Page 227 of 409

Saloon
Estate
X
To open the cover (Saloon): push down
luggage net ;.
X Turn handle :anti-clockwise and fold
dow ncover =.
X To open the cover (Estate): pull han-
dle :in the direction of the arrow and fold
down cover ;. X
Grip release wheel ;so that your thumb
lies on the thumb rest.
X Turn release wheel ;anti-clockwise until
the ball coupling releases and folds out from under the rear bumper. Indicator
lamp
:flashes. X
Pull the ball coupling in the direction of the
arrow until it engages in a vertical position.
Indicator lamp :goes out.
The multifunction display shows the
Check trailer hitch lock message
until the ball coupling is engaged.
X Remove the protective covering from the
ball coupling and store it in a safe place.
X Make sure that the ball of the ball coupling
is clean and that it is either greased or dry
(grease free), depending on the instruc-
tions for the trailer.
The power socket is integrated in the ball
coupling. Coupling up a trailer
G
WARNING
Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your hand could
become trapped between the bumper and
trailer drawbar.
X Make sure that the transmission is in posi-
tion P.
X Apply the parking brake.
X Position the trailer level behind the vehicle.
X Couple up the trailer. 224
Towing
atrailerDriving an d parking
Page 229 of 409

X
Grasp release wheel ;with your hand
such that the thumb is in the thumb rest
and turn it anti-clockwise.
The ball coupling unlocks and lowers. Indi-
cator lamp :flashes. X
Press the ball coupling in the direction of
the arrow until it engages behind the
bumper.
Indicato rlamp :goes out and the mes-
sage in the multifunction display disap-
pears. Trailer power supply
When it leaves the factory, your vehicle's
trailer socke tis 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. !
You can connect accessories with a
power rating of up to 240 W to the perma-
nent power supply and with a power rating
of up to 180 W to the power supply that is
switched on via the ignition lock.
The trailer battery may not be charged from
the power supply.
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 abouti nstal-
ling the trailer electrics at a qualified special-
is tw orkshop.
X To switch the connected power supply
on or off: turn the key in the ignition lock
to position 2or 0respectively. Bulb failure indicator for LED lamps
i If LED lamps are fitted in the trailer, an
error 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 operation of the bulb failure
indicator, each LED chain in the trailer lighting
must be guaranteed a minimum current of
50 mA. Trailer with 7-pin connector
General notes If your trailer has a 7-pin connector, you can
connect it to the 13-pin socket on the ball
coupling using an adapter or, if necessary, an
adapter cable. Both can be obtained in a
qualified specialist workshop.226
Towing
atrailerDriving an d parking
Page 232 of 409
Useful information
............................230
Important safety notes ....................230
Displays and operation ....................230
Menus and submenus ......................234
Display messages ............................. 253
Warning and indicator lamps in the
instrument cluster ............................280 229On-board computer and displays
Page 233 of 409

Useful information
i This Owner's Manual describes all models
and all standard and optional equipment
available to your vehicle at the time of pub-
lication of the Owner's Manual. Country-
specific deviations are possible. Please
note that your vehicle may not be equipped
with all features described. This also
applies to safety-relevan tsystems and
functions.
i Please read the information on qualified
specialist workshops (Y page 25).Important safety notes
You will find an illustration of the instrument
cluster in the "At a glance" section
(Y page 30). G
WARNING
Only use the on-board computer when road
and traffic conditions permit .You would oth-
erwise be distracted and unable to concen-
trate properly on driving, and could cause an
accident. G
WARNING
No messages will be displayed if either the
instrument cluster or the multifunction dis-
play is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such as
speed, outside temperature, warning and indi-
cator lamps, display messages or system fail-
ures. Driving characteristics may be impaired.
Adjust your driving style and vehicle speed
accordingly.
Contact a qualified specialist workshop
immediately. G
WARNING
The on-board computer only records and dis-
plays malfunctions and warnings from certain
systems. For this reason, you should always make sure that your vehicle is safe to use. You
could otherwise cause an accident by driving
an unsafe vehicle.
G
WARNING
The operating safety of your vehicle could be
impaired if maintenance work is carried out
incorrectly. This could cause you to lose con-
trol of your vehicle and cause an accident.
Moreover, the safety systems may no longer
be able to protect you or others as they are
designed to do.
Always have service work carried out at a
qualified specialist workshop. Displays and operation
Coolant temperature gauge
The coolant temperature gauge is in the
instrument cluster on the right-hand side.
The reading may rise up to 120 †undernor-
mal driving conditions if the coolant has been
filled correctly.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale. Rev counter
The red band in the rev counter indicates the
engine's overrevving range.
! Do not drive in the overrevving range.
Doing so will damage the engine.
The fuel supply is interrupted to protec tthe
engine when the red band is reached. Outside temperature display
The outside temperature displayi s in the mul-
tifunction display (Y page 232). G
WARNING
At temperatures just above freezing point, the
street may be icy, especially in wooded areas 230
Displays and operationOn-board computer and displays
Page 234 of 409

or on bridges. If you do not adapt your driving
style to the conditions, the vehicle could skid.
For this reason, adapt your driving style and
speed to the weather conditions.
Changes in the outside temperature are dis-
played after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
Cruise control (Y page 181) activated:
The segments light up from the stored speed
to the maximum speed.
Variable SPEEDTRONIC (Y page 183) activa-
ted:
The segments light up from the start of the
scale to the selected limit speed.
DISTRONIC PLUS (Y page 185) activated:
One or two segments in the set speed range
light up.
DISTRONIC PLUS detects a vehicle in front:
The segments between the speed of the vehi-
cle in front and the stored speed light up. Operating the on-board computer
Overview The on-board computer is activated as soon
as you turn the key to position 1in the ignition
lock.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel. :
Multifunction display
; Right control panel
= Switches on LINGUATRONIC; see the sep-
arate operating instructions
? Back button
A Left control panel
Left control panel =
; R
Calls up the menu and menu bar 9
:
Press briefly:
R
Scrolls through lists
R Selects a submenu or function
R In the Audio menu: selects a
stored station, an audio track or
a video scene
R In the Tel (telephone) menu:
switches to the phone book and
selects a name or telephone
number Displays and operation
231On-board computer and displays Z
Page 235 of 409

9
:
Press and hold:
R
In the Audio menu: selects the
previous/next station or selects
an audio track or a video scene
using rapid scrolling
R In the Tel (telephone) menu:
starts rapid scrolling through the
phone book a R
Confirms selection/display mes-
sage
R In the Tel (telephone) menu:
switches to the telephone book
and starts dialling the selected
number
R In the Audio menu: stops the
station search function at the
desired station Right control panel
~ R
Rejects or ends a call
R Exits telephone book/redial
memory 6 R
Makes or accepts a call
R Switches to the redial memory W
X R
Adjusts the volume 8 R
Mute Back button
%
Press briefly:
R
Back
R Switches off LINGUATRONIC;
see the separate operating
instructions
R Hides display messages or calls
up the last Trip menu function
used
R Exits the telephone book/redial
memory %
Press and hold:
R
Calls up the standard display in
the Trip menu
Multifunction display
Values and settings as well as display mes-
sages are shown in the multifunction display. Example: DIRECT SELECT automatic transmission
multifunction display
:
Description field
; Menu bar
= Drive program
? Transmission position
A Outside temperature or speed
(Ypage 243)
X To show menu bar ;:press the =
or ; button on the steering wheel.
The indicators in the lower part of the display
differ from those shown here, depending on
the transmission. 232
Displays and operationOn-board computer and displays
Page 236 of 409
The following messages can appear in the
multifunction display:
Z Shift recommendation
(Ypage 164)
XjY Parking Guidance (Y page 203)
è Rear window wiper
(Ypage 133)
_ Adaptive Highbeam Assist
(Ypage 127)
À ATTENTION ASSIST
(Ypage 207)
¤ ECO start/stop function
(Ypage 158)
Ä Speed Limit Assist
(Ypage 208)
à Lane Keeping Assist
(Ypage 214) or Active Lane
Keeping Assist (Y page 218)
ë HOLD function (Y page 194)
Ä PRE-SAFE®
Brake (Y page 75)
120 km/h! Maximum permissible speed
exceeded (only for certain coun-
tries) Displays and operation
233On-board computer and displays Z
Page 237 of 409
Menus and submenus
Menu overview
The number of menus show ndepends on the optional equipment in the vehicle. Function
:
Trip (Y
page 235)menu ;
Navi menu (navigation instructions) (Y
page 236)=
Audio menu (Y
page 237) ?
Tel menu (telephone) (Y
page 239)A
Assist. menu (assistance) (Y
page 240)B
Serv. (Y
page 242)menu
R calls up display messages ( Ypage 253)
R tyre pressure loss warning (Y page 367) or checks the tyre pressure electron-
ically (Y page 368)
R ASSYST PLUS service interval display (Y page 325)C
Settings menu (Y
page 243) D
AMG menu in AMG vehicles (Y
page 249)The
Audio ,
Navi and
Tel menus differ slightly in vehicles with an audio system and in vehicles
with COMAND APS.T he examples given in this Owner's Manual apply to vehicles equipped
with COMAND APS. 234
Menus and submenusOn-board computer and displays