Using the steering wheel buttons
X Use the 0080or007F button to select the
TEL
TEL menu.
The display shows the mobile phone opera- tional readiness symbol.
X Press the 0063or0064 button to switch to
the phone book.
The on-board computer reads the phone
book stored on the SIM card or in the
mobile phone. This may take more than a
minute.
When the message is no longer displayed,
reading has ended.
X Press the 0063or0064 button to select the
desired name.
or X To start rapid scrolling: press and hold
the 0063 or0064 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 phone book: press the0076
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 button 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 0063or0064 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 vehiclespeed 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 affec-
ted. This could cause you to lose control of
your vehicle and cause an accident. More-
over, the safety systems may no longer be Display messages
197On-board computer and displays
Z
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.
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,0063or0064 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 198). 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 otherwise
cause an accident by driving an unsafe vehi-
cle.
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 2messages
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 0063or0064 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. You can only remove the key when it
is in the basic position. 198
Display messagesOn-board computer and displays
Problem
Possible causes/consequences and
0050
0050Solutions 00B9
The yellow
Check Engine
indicator lamp is
lit while the
engine is run-
ning. The exhaust gas aftertreatment is malfunctioning or an emission
relevant malfunction has occurred. This malfunction or defect can
damage the exhaust gas aftertreatment.
After the first message and under normal operating conditions,
you can drive on for up to approximately 500 mi (800 km). Then a
warning tone sequence sounds and the engine can only be started another 16 times.
X Observe the messages in the display.
X Have the exhaust gas aftertreatment checked immediately at a
qualified specialist workshop.
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. 0028
If you turn the
key to position 2
in the ignition
lock, the yellow
preglow indica-
tor lamp
remains lit for
approximately
1 minute. Or the
yellow preglow
indicator lamp
lights up for
approximately
1 minute while
the engine is
running. At extremely low temperatures, the engine may not start.
There is a malfunction in the preglow system.
X Have any malfunction rectified at a qualified specialist work-
shop. 009F
The yellow air fil-
ter indicator
lamp is lit while
the engine is
running. The service limit for the air filter has been reached. The air filter is
dirty.
X Have the air filter element replaced as soon as possible at a
qualified specialist workshop. Indicator and warning lamps in the instrument cluster
225On-board computer and displays Z
X
Turn the key to position 2in the ignition
lock.
X Open drain plug 0044immediately until the
water/fuel mixture flows out of drain
hose 0043.
X Screw in drain plug 0044as soon as approx-
imately 0.2 US quarts(0.2 liters) of the
water/fuel mixture have been collected.
The electrical fuel pump automatically halts
the flow of the water/fuel mixture after
30 seconds.
X After draining, turn the key back to posi-
tion 0in the ignition lock.
X Dispose of the collected water/fuel mix-
ture in an environmentally responsible
manner, e.g. at a qualified specialist work-
shop.
X Check drain plug 0044. The drain plug must
be closed.
When the engine is running and drain
hose 0044is open, fuel is lost through drain
hose 0043.
X Close the hood (Y page 249).
If the 00B8 indicator lamp does not go out
after draining:
X Drain the fuel filter again.
X If the 00B8 indicator lamp does not go out
after draining for the second time, have the
cause checked immediately at a qualified
specialist workshop. Vehicle interior
Air filter for the rear-compartment air
conditioning
! Regularly check the air filters for visible
dirt. Clean or replace a dirty filter mat. The
dirt may otherwise lead to damage to the
air-conditioning system. Filter magazine, located on the roof in the rear
compartment
An increased amount of sand or dust may
collect in the air filter of the rear-compart-
ment air conditioning when you drive on dusty
or sandy roads.
X To remove the filter mat: carefully pry
cover 0043out of recesses 0044and remove.
X Remove the filter mat from the air duct.
X To clean the filter mat: wash the dirty fil-
ter mat with clear water.
X Leave the filter mat to dry.
i The filter mat must not be cleaned or dried
in a machine.
X To install the filter mat: insert the filter
mat into the air duct.
X Replace and engage cover 0043. Maintenance
General notes
H
Environmental note
Observe measures to protect the environ-
ment when working on the vehicle. You must
observe the legal requirements when dispos-
ing of service products, e.g. engine oil. This
also includes all components, e.g. filters,
which have come into contact with service
products. Any qualified specialist workshop
can provide information about this.
Dispose of empty containers, cleaning cloths and care products in an environmentally 256
MaintenanceMaintenance and care
If the indicator/warning lamps do not light up
in the instrument cluster when temperatures
are low, it is probably because the discharged
battery has frozen. Should this be the case, do
not jump-start the vehicle or charge the bat-
tery. The service life of a thawed battery may be shorter. Start-up behavior may deterio-
rate, in particular at low temperatures. Have
the thawed battery checked at a qualified
specialist workshop. G
WARNING
During charging and jump-starting, explosive
gases can escape from the battery. There is a risk of an explosion.
Particularly avoid fire, open flames, creating
sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting.
Do not lean over a battery. G
WARNING
Battery acid is caustic. There is a risk of injury. Avoid contact with skin, eyes or clothing. Do
not inhale any battery gases. Do not lean over
the battery. Keep children away from batter-
ies. Wash away battery acid immediately with
plenty of clean water and seek medical atten- tion.
! Only charge the installed battery with a
battery charger that has been tested and
approved by the distributor named on the
inside of the front cover. This device allows the battery to be charged when it is instal-
led in the vehicle. The vehicle's electronics
may otherwise be damaged.
A battery charger unit specially adapted for
Mercedes-Benz vehicles and tested and
approved by Mercedes-Benz is available as an accessory. Only this device permits the
charging of the battery in its installed posi-
tion. Only charge the installed battery with a
battery charger that has been tested and
approved by Mercedes-Benz, using the jump-
start connection point in the engine compart-
ment. Contact an authorized Mercedes-Benz
Center for information and availability. Read the operating instructions for your charger
before charging the battery.
The additional battery can not be charged
from the jump-starting connection point.
Recharge the battery more frequently if you
use the vehicle mainly for short trips and/or
drive at low outside temperatures.
X Charge the battery. Observe the notes in
the operating instructions for your battery
charger.
X If necessary, install battery. Observe the
notes on reconnecting the battery.
i Recharge uninstalled, out of service bat-
teries every three months. This will counter
self-discharging and prevent battery dam-
age. Care
! Dirty battery clamps and battery surfaces
cause leak currents which lead to the bat-
teries discharging.
! Do not use cleaning agents containing
fuel. Cleaning agents containing fuel cor-
rode the battery housing.
! If dirt gets into the battery cell, battery
self-discharge will increase and the battery
may be damaged.
The following points on battery care must be
observed: X Regularly check the battery terminals and
the fastening of the negative cable to the
chassis to ensure that they are firmly
seated.
X Always keep the battery terminals and bat-
tery surfaces clean and dry.
X Lightly grease the undersides of the battery
terminals with acid-resistant grease.
X Only clean the battery casing with a com-
mercially available cleaning product. 264
BatteryMaintenance and care
When parking your vehicle, make sure that
the tires do not get deformed by the curb or
other obstacles. If it is necessary to drive over
curbs, speed humps or similar elevations, try to do so slowly and not at a sharp angle. Oth- erwise, the tires, particularly the sidewalls,
can get damaged. Regular wheel and tire checks
G
WARNING
Damaged tires can cause tire inflation pres-
sure loss. As a result, you could lose control of your vehicle. There is a risk of accident.
Check the tires regularly for signs of damage
and replace any damaged tires immediately.
Check the wheels and tires of your vehicle for damage regularly, i.e. at least every two
weeks, as well as after driving off-road or on
rough roads. Damaged wheels can cause a
loss of tire pressure. Pay particular attention
to damage such as:
R cuts in the tires
R punctures
R tears in the tires
R bulges on tires
R deformation or severe corrosion on wheels
Regularly check the tire tread depth and the
condition of the tread across the whole width of the tire (Y page 285). If necessary, turn the
front wheels to full lock in order to inspect the
inner side of the tire surface.
All wheels must have a valve cap to protect
the valve against dirt and moisture. Do not
install anything onto the valve other than the
standard valve cap or other valve caps
approved for your vehicle by dealers listed on
the inside of the front cover. Do not install any
other valve caps or systems, e.g. tire pressure
monitor systems.
Regularly check the pressure of all the tires,
particularly prior to long trips. Adjust the tire pressure if necessary (Y page 288).The service life of tires depends on various
factors, including the following:
R driving style
R tire pressure
R mileage Tire tread
G
WARNING
Insufficient tire tread will reduce tire traction.
The tire is no longer able to dissipate water.
This means that on wet road surfaces, the risk of hydroplaning increases, in particular where speed is not adapted to suit the driving con-
ditions. There is a risk of accident.
If the tire pressure is too high or too low, tires
may exhibit different levels of wear at differ-
ent locations on the tire tread. Thus, you
should regularly check the tread depth and
the condition of the tread across the entire
width of all tires.
Minimum tire tread depth for:
R Summer tires: 00CEin (3 mm)
R M+S tires: 00CFin (4 mm)
For safety reasons, replace the tires before
the legally prescribed limit for the minimum
tire tread depth is reached. Marker
0043shows the location where the bar
indicator (arrow) for tread wear is integrated
into the tire tread.
Tread wear indicators (TWIs) are required by
law. Six indicators are positioned over the tire
tread. They are visible once the tread depth is Operation
285Wheels and tires Z