
X
Press the 0041or0068 button to select the
desired name.
Or
X To start rapid scrolling: press and hold
the 0041 or0068 button longer than 1 sec-
ond.
Rapid scrolling stops when you release the
button or reach the end of the list.
Using the steering wheel buttons
X To start dialing: press the0061button.
The on-board computer dials the corre-
sponding phone number.
When a connection is established, the
name of the other person and/or the call
duration appear in the display.
X To exit the telephone book: press the
0076 button.
Redialing The on-board computer saves the last names
or numbers dialed in the redial memory.
Using the steering wheel buttons
X Use the 0080or007F buttons to select the
TEL
TEL menu.
The display shows the mobile phone opera-
tional readiness symbol.
X Press the 0061button.
The display shows the most recently dialed
numbers or names in the redial memory.
X Press the 0041or0068 button to select the
desired name or number.
X To start dialing: press the0061button.
The on-board computer dials the corre-
sponding phone number.
When a connection is established, the
name of the other person and/or the call
duration appear in the display.
Or
X To exit the redial memory: press the
0076 button. Display messages
Notes on display messages
Important safety notes G
WARNING
No information will be displayed if either the
instrument cluster or the display is inopera-
tive.
As a result, you will not be able to see warning
and indicator lamps or information about the
driving conditions, such as speed or outside
temperature. Driving characteristics may be
impaired. Adjust your driving style and vehicle
speed accordingly.
Contact a qualified specialist workshop
immediately. G
WARNING
If service work is not carried out correctly, the
operating safety of your vehicle may be
affected. This could cause you to lose control
of your vehicle and cause an accident. More-
over, 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.
i If you turn the key to position 2in the
ignition, a display check is performed. All
warning/indicator lamps (except the turn
signal indicator lamps) and the display are
activated. Before starting the journey,
check that the warning and indicator lamps
are operating correctly.
Vehicles without steering wheel but-
tons Warnings, malfunctions or additional infor-
mation may also be shown in the display. The
following tables show all the display mes-
sages. A warning tone sounds with certain
display messages. Display messages
199On-board computer and displays Z

Vehicles with steering wheel buttons
The on-board computer shows warnings, mal-
functions or additional information in the dis-
play. A warning tone sounds with certain dis-
play messages. Display messages of a high
priority are shown in red.
Please respond in accordance with the dis-
play messages and follow the additional
notes in this Operator's Manual.
You can hide low-priority display messages by
pressing the 0080,007F,0041or0068 but-
ton on the steering wheel or the 0045reset but-
ton.
You cannot hide display messages of the
highest priority. These messages will con-
tinue to be shown in the display until their
cause has been eliminated.
The on-board computer stores certain display
messages in the message memory
(Y page 200).
The following shows all the messages that
could appear in the display, arranged alpha-
betically. Message memory
The on-board computer only records and
shows malfunctions and warnings from cer-
tain systems. Therefore, make sure that your
vehicle is safe to use. You could cause an
accident by driving an unsafe vehicle.
The on-board computer stores certain display
messages. In the Message memory menu,
you can call up stored display messages.
Using the steering wheel buttons
X Press the 0080or007F button repeatedly
until the number of stored display mes- sages, e.g.
2
2 messages messages, appears in the dis-
play.
If no malfunctions have occurred, the No No
messages
messages message appears.
X Scroll through the stored display messages
with the 0041or0068 button.
X To exit the message memory menu:
press the 0080or007F button.
When you switch off the ignition, all display
messages are deleted from the message
memory. 200
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
0050
0050Solutions 0099
dEF Chk dEF Chk In addition, the yellow
00E2DEF indicator lamp lights up and a
warning tone sounds.
The DEF supply has dropped below 1.5 US gal (5.5 l).
After the message appears for the first time, and under normal
driving conditions, the remaining DEF supply will last for approx-
imately 1000 miles (1600 km).
After that, the 0.8 US gal (3.0 l) reserve mark is reached. A warning
tone sequence sounds and the engine can then only be started
another 16 times.
X add DEF supply (Y page 149).
The 00E2 DEF indicator lamp disappears after no more than
20 seconds after the vehicle has stopped or you have switched
on the ignition or started the engine after refueling. 0099
StArtS RExx StArtS RExx In addition, the yellow
00B9Check Engine indicator lamp and the
yellow 00E2DEF indicator lamp light up and a warning tone
sounds. A warning tone sequence sounds.
After the message appears for the first time, the engine can only
be started another 16 times.
The number of remaining engine starts XX XX(1616 to0
0) is shown in the
message every time the engine is started. When the number of
remaining engine starts is 0 0the engine management prevents the
vehicle being driven at a speed exceeding 5 mph (8 km/h). The
Idle Mode Idle Mode message appears in the multifunction display: The DEF reducing agent is contaminated, diluted or is not compli-
ant with ISO 22241.
X
Have the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible. The exhaust gas aftertreatment is malfunctioning or an emission
relevant malfunction has occurred. This malfunction or defect can
damage the exhaust gas aftertreatment.
X
Visit a qualified specialist workshop immediately. Display
messages
203On-board computer and displays Z

Display messages Possible causes/consequences and
0050
0050Solutions 0099
StArtS IdLE StArtS IdLE In addition, the yellow
00E2DEF indicator lamp lights up and a
warning tone sequence sounds.
The DEF supply has dropped below the 0.8 US gal (3.0 l) reserve
mark.
After the message appears for the first time, the remaining DEF
supply will last for approximately 1000 miles (1600 km). The
engine can then only be started another 16 times.
The number of remaining engine starts XX
XX (1616 to0 0) is shown in the
message every time the engine is started. If the number displayed
is 0 0, the yellow 00B9Check Engine indicator lamp also lights up
and you can only drive the vehicle at a maximum 5 mph
(8 km/h).
X Add at least 2.0 US gal (7.6 l) of DEF (Y page 149).
The 00E2 DEF indicator lamp disappears after no more than
20 seconds after the vehicle has stopped or you have switched
on the ignition or started the engine after refueling. Err Err flashes for 5 seconds, the
00CEindicator lamp also flashes and
then goes out.
Highbeam Assist is deactivated and temporarily not operational
or Highbeam Assist is malfunctioning.
Possible causes are:
R The camera's functionality is impaired due to heavy rain, snow
or fog.
R The windshield is dirty in the camera's field of vision.
X Stop the vehicle paying attention to road and traffic conditions.
X Secure the vehicle to prevent it from rolling away
(Y page 151).
X Clean the windshield (Y page 269), particularly in the camera's
field of vision.
If the 00CE indicator lamp goes out, Highbeam Assist is opera-
tional again.
If the problem persists, visit a qualified specialist workshop. 204
Display
messagesOn-board computer and displays

Lights
Display messages Possible causes/consequences and
0050
0050Solutions 0049
Low beam left Low beam left The left-hand low beam is faulty
3
.
X Halogen headlamps: replace the bulb as soon as possible
(Y page 101).
X Bi-Xenon headlamps: consult a qualified specialist workshop
as soon as possible. 0049
Low beam right Low beam right The right-hand low-beam headlamp is faulty
3
.
X Halogen headlamps: replace the bulb as soon as possible
(Y page 101).
X Bi-Xenon headlamps: consult a qualified specialist workshop
as soon as possible. 0049
Cornering lt. left Cornering lt. left The left-hand cornering light is faulty
3
.
X Replace the bulb as soon as possible (Y page 101).0049
Cornering Cornering
lt.
lt.right
right The right-hand cornering light is faulty
3
.
X Replace the bulb as soon as possible (Y page 101).0049
Lights on automat‐ Lights on automat‐
ical. Remove key ical. Remove key The automatic headlamp feature is active: the light switch is in the
0058
position and you have forgotten to remove the key.
X Remove the key from the ignition lock. 0049
Turn signal left Turn signal left The left-hand turn signal is faulty.
X
Change the bulb as soon as possible in the front ( Ypage 102)
or rear (Y page 103) indicator lamp. 0049
Turn signal right Turn signal right The right-hand turn signal is faulty.
X
Change the bulb as soon as possible in the front ( Ypage 102)
or rear (Y page 103) indicator lamp. 0049
Brake lamp left Brake lamp left The left brake lamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 103).0049
Brake lamp right Brake lamp right The right brake lamp is faulty
3
.
X Replace the bulb as soon as possible (Y page 103).0049
Third brake lamp Third brake lamp The third brake lamp is faulty
3
. This display message will only
appear if all LEDs have failed.
X Consult a qualified specialized workshop as soon as possible. 3
Depending on the equipment, the bulb-failure indicator may not be featured for any lamps other than the
turn signals. 210
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
0050
0050Solutions 00E2
XX XX
starts
starts remaining
remaining The Diesel Exhaust Fluid (DEF) supply has dropped below the
0.8 US gal (3.0 l) reserve mark.
After the message appears for the first time, the remaining DEF
supply will last for approximately 1000 miles (1600 km). The
engine can then only be started another 16 times.
The number of remaining engine starts
XX XX(1616 to0
0) is shown in the
message every time the engine is started. If the number displayed
is 0 0, the yellow 00B9Check Engine indicator lamp also lights up
and you can only drive the vehicle at a maximum 5 mph
(8 km/h).
X Add at least 2.0 US gal (7.6 l) of DEF (Y page 149).
The display message disappears no more than 20 seconds after
the vehicle has stopped or you have switched on the ignition or
started the engine after refueling. 00E2
Idle Mode Idle Mode In addition, the yellow
00B9Check Engine indicator lamp lights
up.
The vehicle cannot be driven at a speed exceeding 5 mph
(8 km/h). The DEF reducing agent is contaminated, diluted or is not compli-
ant with ISO 22241.
X
Have the DEF tank cleaned and refilled at a qualified specialist
workshop immediately. The exhaust gas aftertreatment is malfunctioning or an emission
relevant malfunction has occurred. This malfunction or defect can
damage the exhaust gas aftertreatment.
X
Visit a qualified specialist workshop immediately. 00AC
Coolant Coolant
Stop,
Stop,turn
turn
engine off
engine off The coolant temperature is too high.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Consult a qualified specialist workshop. 00AC
Coolant Coolant
Stop,
Stop,turn
turn
engine off
engine off The coolant temperature is too high.
If the vehicle is stopped after being subjected to extreme loads,
the coolant warning lamp may come on when the ignition is
switched on or the engine is restarted. Such loads can be, for
example, driving in mountainous terrain or driving with a trailer.
X
Run the engine for approximately 1 minute at idling speed.
X Consult a qualified specialist workshop if the display message
continues to be shown. 214
Display
messagesOn-board computer and displays

Problem Possible causes/consequences and
0050
0050Solutions 0075
The red warning
lamp does not
go out approx-
imately
4 seconds after
the ignition is
switched on, or
it lights up again. The restraint systems have malfunctioned.
G WARNING
If the restraint systems are malfunctioning, individual systems
could be triggered inadvertently or might not be triggered at all in
the event of an accident.
There is an increased risk of injury and accidents.
X Drive on with care.
X Visit a qualified specialist workshop immediately. 003D
The red battery
indicator lamp is
lit while the
engine is run-
ning. The battery is not being charged. Possible causes are a defective
alternator or a torn poly-V-belt.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the poly-V-belt.
X If the poly-V-belt is torn: do not continue driving. Consult the
nearest qualified specialist workshop.
X If the poly-V-belt is not damaged: have the vehicle checked as
soon as possible by a qualified specialist workshop. 003D
The red battery
indicator lamp is
lit while the
engine is run-
ning. The battery is faulty.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Do not continue driving under any circumstances.
X Consult a qualified specialist workshop. 0026
The yellow brake
pad wear indica-
tor lamp is lit
after the engine
is started or
while the vehicle
is in motion. The brake pads/linings have reached their wear limit.
G WARNING
Braking performance can be impaired.
There is a risk of an accident.
X Have the brake pads/linings replaced as soon as possible at a
qualified specialist workshop. 00B2
The yellow
engine oil level
warning lamp is
lit after the
engine is started
or while the vehi-
cle is in motion. The oil level has dropped to the minimum level.
X
Check the engine for oil loss.
X If oil loss is detected: consult a qualified specialist workshop
immediately.
X If no oil loss is detected: check the oil level and add engine oil
(Y page 253). Indicator and warning lamps in the instrument cluster
225On-board computer and displays Z

Problem Possible causes/consequences and
0050
0050Solutions 00AC
The red coolant
warning lamp is
lit while the
engine is run-
ning. The coolant temperature is too high.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Consult a qualified specialist workshop. 00AC
The red coolant
warning lamp is
lit while the
engine is run-
ning. The coolant temperature is too high.
If the vehicle is stopped after being subjected to extreme loads,
the coolant warning lamp may come on when the ignition is
switched on or the engine is restarted. Such loads can be, for
example, driving in mountainous terrain or driving with a trailer.
X
Run the engine for approximately 1 minute at idling speed.
X Consult a qualified specialist workshop if the display message
continues to be shown. 00B5
0077
The yellow
reserve fuel
warning lamp is
on. At the same
time,
0 0, appears
in the fuel tank
content display
while the engine
is running,
although there is
fuel in the fuel
tank. The fuel filler cap is not closed.
X
Close the fuel filler cap.
You will hear a click when the fuel filler cap is closed fully.
X If the malfunction continues to be displayed, have it rectified
immediately at a qualified specialist workshop. 00B9
The yellow
engine diagnos-
tic indicator
lamp is lit up or
flashes while the
engine is run-
ning. You have used up all fuel in the tank.
The engine is running in emergency mode.
X
Refuel at the nearest gas station (Y page 148).
X Bleed the fuel system (Y page 143).
X Start the engine three to four times in succession after refueling.
Emergency running mode will be canceled. The vehicle does not
need to be checked. 00B9
The yellow
engine diagnos-
tic indicator
lamp is lit up or
flashes while the
engine is run-
ning. The injection control is malfunctioning.
The engine is running in emergency mode.
Engine power output may be reduced.
X
Have the vehicle checked at a qualified specialist workshop as
soon as possible.
In some states it is legally prescribed that after the check engine
indicator lamp lights up you must contact a qualified specialist
workshop immediately. Observe the legal requirements. Indicator and warning lamps in the instrument cluster
227On-board computer and displays Z