control
panel
cSwitches the left/right-hand
seat heating on/off76
zSwitches the windshield
heating on/off104
|Switches the rear window
defroster on/off104
fActivates/deactivates
PARKTRONIC153
£Switches the hazard warning
lamps on/off82
1Only on vehicles without rear-compartment climate control.
Center console35
At a glance

FunctionPage
àActivates/deactivates ASR53
Ã
ÄCentral locking, interior/rear
compartment64
æActivates/deactivates the
distance warning function143
jActivates/deactivates Lane
Keeping Assist147
kActivates/deactivates Blind
Spot Assist144
A• Stowage compartment or
• CD changer; see the sepa-
rate operating instructions,
or
BCup holder with:208
• Ashtray209
• Cigarette lighter209
C12 V socket210
Overhead control panel
FunctionPage
:Microphone for the mobile
phone210
;Switches the right-hand
reading lamp on/off84
=Switches the automatic inte-
rior lighting on/off84
?• Eyeglasses compartment
or205
• Anti-Theft Alarm system
(ATA)56
ASwitches the interior lighting
on/off84
BSwitches the left-hand read-
ing lamp on/off84
36Overhead control panel
At a glance

A malfunction has occurred if the6restraint
system warning lamp:
Rdoes not light up after the ignition is switched
on
Rdoes not go out after a few seconds
Rgoes out but then lights up again while the
engine is running, for example
GWARNING
If restraint system is malfunctioning, restraint
system components may be triggered unin-
tentionally or might not be triggered at all in
the event of an accident with a high rate of
vehicle deceleration. This can affect the Emer- gency Tensioning Device or air bag, for exam-
ple. This poses an increased risk of injury or
even fatal injury.
Have the restraint system checked and
repaired in a qualified specialist workshop as
soon as possible.
Seat belts
Introduction
A correctly fastened seat belt is the most effec- tive means of restraining the movement of vehi-
cle occupants in the event of an accident or the
vehicle rolling over. This reduces the risk of
vehicle occupants coming into contact with
parts of the vehicle interior or being thrown from
the vehicle. Furthermore, the seat belt helps to
keep the vehicle occupants in the best position
in relation to the air bag.
The seat belt system consists of:
RSeat belts
REmergency Tensioning Devices for the front
seat belts
If the vehicle is equipped with a front air bag,the seat belt system also includes a seat belt
force limiter for the corresponding seat.
On vehicles with a front-passenger bench
seat, only the seat belt of the outer front-
passenger seat has a seat belt force limiter.
If the vehicle does not have a driver's air bag, the
seat belt system does not include an Emergency
Tensioning Device or a seat belt force limiter.
If the seat belt is pulled quickly or suddenly from
the belt outlet, the inertia reel locks. The belt
strap cannot be pulled out further. Emergency Tensioning Devices tighten the seat
belts in an accident, pulling them close against
the occupant's body. They do not, howe
ver, pull
vehicle occupants back towards the backrest.
Emergency Tensioning Devices do not correct
an incorrect seat position or incorrectly worn
seat belts.
When triggered, the seat belt force limiter
reduces the force exerted by the seat belt on the
vehicle occupant.
The seat belt force limiters are synchronized
with the front air bags, which absorb part of the
deceleration force. This makes it possible to
reduce the forces to which vehicle occupants
are subjected during an accident.
The Emergency Tensioning Device of the co-
driver's seat is triggered independently of the
lock status of the seat belt.
Important safety notes
The use of seat belts and child restraint systems
is required by law in:
Rall 50 states
Rthe U.S. territories
Rthe District of Columbia
Rall Canadian provinces
Even where this is not required by law, all vehicle
occupants should correctly fasten their seat
belts before starting the journey.
GWARNING
If the seat belt is incorrectly fastened, it can-
not protect as intended. Furthermore, an
incorrectly fastened seat belt can cause addi-
tional injury, for example, in an accident, dur-
ing braking or when abruptly changing direc-
tion. This poses an increased risk of injury or
even fatal injury.
Make sure that all vehicle occupants are
seated properly with a correctly fastened seat belt.
GWARNING
The seat belt does not offer the intended level of protection if you have not moved the back-
rest to an almost vertical position. When brak-
ing or in the event of an accident, you could
slide underneath the seat belt and sustain
abdomen or neck injuries, for example. This
40Occupant safety
Safety

RThe seat belt is not routed over sharp, pointed
or fragile objects.
If these items are on or in your clothing, e.g.
eyeglasses, pens, keys, etc., stow these items
in a more suitable location.
ROnly one person should use each seat belt at
any one time.
On no account should babies or children
travel sitting on the lap of another vehicle
occupant. During an accident, they could be
crushed between the occupant and seat belt.
RObjects are not secured with a seat belt if theseat belt is being used by one of the vehicle’s
occupants.
Also make sure that there are no objects, e.g.
cushions, between the occupant and the seat.
Seat belts are solely intended for the protection
and restraint of the vehicle occupants. To
secure objects, luggage or loads, always
observe the "Loading guidelines" (
Ypage 212).
Fastening and adjusting seat belts
Observe the safety notes on the seat belt
(Ypage 40) and the notes on correct use of seat
belts (Ypage 41).
Basic illustration
XAdjust the seat (Ypage 72).
The seat backrest must be in an almost ver-
tical position.
XPull the seat belt smoothly from belt outlet =
and engage belt tongue ;into belt
buckle :.
XIf necessary, pull upwards on the shoulder
section of the seat belt to tighten the belt
across your body.
The shoulder section of the seat belt must
always be routed across the center of the shoul-
der. Adjust the belt outlet if necessary.
XTo raise: slide belt outlet =upwards.
The belt outlet will engage in various posi-
tions.
XTo lower: hold belt outlet release ?and slide
the belt outlet =downwards.
XLet go of belt outlet release ?in the desired
position and make sure that the belt outlet
engages.
All seat belts except the driver's seat belt are
equipped with a special seat belt retractor to
securely fasten child restraint systems in the
vehicle. Further information can be found under
"Special seat belt retractor" (
Ypage 48).
Releasing seat belts
!Make sure that the seat belt is fully rolled up.
Otherwise, the seat belt or belt tongue will be
trapped in the door or in the seat mechanism.
This could damage the door, the door trim
panel and the seat belt. Damaged seat belts
can no longer fulfill their protective function
and must be replaced. Visit a qualified spe-
cialist workshop.
42Occupant safety
Safety