
Folding in the ball coupling
i
Fold the ball coupling back in if you are not
using the trailer tow hitch.
X Place the protective covering on the ball cou-
pling.
Opening the cover: X Turn handle :anti-clockwise and fold down
cover ;.
Unlocking and lowering the ball coupling:
X Pull out release wheel ?.
X Turn release wheel ?anti-clockwise.
The ball coupling unlocks and lowers. Indica-
tor lamp =flashes.
X Press the ball coupling in the direction of the
arrow until it engages behind the bumper.
Indicator lamp =goes out and the message
in the multifunction display disappears. Coupling up a trailer
X Make sure that the transmission is in position
P .
X Apply the parking brake.
X Position the trailer horizontally behind the
vehicle.
X Couple up the trailer.
X Establish the electric connection between the
vehicle and the trailer.
X Check that the trailer lighting system is work-
ing.
A connected trailer is only recognised when
the electrical connection is established cor-
rectly and when the lighting system is working
properly. The function of other systems, such
as ESP ®
, PARKTRONIC and Active Parking
Assist also depends on this. Uncoupling a trailer
G
WARNING
If you uncouple a trailer with an engaged over- run brake, you could trap your hand between
the vehicle and the trailer drawbar. This poses a risk of injury.
Do not uncouple a trailer with an engaged
overrun brake. G
WARNING
Vehicles with level control:
If you disconnect the trailer cable, the vehicle is lowered. This can cause you or others to
become trapped between the vehicle body
and tyres, or underneath the vehicle. This
poses a risk of injury.
Make sure that no-one is in the immediate
vicinity of the wheel arch or underneath the
vehicle when disconnecting the trailer cable.
! Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your vehicle could
be damaged by the rebounding of the overrun
brake.
X Make sure that the transmission is in position
P.
X Apply the parking brake.
X Secure the trailer against rolling away.
X Remove the trailer cable and decouple the
trailer. Trailer power supply
! You can connect accessories to the perma-
nent power supply up to a maximum of 240 W.
You cannot charge a trailer battery using the
power supply.
X To switch the connected power supply on
or off: turn the key in the ignition lock to
position 2or 0respectively (Y page 139).
When it leaves the factory, your vehicle's trailer
socket is equipped with a permanent power
supply and a power supply that is switched on
via the ignition lock.
The permanent power supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin 10.
The trailer's permanent power supply is
switched off in the event of low vehicle supply
voltage and after six hours at the latest.
You can find more information about fitting the
trailer electrics at a qualified specialist work-
shop. Towing a trailer
211Driving and parking Z

Failure check for LEDs
i If LED lamps are fitted in the trailer, a mal-
function message may appear in the multi-
function display even if there is no fault. The
reason for the error message may be that the
current has fallen below the minimum of
50 mA.
To ensure reliable indication of the failure, each
LED chain in the trailer lighting must be guaran- teed a minimum current of 50 mA. Trailer with 7-pin connector
General notes Trailer with 7-pin connector:
you can connect
to the 13-pin socket on the ball coupling using
an adapter or, if necessary, an adapter cable.
Both can be obtained at a qualified specialist
workshop.
Fitting the adapter !
Make sure that there is sufficient cable play
so that the cable cannot become detached
when cornering. X
Open the socket cover.
X Insert the plug connector with lug :into
groove =on the socket.
X Turn bayonet connection ;clockwise to the
stop.
X Let the cover engage.
X If you are using an adapter cable, secure the
cable to the trailer with cable ties. 212
Towing a trailerDriving and pa
rking

Important safety notes
G
WARNING
Operating the integrated information systems and communications equipment in the vehicle
while driving will distract you from traffic con-
ditions. You could then lose control of the
vehicle. There is a risk of an accident.
Only operate these devices if road traffic con-
ditions permit. If you are unsure about the
surrounding conditions, pull over to a safe
location and make entries only while the vehi-
cle is stationary.
You must observe the legal requirements for the country in which you are currently driving whenoperating the on-board computer. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognise function
restrictions relevant to safety. The operating
safety of your vehicle may be impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
The on-board computer only shows messages or warnings from certain systems in the multifunc-tion display. You should therefore make sure
your vehicle is operating safely at all times.
If the operating safety of your vehicle is
impaired, park the vehicle safely as soon as pos- sible. Contact a qualified specialist workshop.
For an overview; see the instrument cluster illus-
tration (Y page 31). Displays and operation
Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated (Y page 163):
The segments light up from the stored speed to the type-tested maximum speed.
R Variable SPEEDTRONIC activated
(Y page 165): The segments light up from the start of the
scale to the selected limit speed.
R DISTRONIC PLUS activated (Y page 168):
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 vehi-
cle in front and the stored speed light up. Rev counter
! Do not drive in the overrevving range. Doing
so will damage the engine.
The red band in the rev counter indicates the
engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached. Outside temperature display
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
Bear in mind that the outside temperature dis-
play indicates the measured air temperature
and not the road surface temperature.
The outside temperature display is in the multi-
function display (Y page 215).
The multifunction display shows changes in the
outside temperature with a delay. Coolant temperature gauge
G
WARNING
If you open the bonnet while the engine is
overheating or while there is a fire in the
engine compartment, you could come into
contact with hot gases or other leaking ser-
vice products. There is a danger of injury.
Allow an overheating engine to cool down
before opening the bonnet. If there is a fire in the engine compartment, leave the bonnet
closed and notify the fire brigade.
The coolant temperature gauge is in the instru-
ment cluster on the left-hand side (Y page 31). Displays and operation
213On-board computer and displays Z

Back button
% Press briefly:
R Back
R Switches off voice-operated con-
trol for navigation or LINGUA-
TRONIC
R Hides display messages or calls up
the last Trip Tripmenu function used
R Exits the telephone book/redial
memory % Press and hold:
R
Calls up the standard display in the
Trip
Trip menu Multifunction display
:
Text field
; Menu bar
= Drive program
? Transmission position
A Permanent display: outside temperature or
speed
X To display menu bar ;:press the =
or ; button on the steering wheel.
If you do not press the buttons any longer,
menu bar ;is faded out after a few seconds.
Text field :shows the selected menu or sub-
menu as well as display messages.
Possible displays in the multifunction dis-
play:
R ZGearshift recommendation for manual
transmission (Y page 147) or for automatic
transmission (shifting manually)
(Y page 151)
R j Active Parking Assist (Y page 183)
R ¯ Cruise control (Y page 163) R
È SPEEDTRONIC (Y page 165)
R _ Adaptive Highbeam Assist Plus
(Y page 117)
R ¤ ECO start/stop function (Y page 142)
R ë HOLD function (Y page 177)
R 120 km/h! 120 km/h! Maximum permissible speed
exceeded (only for certain countries) Menus and submenus
Menu overview
Press the =or; button on the steering
wheel to call up the menu bar and select a menu.
Operating the on-board computer (Y page 214).
Depending on the equipment fitted in the vehi-
cle, you can call up the following menus:
R Trip Trip menu (Y page 215)
R Navi
Navi menu (navigation instructions)
(Y page 217)
R Audio
Audio menu (Y page 218)
R Tel
Tel menu (telephone) (Y page 219)
R Assist.
Assist. menu (assistance) (Y page 220)
R Serv.
Serv. menu (Y page 222)
R Settings
Settings menu (settings) (Y page 223)
The displays are dependent on the multimedia
system. This is why the displays for the Audio Audio,
Navi
Navi andTel
Tel menus may differ slightly to those
in your vehicle. Trip menu
Standard display X
Press and hold the %button on the steer-
ing wheel until the Trip
Tripmenu with trip
meter :and total distance recorder ;
appears. Menus and submenus
215On-board computer and displays Z

The assistance graphic shows you the status
and further information on the following driv-
ing systems or driving safety systems:
R Traffic Sign Assist (Y page 197)
R DISTRONIC PLUS (Y page 168)
R PRE-SAFE ®
Brake (Y page 69)
R COLLISION PREVENTION ASSIST PLUS
(Y page 64)
R ATTENTION ASSIST (Y page 196)
R Lane Keeping Assist (Y page 202)
R Active Lane Keeping Assist (Y page 206)
X Press :to display the ATTENTION ASSIST
assessment.
Traffic Sign Assist You can activate or deactivate the warning func-
tion of Traffic Sign Assist in the Traffic
Traffic Sign Sign
Assist
Assist menu. When the message function is
activated, detected traffic signs and information appear in the multifunction display for five sec-
onds.
X Press the =or; button on the steering
wheel to select the Assist.
Assist.menu.
X Using 9or:, select Traffic Sign
Traffic Sign
Assist
Assist.
X Press ato confirm.
The current selection appears.
X To activate/deactivate the message func-
tion: press aagain.
Further information about Traffic Sign Assist
(Y page 197).
Deactivating/activating ESP ®i
Observe the important safety notes on ESP ®
(Y page 67). G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following.
It may be best to deactivate ESP ®
in the follow-
ing situations:
R when using snow chains
R in deep snow
R on sand or gravel For further information about ESP
®
, see
(Y page 67).
X Start the engine.
X Press the =or; button on the steering
wheel to select the Assist.
Assist. menu.
X Press 9or: to select ESP ESP.
X Press ato confirm.
The current selection appears.
X To activate/deactivate: pressaagain.
ESP ®
is deactivated if the åwarning lamp in
the instrument cluster lights up continuously
when the engine is running.
If the ÷ warning lamp and the åwarning
lamp are lit continuously, ESP ®
is not available
due to a malfunction.
Observe the information on warning lamps
(Y page 256).
Observe the information on display messages
(Y page 230).
Activating/deactivating PRE-SAFE ®
Brake PRE
‑SAFE ®
Brake is only available for vehicles
with the Driving Assistance package.
X Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select PRE-
PRE-
SAFE Brake
SAFE Brake.
X Press ato confirm.
The current selection appears.
X To activate/deactivate: press theabut-
ton again.
When PRE-SAFE ®
Brake is deactivated, the
assistance graphic shows the æsymbol in
the multifunction display.
For more information on PRE ‑SAFE®
Brake, see
(Y page 69).
Activating/deactivating COLLISION
PREVENTION ASSIST PLUS X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select Col‐
Col‐
lision Prevent.
lision Prevent.. Menus and submenus
221On-board computer and displays Z

R
Checking the tyre pressure electronically
(Y page 326)
R Calling up the service due date
(Y page 294) Settings menu
Introduction Depending on the equipment fitted in the vehi-
cle, In the
Settings Settings menu you have the follow-
ing options:
R Changing the instrument cluster settings
(Y page 223)
R Changing the light settings (Y page 223)
R Changing the vehicle settings (Y page 225)
R Changing the heating settings (Y page 226)
R Changing the convenience settings
(Y page 227)
R Restoring the factory settings (Y page 228)
Instrument cluster Selecting the distance unit
The Display unit Speed-/odometer:
Display unit Speed-/odometer: func-
tion allows you to choose whether certain dis-
plays appear in kilometres or miles in the mul-
tifunction display.
X Press the =or; button on the steering
wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Instrument cluster
Instrument cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Display unit Speed-/odometer
Display unit Speed-/odometer function.
You will see the selected setting: km
kmormiles
miles.
X Press the abutton to save the setting.
The selected unit of measurement for distance
applies to the: R the digital speedometer in the Trip
Trip menu
R the total distance recorder and trip meter
R the trip computer
R the current consumption and the range
R the navigation instructions in the Navi
Navi menu
R cruise control
R SPEEDTRONIC
R DISTRONIC PLUS
R ASSYST PLUS service interval display Switching the additional speedometer
on/off
Vehicles for the United Kingdom: this function is unavailable.
Only vehicles with manual transmission have
this function.
If the additional speedometer is switched on,
the speed is shown in the status bar of the mul-tifunction display instead of the outside tem-
perature.
The speed display is inverse to your speedome-
ter.
X Press the =or; button on the steering
wheel to select the Sett.
Sett. menu.
X Press the :or9 button to select the
Instrument cluster Instrument cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Dig. speedo [mph]:
Dig. speedo [mph]: orDig. speedo
Dig. speedo
[km/h]:
[km/h]: function.
You will see the selected setting: on
on oroff
off .
X Press the abutton to save the setting.
Selecting permanent display
Vehicles for the United Kingdom: this function is unavailable.
The Permanent display: Permanent display: function allows you
to choose whether the multifunction display
always shows the outside temperature or the
speed.
The speed display is inverse to your speedome-
ter.
X Press the =or; button on the steering
wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Instrument cluster
Instrument cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Permanent display:
Permanent display: function.
The current setting, outside temperature
outside temperature
or Addit. speedo [mph]:
Addit. speedo [mph]: , appears.
X Press the abutton to save the setting.
Lights Setting the brightness for the instrument
cluster lighting and switches
The lighting in the instrument cluster, in the dis- plays and the controls in the vehicle interior can Menus and submenus
223On-board computer and displays Z

be adjusted with the
Brightness Display/
Brightness Display/
switches:
switches: function.
X Press the =or; button on the steering
wheel to select the Settings
Settings menu.
X Press the :or9 button to select the
Lights
Lights submenu.
X Press ato confirm.
X Press the :or9 button to select the
Brightness Display/switches:
Brightness Display/switches: function.
The current setting appears.
X Press ato confirm.
X Press the :or9 button to adjust the
brightness to any level from Level 1
Level 1 to
Level 5
Level 5 (bright).
X Press the aor% button to save the
setting.
If the light switch is set to the Ã,Tor
L position, the brightness is dependent
upon the brightness of the ambient light.
i The light sensor in the instrument cluster
automatically controls the brightness of the
multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated.
Switching the daytime driving lights
on/off
X Press the =or; button on the steering
wheel to select the Settings
Settings menu.
X Press the :or9 button to select the
Lights
Lights submenu.
X Press ato confirm.
X Press the :or9 button to select the
Day lights
Day lights function.
If the Day Daylights
lights function has been switched
on, the cone of light and the Wsymbol in
the multifunction display are shown in
orange.
X Press the abutton to save the setting.
Further information on daytime driving lights
(Y page 114).
Switching the Intelligent Light System
on/off
X Press the =or; button on the steering
wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Lights Lights submenu.
X Press ato confirm. X
Press the :or9 button to select the
Intell. Light System
Intell. Light System function.
If the Intell. Light Sys. Intell. Light Sys. function has
been switched on, the cone of light and the
L symbol in the multifunction display are
shown in orange.
X Press the abutton to save the setting.
When you switch the Intell. Light Sys. Intell. Light Sys.
function on, you activate the following func-
tions:
R Motorway mode
R Active light function
R Cornering light function
R Extended range foglamps
If you set the dipped-beam headlamps for driv-
ing on the right/left, the multifunction display
shows the Intell. Light System: system
Intell. Light System: system
inoperative Inactive for left-side inoperative Inactive for left-side
traffic traffic orIntell.
Intell. Light
LightSystem:
System: system
system
inoperative Inactive for right-side
inoperative Inactive for right-side
traffic traffic display message instead of the
Intell.
Intell. Light
LightSystem
System function in the Lights
Lights
submenu (Y page 224). This display message
will only appear if the setting for driving on the
left/right is set opposite to your vehicle's coun-
try version.
Observe the additional information on the Intel-
ligent Light System (Y page 116).
Setting the dipped-beam headlamps for
driving on the left/right
This function is only available in vehicles with
the Intelligent Light System.
You can use this function to switch between
symmetrical and asymmetrical dipped beam
(Y page 114).
X Press the =or; button on the steering
wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Lights
Lights submenu.
X Press ato confirm.
X Press the :or9 button to select the
Dipped beams Setting for:
Dipped beams Setting for: function.
You will see the selected setting: Right-
Right-
side traffic
side traffic orLeft-side traffic
Left-side traffic.
X Press the abutton to save the setting.
If you change the setting, conversion does not
take place until the next time the vehicle is
stationary.
If you set the dipped-beam headlamps for driv-
ing on the right/left, then motorway mode and 224
Menus and submenusOn-board computer and displays

the extended range foglamps are unavailable.
These are only deactivated if the setting for driv-
ing on the left/right is set opposite to your vehi- cle's country version.
A qualified specialist workshop can set the
dipped-beam headlamps for driving on the left/
right.
Activating/deactivating the surround
lighting and exterior lighting delayed
switch-off
X Press the =or; button on the steering
wheel to select the Settings
Settings menu.
X Press the :or9 button to select the
Lights Lights submenu.
X Press ato confirm.
X Using :or9, select the Surround
Surround
lighting
lighting function.
If the Surround
Surround lighting
lightingfunction is activa-
ted, the light cone and the area around the
vehicle are displayed in orange in the multi-
function display.
X Press the abutton to save the setting.
Deactivating delayed switch-off of the exterior
lighting temporarily:
X Before leaving the vehicle, turn the key to
position 0in the ignition lock.
X Turn the key to position 2in the ignition lock.
The exterior lighting delayed switch-off is
deactivated.
Delayed switch-off of the exterior lighting is
reactivated the next time you start the engine.
If you have activated the Surround lighting
Surround lighting
function and the light switch is set to the Ã
position, the following functions are activated
when it is dark:
R surround lighting: the exterior lighting
remains lit for 40 second s after unlocking
with the key. If you start the engine, the sur-
round lighting is switched off and automatic
headlamp mode is activated (Y page 114).
R exterior lighting delayed switch-off: the
exterior lighting remains lit for 60 seconds
after the engine is switched off. If you close all
the doors and the boot lid, the exterior lighting
goes off after 15 seconds.
i Depending on your vehicle's equipment,
when the surround lighting and delayed
switch-off exterior lighting are on, the follow- ing light up: R
Side lamps
R Surround lighting in the exterior mirrors
Activating/deactivating the interior light-
ing delayed switch-off
If you activate the Lighting
Lighting delayed delayedsw.-off
sw.-off
function, the interior lighting remains on for
20 seconds after you remove the key from the
ignition lock.
X Press the =or; button on the steering
wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Lights
Lights submenu.
X Press ato confirm.
X Press the :or9 button to select the
Lighting delayed sw.-off
Lighting delayed sw.-off function.
When the Lighting
Lighting delayed
delayedsw.-off
sw.-offfunc-
tion is activated, the vehicle interior is dis-
played in orange in the multifunction display.
X Press the abutton to save the setting.
Vehicle Setting permanent SPEEDTRONIC
X Press the =or; button on the steering
wheel to select the Settings Settingsmenu.
X Press the :or9 button to select the
Vehicle
Vehicle submenu.
X Press ato confirm.
X Press :or9 to select the Limit
Limit
speed (winter tyres):
speed (winter tyres): function.
The current setting appears.
X Press ato confirm.
X Press the :or9 button to adjust per-
manent SPEEDTRONIC in increments of ten
(240 km/h 240 km/h to160 km/h
160 km/h). The Off
Offsetting
switches permanent SPEEDTRONIC off.
X Press the abutton to store the entry.
Observe the additional information on perma-
nent SPEEDTRONIC (Y page 168).
Activating/deactivating the automatic
locking feature
X Press the =or; button on the steering
wheel to select the Settings
Settings menu.
X Press the :or9 button to select the
Vehicle Vehicle submenu.
X Press ato confirm. Menus and submenus
225On-board computer and displays Z