Position of exterior mirror, front-
passenger side ...............................1
29
Reversing camera .......................... 248
see PARKTRONIC
Parking aid
Active Parking Assist ..................... 243
see Exterior mirrors
see PARKTRONIC
Parking assistance
see PARKTRONIC
Parking brake
Display message ............................ 320
Electric parking brake .................... 213
Warning lamp ................................. 361
Parking lamps
Display message ............................ 333
Switching on/off ........................... 136
PARKTRONIC
Deactivating/activating ................. 242
Driving system ............................... 240
Function/notes ............................ .240
Important safety notes .................. 240
Problem (fault) ............................... 243
Sensor range ................................. 240
Trailer towing ................................. 240
Warning displa y............................. 241
PASSENGER AIR BAG
Indicator lamps ................................ 46
PASSENGER AIR BAG indicator
lamp
Problem (malfunction) ................... 330
Perfume atomizer
Operating ....................................... 170
Perfume vial ................................... 170
Problem (malfunction) ................... 172
Petrol .................................................. 472
Pets in the vehicle ............................... 75
Plastic trim (cleaning instruc-
tions) .................................................. 407
Power windows
see Side windows
Pre-entry climate control (via key)
Problems (malfunctions) ................ 174
PRE-SAFE® (anticipatory occupant
protection)
Operation ......................................... 62 PRE-SAFE® (preventive occupant
safety system)
Display message ............................ 325
PRE-SAFE® Brake
Activating/deactivating ................. 311
Display message ............................ 325
Function/note s................................ 84
Important safety notes .................... 84
Warning lamp ................................. 365
PRE-SAFE® PLUS (anticipatory
occupant protection PLUS)
Operation ......................................... 62
Protection against theft
ATA (Anti-Theft Alarm system )......... 87
Immobiliser ...................................... 86
Interior motion sensor ..................... 88
Tow-away protection ........................ 87
Protection of the environment
General notes .................................. 24
Pulling away
Automatic transmission ................. 189
Hill start assist ............................... 189
Hybrid operation ............................ 280
Manual transmission ...................... 188
Trailer ............................................ 189 Q
Qualified specialist workshop ........... 27 R
Radiator cover ................................... 396
Radio
Selecting a station ......................... 304
Radio-based vehicle components
Declaration of conformity ................ 27
Rain closing feature
Panorama sliding sunroof .............. 113
Sliding sunroof ............................... 112
RBS (Recuperative Brake System)
Driving safety systems ..................... 44
Important safety notes .................... 44
Warning lamp ................................. 364
Reading lamp ..................................... 140
READY indicator ................................ 279
Rear compartment
Setting the air vents ...................... 182 Index
17
Telephone compartment ................3
72
Temperature
Coolant (display in the instrumentcluster) .......................................... 295
Coolant (display in the on-board
computer) ...................................... 309
Outside temperature ..................... .295
Setting (climate control) ................ 163
TEMPOMAT
Function/notes ............................ .220
TIREFIT kit .......................................... 414
Top Tether ............................................ 65
Total distance recorder .................... 300
Tow-away protection
Activating ......................................... 88
Deactivating ..................................... 88
Function .......................................... .87
Tow-starting
Emergency engine starting ............ 428
Important safety notes .................. 424
Towing
Important safety notes .................. 424
Notes for 4MATIC vehicles ............ 427
With the rear axle raised ................ 426
Towing a trailer
Active Blind Spot Assist ................. 269
Active Lane Keeping Assist ............ 272
Active Parking Assist ..................... 243
Axle load, permissibl e.................... 482
Bulb failure indicator for LED
lamps ............................................. 290
ESP® (Electronic Stability Pro-
gram) ............................................... 83
General notes ................................ 287
Pulling away with a traile r.............. 189
Trailer tow hitch display message .. 349
Towing away
Fitting the towing eye .................... 426
Removing the towing eye ............... 426
With both axles on the ground ....... 427
Towing eye ......................................... 411
Traffic Sign Assist
Activating ....................................... 261
Activating/deactivating the warn-
ing function .................................... 310
Display message ............................ 342
Function/note s............................. 260
Important safety notes .................. 261 Instrument cluster display ............. 261
Trailer coupling
see Towing a trailer
Trailer towing
7-pin connecto r............................. 290
Blind Spot Assist ............................ 264
Cleaning the trailer tow hitch ......... 406
Coupling up a traile r...................... 288
Decoupling a trailer ....................... 289
Driving tip s.................................... 287
Folding in the ball coupling ............ 289
Folding out the ball coupling .......... 288
Important safety notes .................. 286
Lights display message .................. 331
Mounting dimensions .................... 478
Parktronic ...................................... 240
Power supply ................................. 290
Problem (fault) ............................... 292
Trailer load s................................... 480
Transfer case ..................................... 204
Transmission
see Automatic transmission
see Manual transmission
Transmission position display ......... 199
Transmission position display
(DIRECT SELECT lever) ...................... 199
Transporting the vehicle .................. 427
Trim pieces (cleaning instruc-
tions) .................................................. 407
Trip computer (on-board com-
puter) .................................................. 301
Trip meter
Calling up ....................................... 300
Resetting (on-board computer) ...... 301
Turn signals
Changing bulbs (front) ................... 144
Changing bulbs (rear) .................... 144
Switching on/of f........................... 137
TV
Operating (on-board computer) ..... 306
Two-way radio
Frequencies ................................... 468
Installation ..................................... 468
Transmission output (maximum) .... 468
Type identification plate
see Vehicle identification plate Index
21
Cockpit
Function Page
:
Steering wheel gearshift
paddles
202
;
Combination switch 137
=
Horn
?
Instrument cluster 34
A
DIRECT SELECT lever 197
B
Climate control systems 152
C
Overhead control panel 39
D
Control panel for COMAND
Online and vehicle func-
tions
37
E
Ignition lock 185
Start/Stop button 185
F
Adjusts the steering wheel 125
G
Cruise control lever 220 Function Page
H
Electric parking brake 213
I
Diagnostics connection 27
J
Opens the bonnet 395
K
Light switch 134
L
Control panel for:
Activating Steering Assist 234
Activating Active Lane
Keeping Assist 269
Deactivating PARKTRONIC 240
Switching on 360° camera 253
Switching on the head-up
display
297
Vehicles without a driver
assistance system: map/
coin holder32
CockpitAt a glance
Function Page
:
Overhead control panel 39
;
Climate control systems 152
=
Combination switch 137
?
Instrument cluster 34
A
Horn
B
DIRECT SELECT lever 197
C
Steering wheel gearshift
paddles
202
D
Control panel for:
Activating Steering Assist 234
Activating Active Lane
Keeping Assist
269
Deactivating PARKTRONIC 240
Switching on 360° camera 253
Switching on the head-up
display
297
Vehicles without a driver
assistance systems: map/
coin holder Function Page
E
Light switch 134
F
Opens the bonnet 395
G
Diagnostics connection 27
H
Electric parking brake 213
I
Ignition lock 185
Start/Stop button 185
J
Adjusts the steering wheel 125
K
Cruise control lever 220
L
Control panel for COMAND
Online and vehicle func-
tions
37Cockpit
33At a glance
Have the restraint system checked and
repaired immediately at a qualified specialist
workshop. After an accident, immediately
switch the ignition off and remove the key
from the ignition lock.
If components of the restraint system are
activated during an accident, the hybrid sys-
tem is automatically deactivated.
The hybrid system is not activated when the
vehicle is started if:
R a short circuit is detected in the hybrid sys-
tem.
R a hybrid system electrical connection is
disconnected.
This ensures that you do not come into con-
tact with high voltage.
Manual deactivation of the hybrid sys-
tem The hybrid system can be deactivated man-
ually using the high voltage switch-off device.
! To prevent damage to the hybrid system
please observe the following instructions:
R only deactivate the hybrid system man-
ually in the following situations.
R work on the hybrid system may only be
carried out at a qualified specialist work-
shop, even when it has been deactivated
manually.
R if the 6 restraint system warning lamp
in the instrument cluster lights up after an
accident.
R if the vehicle is badly damaged, e.g. after an
accident, and the restraint system compo-
nents were not activated.
R if the vehicle is badly damaged and has to
be towed or transported.
X If possible, move the vehicle out of the
danger zone: shift the automatic transmis-
sion into position N.
X Release the electric parking brake.
X Roll the vehicle to a safe place and park it
safely. Get assistance from others if necessary.
The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning. There is therefore a risk of being
locked out if the vehicle is being pushed or
tested on a dynamometer.
X Switch the ignition off.
X Shift the automatic transmission to park
position P.
Apply the electric parking brake
(Y page 213).
Secure the vehicle to prevent it from rolling
away (Y page 443).
X To use the high-voltage switch-off
device: open the bonnet. X
Press release clip :in the direction of the
arrow and pull it out.
X Pull high voltage switch-off device ;apart
until it engages in the stop position.
High-voltage battery G
WARNING
In the event of a vehicle fire, the internal pres- sure of the high-voltage battery could exceeda critical value. In this case, flammable gas
escapes through a vent valve in the vehicle's
underbody. The gas can ignite. There is a risk
of injury.
Leave the danger area immediately. Secure
the danger area at a suitable distance, whilst
observing legal requirements. Hybrid vehicles
43Safety Z
PRE-SAFE
®
(anticipatory occupant
protection)
Introduction PRE-SAFE
®
takes pre-emptive measures to
protect occupants in certain hazardous sit-
uations.
Important safety notes !
Make sure that there are no objects in the
footwell under or behind the seats when
moving the seats back. There is a risk that
the seats and/or the objects could be dam-
aged.
Although your vehicle is equipped with a PRE-
SAFE ®
system, the possibility of injury in the
event of an accident cannot be ruled out.
Always adapt your driving style to suit the
prevailing road and weather conditions and
maintain a safe distance from the vehicle in
front. Drive carefully.
Function PRE-SAFE
®
intervenes:
R in emergency braking situations, e.g. when
BAS is activated
R in critical driving situations, e.g. when phys-
ical limits are exceeded and the vehicle
understeers or oversteers severely
R vehicles with the Driving Assistance pack-
age: when a driver assistance system inter-
venes powerfully or the radar sensor sys-
tem detects an imminent danger of colli-
sion in certain situations
PRE-SAFE ®
takes the following measures
depending on the hazardous situation detec-
ted:
R the front seat belts are pre-tensioned.
R if the vehicle skids, the sliding sunroof and
the side windows are closed so that only a
small gap remains. The panorama sliding
sunroof is completely closed.
R vehicles with the memory function for the
front-passenger seat: the front-passenger seat is adjusted if it is in an unfavourable
position.
If the hazardous situation passes without
resulting in an accident, PRE-SAFE ®
slackens
the belt pre-tensioning. All settings made by
PRE-SAFE ®
can then be reversed.
If the seat belt pre-tensioning is not reduced:
X Move the seat backrest or seat back
slightly when the vehicle is stationary.
Seat belt pre-tensioning is reduced and the
locking mechanism is released.
The seat-belt adjustment is an integral part of
the PRE-SAFE ®
convenience function. You
will find information on the convenience func-
tion under "Belt adjustment" (Y page 50). PRE-SAFE
®
PLUS (anticipatory occu-
pant protection PLUS)
Introduction PRE-SAFE
®
PLUS is only available in vehicles
with the Driving Assistance package.
Using the radar sensor system, PRE-SAFE ®
PLUS is able to detect that a head-on or rear-
end collision is imminent. In certain hazard-
ous situations, PRE-SAFE ®
PLUS takes pre-
emptive measures to protect the vehicle
occupants.
Important safety notes The intervention of PRE-SAFE
®
PLUS cannot
prevent an imminent collision.
The driver is not warned when PRE-SAFE ®
PLUS intervenes.
PRE-SAFE ®
PLUS does not intervene:
R if the vehicle is reversing
R when the vehicle is towing a trailer and
there is a risk of a rear-end collision
PRE-SAFE ®
PLUS does not perform braking
actions while the vehicle is in motion or when
Parking Guidance is active. 62
Occupant safetySafety
G
WARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking X
Keep the brake pedal depressed firmly until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated. BAS PLUS (Brake Assist PLUS) with
Cross-Traffic Assist
General notes i
Observe the "Important safety notes" sec-
tion (Y page 76).
BAS PLUS is only available on vehicles with
the Driving Assistance package.
For BAS PLUS to assist you when driving, the radar sensor system and the camera system
must be operational.
With the help of a sensor system and a cam-
era system, BAS PLUS can detect obstacles:
R that are in the path of your vehicle for an
extended period of time
R that cross the path of your vehicle
In addition, pedestrians in the path of your
vehicle can be detected.
BAS PLUS detects pedestrians using typical
characteristics such as the body contours
and posture of a person standing upright.
If the radar sensor system or the camera sys- tem is malfunctioning, BAS PLUS functions
are restricted or no longer available. The
brake system is still available with complete
brake boosting effect and BAS. i
Observe the restrictions described in the
"Important safety notes" section
(Y page 77).
BAS PLUS can help you to minimise the risk of
a collision with a vehicle or a pedestrian and
reduce the effects of such a collision. If BAS
PLUS detects a danger of collision, you are
assisted when braking.
Important safety notes G
WARNING
BAS PLUS cannot always clearly identify
objects and complex traffic situations.
In such cases, BAS PLUS may:
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
BAS PLUS does not react:
R to small people, e.g. children
R to animals
R to oncoming vehicles
R when cornering
As a result, BAS PLUS may not intervene in all
critical situations. There is a risk of an acci-
dent.
Always pay careful attention to the traffic sit- uation and be ready to brake.
In the event of snowfall or heavy rain, detec-
tion can be impaired.
Detection by the radar sensor system is also
impaired in the event of:
R dirt on the sensors or obscured sensors
R interference by other radar sources
R strong radar reflections, for example, in
multi-storey car parks
R a narrow vehicle travelling in front, e.g. a
motorcycle Driving safety systems
77Safety Z
R
a vehicle travelling in front on a different
line
R vehicles quickly moving into the radar sen-
sor system detection range
Detection by the camera system is also
impaired in the event of:
R dirt on the camera or if the camera is cov-
ered
R glare on the camera system, e.g. from the
sun being low in the sky
R darkness
R if:
- pedestrians move quickly, e.g. into the
path of the vehicle
- the camera system no longer detects a
pedestrian as a person due to special
clothing or other objects
- a pedestrian is concealed by other
objects
- the typical outline of a person is not dis-
tinguishable from the background
Following damage to the front end of the vehi-
cle, have the radar sensor settings and oper- ation checked at a qualified specialist work-
shop. This also applies to collisions at slow
speeds where there is no visible damage to
the front of the vehicle.
Following damage to the windscreen, have
the configuration and operation of the cam-
era system checked at a qualified specialist
workshop.
Function To avoid a collision, BAS PLUS calculates the
brake force necessary if:
R you approach an obstacle and
R BAS PLUS has detected a risk of collision
When driving at a speed under 30 km/h : if
you depress the brake pedal, BAS PLUS is
activated. Braking assistance from BAS PLUS
is carried out at the last possible moment.
When driving at a speed above 30 km/h : if
you depress the brake pedal sharply, BAS PLUS automatically increases the brake pres-
sure to a degree suited to the traffic situation.
BAS PLUS provides braking assistance in haz-
ardous situations with vehicles in front within
a speed range between 7 km/h and
250 km/h.
At speeds of up to approximately 70 km/h,
BAS PLUS can react to:
R stationary objects in the path of your vehi-
cle, e.g. stopped or parked vehicles
R pedestrians in the path of your vehicle
R obstacles crossing your path, which move
in the detection range of the sensors and
are recognised by them
i If BAS PLUS demands particularly high
braking force, preventative passenger pro-
tection measures (PRE-SAFE ®
) are activa-
ted simultaneously.
X Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
BAS PLUS is deactivated and the brakes func-
tion as usual again if:
R you release the brake pedal
R there is no longer a risk of collision
R no obstacle is detected in front of your
vehicle
R you depress the accelerator pedal
R you activate kickdown COLLISION PREVENTION ASSIST
PLUS
General notes COLLISION PREVENTION ASSIST PLUS con-
sists of a distance warning function with an
autonomous emergency braking function and
adaptive Brake Assist.
COLLISION PREVENTION ASSIST PLUS can
help you to minimise the risk of a collision
with the vehicle in front or reduce the effects of such a collision. 78
Driving safety systemsSafety