lights MERCEDES-BENZ A-CLASS HATCHBACK 2008 Service Manual

Display
messages 219Display messages Possible cause/consequence Possible solution
. Reversing lamp
left
or
Reversing lamp
right Vehicles with lights and visibility pack-
age*: the left-hand or right-hand reversing
light is fa
ulty. X
Change the bulb (Y page 245). N Add 1.0 litreof
engine oil when
next refuelling Vehicles with a diesel engine: the oil level
is too low. X
Check the oil level (Y page 173).
X If necessary, top up the motor oil.
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual. N Engine oil pres-
sure Stop car, turn
eng. off Vehicles with a petrol engine: the engine
oil pressure is too low. There is a risk of
engine damage. X
Stop in accordance with traffic conditions.
X Switch off the engine.
X Check the oil level (Y page 173).
X If necessary, top up the motor oil. N Eng. oil level
Check level Vehicles with a petrol engine: the oil level
is too low. X
Check the oil level (Y page 173).
X If necessary, top up the motor oil.
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual. N Eng. oil level Stop
car, turn eng. off Vehicles with a diesel engine: the oil level
is too low. There is a risk of engine dam-
age. X
Stop in accordance with traffic conditions.
X Switch off the engine.
X Top up the engine oil and check the level
(Y page 173). Practical advice
* optional
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Troubleshooting
222 Troubleshooting
Points to remember
G
Risk of accident and injury
If maintenance work is carried out incorrectl y this can jeopardise the operating safety of your vehicle. You risk losing control of your vehicle
and thereby causing an accident. The safety systems may also no longer be able to protect you or others as they are designed to do.
Always have maintenance work carried out at a qualified specialist workshop which has the necessary specialist knowledge and tools to
carry out the work required.
Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose.
In particular, all work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop. Warning and indicator lamps in switches and buttons
Problem Possible cause/consequence Suggested solutions
One or all of the indicator lamps
in the seat heating* button are
flashing. The seat heating* has
switched itself off automatically. The on-board voltage is too low,
because too many consumers are
switched on. X
Switch off consumers that are not required, e. g. reading lamp or
interior lighting.
Once the battery is sufficiently charged, the seat ventilation* will
switch back on automatically. The indicator lamp in the
2
button on the air-conditioning*/
Thermotronic* control panel
lights up. The cooling system can-
not be switched on. Cooling has been deactivated
due to a malfunction. X
Visit a qualified specialist workshop. Practical advice
* optional
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Troubleshooting
227Problem Possible cause/consequence Suggested solutions
H
The red brake system
warning lamp comes on
while the engine is run-
ning. G
Risk of accident
There is insufficient brake fluid in
the fluid reservoir. X
Pull over and stop the vehicle safely, pa ying attention to road and
traffic conditions. Do not continue driving under any circumstan-
ces.
X Consult a qualified specialist workshop immediately.
X Observe the additional messages in the multi-function display
(Y page 202).
Do not top up the brake fluid. This will not rectify the fault. ±
The yellow engine diagnos-
tics warning lamp lights up
while the engine is run-
ning. Vehicles with a diesel engine: the
fuel tank has been run dry. X
Start the engine three to four times after refuelling.
Emergency running mode is cancelled. The vehicle need not be
checked. ±
The yellow engine diagnos-
tics warning lamp lights up
while the engine is run-
ning. There may be a fault, for example
R
in the engine management
R in the ignition system
R in the exhaust system
R in the ignition system (for vehi-
cles with petrol engines)
The emission limit values may be
exceeded and the engine can run
in emergency mode. X
Have the vehicle checked as soon as possible at a qualified spe-
cialist workshop. Practical advice
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Troubleshooting
228 Problem Possible cause/consequence Suggested solutions
<
The red seat belt warning
lamp lights up for 6 sec-
onds after the engine
starts up 28
. The seat belt warning lamp
reminds the driver and front
passenger to fasten their seat
belts. X
Fasten your seat belt ( Ypage 73). <
After the engine starts, a
warning tone sounds for
up to 6 seconds 28
. G
Risk of injury
The driver's seat belt is not fas-
tened. X
Fasten your seat belt ( Ypage 73).
The warning tone ceases. <
The red seat belt warning
lamp lights up after the
engine starts, as soon as
the driver's door or the
front-passenger door is
closed. G
Risk of injury
The driver or front passenger has
not fastened their seat belt X
Fasten your seat belt ( Ypage 73).
The warning lamp goes out. G
Risk of injury
There are objects on the front-
passenger seat X
Remove the objects from the front-passenger seat and stow them
safely.
The warning lamp goes out. 28
Only for certain countries. Practical advice
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Troubleshooting
229Problem Possible cause/consequence Suggested solutions
<
The red warning lamp
flashes and an intermit-
tent audible warning
sounds. G
Risk of injury
The driver or front passenger has
not fastened their seat belt and
you are driving faster than
25 km/h or have briefly driven
faster than 25 km/h. X
Fasten your seat belt ( Ypage 73).
The warning lamp goes out and the intermittent audible warning
ceases. G
Risk of injury
There are objects on the front-
passenger seat and you are driv-
ing faster than 25 km/h or have
briefly driven faster than
25 km/h. X
Remove the objects from the front-passenger seat and stow them
safely.
The warning lamp goes out and the intermittent audible warning
ceases. The yellow engine diagnostics
warning lamp lights up while the
engine is running. The fuel level has fallen below the
reserve range. X
Refuel at the nearest filling station. Practical advice
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Troubleshooting
236 Parktronic*
Problem Possible cause/consequence Suggested solutions
Onl
y the red segments in the
Parktronic warning display are lit.
You also hear a warning tone for
approximately two seconds.
Parktronic is deactivated after
approximately 20 seconds and
the indicator lamp in the Park-
tronic button lights up. Parktronic has malfunctioned
and has switched itself off. X
If problems persist, have Parktronic checked at a qualified spe-
cialist workshop. Only the red segments in the
Parktronic warning display are lit.
Parktronic is deactivated after
approximately 20 seconds. The Parktronic sensors are dirty
or there is interference. X
Clean the Parktronic sensors (Y page 196).
X Switch the ignition back on. Only the red segments in the
Parktronic warning display are lit.
Parktronic is deactivated after
approximately 20 seconds. The problem may be caused by an
external source of radio or ultra-
sound waves. X
See if Parktronic functions in a different location. Practical advice
* optional
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Changing the batteries
244 Changing the batteries
Notes
It is advisable to have the batteries replaced
at a qualified specialist workshop, e.g. at a
Mercedes-Benz Service Centre. G
Risk of poisoning
Batteries contain toxic and caustic sub-
stances. For this reason, keep batteries
away from children.
If a battery is swallowed, consult a doctor
immediately. H
Environmental note
Do not dispose of batteries with the house-
hold rubbish, as they contain highly toxic
substances.
Take discharged batteries to a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre, or to a special collection
point for old batteries. Key
Checking the batteries X
Press the jork button.
The batteries are in order if the battery
charge indicator lamp lights up briefly.
Changing the batteries You require two CR 2025 3 V cell batteries.
X
Remove the emergency key element from
the key (Y page 241). 1
Emergency key element
2 To release the battery tray
3 To pull out the battery tray
4 Battery tray X
Using emergency key element 1, press
the grey release catch in the opening in the
direction of arrow 2.
Battery tray 4is released.
X Pull battery tray 4out of the key in the
direction of arrow 3. X
Remove old batteries 1from the battery
tray.
X Insert the new batteries underneath con-
tact spring 2with the positive terminal
facing upwards. Use a lint-free cloth to do
so.
X Push the battery tray back into the key
housing until the battery tray engages.
X Check the function of all key buttons on the
vehicle. Practical advice
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Changing the bulbs
246
Front bulbs Bulb Type
1
Additional turn
signal lamp
LEDs
29 2
Parking lamp/
side lamp W 5 W
3
Main-beam
headlamps
30
/
cornering
light* 31 H7 55 W
4
Dipped-beam
headlamps
H7 55 W
30
or
D1S 35 W* 32 5
Turn signal lamp PY 21 W
6
Front foglamps* H11 55 W
33 Rear bulbs
Bulb Type
7
Third brake
lamp
LED
29 8
Licence plate
lamp C 5 W
9
Rear foglamp P 21 W
Tail lamp P 4 W
a
Turn signal lamp PY 21 W
b
Reversing lamp P 21 W
c
Brake lamp P 21 W
Before changing bulbs
You can replace the following bulbs:
R
Dipped-beam headlamps (halogen head-
lamps)
R Main-beam headlamps (halogen head-
lamps) R
Side lamp/parking lamp (halogen head-
lamps)
R Cornering light* (vehicles with bi-xenon
headlamps*)
R Front turn signal lamp
R Brake lamp
R Reversing lamp
R Rear foglamp/tail lamp
R Turn signal lamp (rear)
R Licence plate lamp
Observe the following points:
R Use only the bulb types specified here.
R To prevent a short-circuit, switch off the
lights before changing a bulb.
R Only hold bulbs with a clean, lint-free cloth.
R Do not work with wet or greasy fingers.
R If the new bulb still does not light up, con-
sult a qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
29 LEDs must not be replaced, as they are designed to have an unlimited service life.
30 Vehicles with halogen headlamps.
31 Vehicles with bi-xenon headlamps*
32 Vehicles with xenon headlamps*: always have these bulbs changed at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
33 These bulbs must be replaced at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre. Practical advice
* optional
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Changing the bulbs
247
i
Due to the location of the bulbs in the
front headlamps, it is best to have these
changed at a qualified specialist workshop,
e.g. a Mercedes-Benz Service Centre.
i Have the headlamp setting checked reg-
ularly at a qualified specialist workshop,
e.g. a Mercedes-Benz Service Centre. Changing the front bulbs
Opening/closing the cover in the front
wheel arch X
To open: turn the front wheels inwards.
X Unscrew retaining screw 1.
X Fold the cover down. X
To close: fold the cover upwards.
X Screw in retaining screw 1.
Removing/fitting the washer fluid res-
ervoir You must remove the washer fluid reservoir
from the engine compartment before you can
replace the bulbs in the front left-hand head-
lamp. X
To remove: turn retaining screw 1anti-
clockwise.
X Remove washer fluid reservoir 2from
bracket 3.
X Put washer fluid reservoir 2to one side
and leave the lines and hoses connected.
Make sure that no washer fluid escapes. X
To fit: guide the lower retaining lug into the
rubber grommet on the longitudinal mem-
ber and fit washer fluid reservoir 2into
bracket 3.
X Turn retaining screw 1clockwise.
Replacing the bulbs in the dipped-beam
headlamp (halogen headlamps) X
Switch off the lights.
X Open the cover in the front wheel arch
(Y page 247).
X Open the bonnet.
X Left-hand headlamps: remove the washer
fluid reservoir (Y page 247).
X Press retaining lug :down and remove
housing cover 2.
X Pull connector =from bulb holder 4. Practical advice
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Changing the bulbs
248
X
Turn bulb holder 4anti-clockwise and pull
it out.
X Remove the bulb from bulb holder 4.
X Insert the new bulb into bulb holder 4.
X Insert bulb holder 4and turn it clockwise.
X Attach connector =to bulb holder 4.
X Align the bottom of housing cover 2and
fold it upwards until it engages.
Main-beam headlamps (halogen head-
lamps)/cornering light*(bi-xenon head-
lamps*) X
Switch off the lights.
X Open the cover in the front wheel arch
(Y page 247).
X Open the bonnet. X
Remove the washer fluid reservoir
(Y page 247).
X Press retaining lug 1down and remove
housing cover ;.
X Main-beam headlamps: pull connector =
from the bulb.
X Turn housing cover ?anti-clockwise.
X Remove the bulb.
X Insert the new bulb so that it is flush.
X Turn housing cover ?clockwise.
X Main-beam headlamps: attach connec-
tor =to the bulb.
X Align the bottom of housing cover ;and
fold it upwards until it engages.
Replacing the bulb in the side lamp/
parking lamp (halogen headlamps) X
Switch off the lights.
X Open the cover in the front wheel arch
(Y page 247).
X Open the bonnet.
X Remove the washer fluid reservoir
(Y page 247).
X Press retaining lug :down and remove
housing cover ;.
X Pull out bulb holder =.
X Turn the bulb anti-clockwise, applying
slight pressure, and remove it from bulb
holder =.
X Insert the new bulb into bulb holder =and
turn it clockwise.
X Insert bulb holder =.
X Align the bottom of housing cover ;and
fold it upwards until it engages. Practical advice
* optional
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