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 251). 222
Indicator and warning lamps in the instrument clusterOn-board computer and displays
Problem
Possible causes/consequences and
0050
0050Solutions 00B2
The yellow
engine oil level
warning lamp
flashes and the
warning buzzer
sounds after the
engine is started
or while the vehi-
cle is in motion. On vehicles with a diesel engine, the oil level display additionally
appears in the display, e.g.
– 2.0 qts – 2.0 qts(Canada:– 2.0 ltr
– 2.0 ltr).
There is not enough or no oil in the engine.
There is a danger of engine damage.
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the oil level with the oil dipstick (Y page 251).
X If the engine oil level is correct: have the malfunction rectified
immediately at a qualified specialist workshop.
X If the engine oil level is too low: have the vehicle towed to a
qualified specialist workshop. 00B2
The yellow
engine oil level
warning lamp
lights up and the
warning buzzer
sounds after the
engine is started
or while the vehi-
cle is in motion. The engine oil level is above the maximum level.
There is a risk of damaging the engine or catalytic converter.
X Check the oil level with the oil dipstick (Y page 251).
X If the oil level is too high: have the engine oil extracted as soon
as possible at a qualified specialist workshop.
X If the oil level is correct: have the malfunction rectified as soon
as possible at a qualified specialist workshop. 00B2
On vehicles with
a diesel engine,
the yellow
engine oil level
warning lamp
lights up repeat-
edly during the
journey. There is a malfunction in the engine oil level display.
X Have the vehicle checked immediately at a qualified specialist
workshop. 003F
The yellow cool-
ant level warning
lamp lights up
while the engine
is running. The coolant level is too low.
Never run the engine if the coolant level is too low. The engine
could overheat and be damaged.
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Switch off the engine and let it cool down.
X Add coolant and be sure to observe the warning notes
(Y page 253).
X If you need to add coolant frequently, have the engine cooling
system checked at a qualified specialist workshop. Indicator and warning lamps in the instrument cluster
223On-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
Check Engine
indicator lamp is
lit up or flashes
while the engine
is running. 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 145).
X Bleed the fuel system (Y page 141).
X Start the engine three to four times in succession after refueling.
Emergency running mode will be canceled. The vehicle does notneed to be checked. 00B9
The yellow
Check Engine
indicator lamp is
lit up or flashes
while the engine
is running. 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. 224
Indicator and warning lamps in the instrument clusterOn-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
Problem
Possible causes/consequences and
0050
0050Solutions 0077
The yellow tire
pressure moni-
tor warning lamp
comes on. G
WARNING
The tire pressure monitor indicates a rapid or severe loss of pres- sure in at least one tire.
X Stop the vehicle without making any extreme steering maneu-
vers or braking suddenly. Pay attention to the traffic conditions
while doing so.
X Check the tires and correct the tire pressure. If a tire continues
to lose pressure, it must be replaced. Replace damaged tires
immediately.
The warning light will go out after the flat tire has been rectified
and you have been driving for a few minutes.
X Vehicles with steering wheel buttons: also observe the mes-
sages in the display (Y page 197).0077
US vehicles
only:
The yellow tire
pressure moni-
tor warning lamp
flashes for
60 seconds and
then remains lit. The tire pressure monitor has malfunctioned.
X Have the tire pressure monitor and the wheels checked at a
qualified specialist workshop. 00B8
The yellow water
separator indi-
cator lamp is lit
when the igni-
tion is switched
on. The water that has collected in the water separator of the fuel filter
has reached the maximum level.
X Drain the water separator (Y page 255).00B1
The yellow
washer fluid
level indicator
lamp for the
windshield
washer/head-
lamp cleaning
system is lit
after the engine
is started or
while the vehicle
is in motion. The water level is too low.
X
Add washer fluid (Y page 255).226
Indicator and warning lamps in the instrument clusterOn-board computer and displays
Hood release lever in the driver's footwell
Observe the safety notes when you open the
hood.
X Stop your vehicle as far away from traffic as
possible on level ground.
X Switch off the engine.
X Secure the vehicle to prevent it from rolling
away.
X Pull release handle 0043on the hood.
The hood is released. X
Reach into the gap and push lever 0044on the
hood catch up. X
Swing the hood upwards until support strut
0087 engages and the hood is supported.
Closing the hood G
WARNING
If the hood is unlatched, it could tip forward
during rapid deceleration of the vehicle and
hit persons or objects within its path. There is
a risk of an accident and injury.
Therefore, always make sure that the hood is closed and locked completely before driving
off.
If the hood is not locked and you are already
driving at walking pace:
R the yellow 003Eindicator lamp in the
instrument cluster goes on for vehicles
without steering-wheel buttons.
R the 003E Hood open
Hood open display appears for
vehicles with steering-wheel buttons.
! When you press the support strut back,
make sure that you do not press it against
the detent position and cause it to bend.
! Do not use your hands to push the hood
down. You could damage it otherwise.
X Lift the hood slightly.
X Press support strut 0087towards the back.
X Lower the hood and allow it to fall with
momentum from a height of approximately
1 ft (30 cm).
The hood locks audibly.
X Check that the hood is correctly locked.
If the hood can be raised slightly, it is not
properly engaged. If the hood is not cor-
rectly engaged, open the hood again. Let
the hood fall with a little more momentum. Engine compartment
249Maintenance and care Z
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