brake MERCEDES-BENZ A-CLASS HATCHBACK 2008 Workshop Manual

Display
messages 213Display messages Possible cause/consequence Possible solution
D The engine fan is fa
ulty. X
If the coolant temperature is less than 120 †,
you can continue driving to the nearest quali-
fied specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g.
driving in mountainous terrain, and stop-and-
go driving. # The battery is not being charged. One (or
more) of the following could be the cause:
R
a faulty alternator
R a torn poly-V-belt
R a malfunction in the electronics X
Stop immediately and safely when traffic con-
ditions permit and switch off the engine.
X Check the poly-V-belt.
X If the poly-V-belt is torn: do not continue
driving. Consult a qualified specialist work-
shop.
X If the poly-V-belt is not damaged: have the
vehicle checked immediately at a qualified spe-
cialist workshop. The on-board voltage is too high. X
Have the alternator checked at a qualified spe-
cialist workshop. 2 Brake wear The brake pads/linings have reached
their wear limit. X
Visit a qualified specialist workshop. Practical advice
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Display
messages 214 Display messages Possible cause/consequence Possible solution
3 Check brake fluid
level
G
Risk of accident
There is insufficient brake fl uid in the
brake fluid reservoir. X
Pull over and stop the vehicle safely, paying
attention to road and traffic conditions. Do not
continue driving under any circumstances.
X Consult a qualified specialist workshop.
X Do not top up the brake fluid. This will not rec-
tify the fault. ! Release parking
brake You are driving with the parking brake
applied. X
Release the parking brake. [ Clean fuel filter There is water in the fuel filter. The water
must be drained off
27
. X
Visit a qualified specialist workshop. D Coolant Stop car,
turn eng. off The coolant is too hot. X
Pull over and stop the vehicle safely and switch
off the engine, paying attention to road and
traffic conditions.
X Make sure, that the air supply to the radiator
is not blocked, e.g. by slush.
X Restart the engine only when the display mes-
sage disappears. Otherwise, there is a risk of
engine damage.
X Pay attention to the coolant temperature dis-
play.
X If the temperature increases again, visit a quali-
fied specialist workshop immediately. 27
Only for certain countries. Practical advice
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Display
messages 217Display messages Possible cause/consequence Possible solution
. Turn signal rear
left
or
Turn signal rear
right The rear left-hand or rear right-hand turn
signal is fa
ulty. X
Change the bulb (Y page 245). . Turn signal left
mirror
or
Turn signal right
mirror The turn signal in the left-hand or right-
hand exterior mirror is faulty. This display
message will only appear if all LEDs are
faulty. X
Visit a qualified specialist workshop. . Turn signal front
left
or
Turn signal front
right The front left-hand or front right-hand turn
signal is faulty. X
Change the bulb (Y page 245). . Brake/tail lamp
left
or
Brake/tail lamp
right Vehicles with light and visibility pack-
age*: the left-hand or right-hand brake
lamp is faulty. X
Change the bulb (Y page 245). . 3rd brake lamp Vehicles with the lights and visibility pack-
age*: the third brake lamp is faulty. The
display message will only appear if all
LEDs are faulty. X
Visit a qualified specialist workshop. Practical advice
* optional
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Troubleshooting
224 Warning and indicator lamps in the instrument cluster
Problem Possible cause/consequence Suggested solutions
-
Theyellow ABS warning
lamp comes on while the
engine is running. G
Risk of accident
ABS (Anti-lock Brake System) is
deactivated due to a fault. There-
fore, ESP ®
(Electronic Stability
Program), BAS (Brake Assist), the
steering assistant STEER CON-
TROL, the hill start assist and the
tyre pressure loss warning sys-
tem are also deactivated.
The brake system continues to
function normally, but without
electronic support. The wheels
could therefore lock if you brake
hard.
If the ABS control unit is faulty,
other systems may also not be
available: e.g. Parktronic sys-
tem*, the navigation system* or
the Autotronic*. X
Drive on carefully.
X Observe the additional messages in the multi-function display
(Y page 202).
X Visit a qualified specialist workshop. -
The yellow ABS warning
lamp comes on while the
engine is running. G
Risk of accident
The on-board voltage is too low.
ABS has been deactivated due to
undervoltage. X
Switch off consumers that are not required, e g. reading lamps or
interior lighting.
ABS will be available again as soon as the vehicle's electrical sys-
tem voltage increases. Practical advice
* optional
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Troubleshooting
225Problem Possible cause/consequence Suggested solutions
Therefore, ESP
®
, BAS, the steer-
ing assistant STEER CONTROL,
hill start assist and the tyre pres-
sure loss warning system are also
deactivated.
The brake system continues to
function normall y, but without
electronic support. The wheels
could therefore lock if you brake
hard. v
The yellow ESP ®
warning
lamp is lit while the engine
is running. In addition, a
message appears in the
multi-function display. G
Risk of accident
ESP ®
is unavailable due to a mal-
function.
The following systems have also
been deactivated:
R BAS
R the steering assistant STEER
CONTROL
R hill start assist
R the tyre pressure loss warning
system
The braking system remains
available with full brake boosting
effect but without the above func-
tions. X
Observe the additional messages in the multi-function display
(Y page 202).
X Drive on carefully.
X Visit a qualified specialist workshop. Practical advice
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Troubleshooting
226 Problem Possible cause/consequence Suggested solutions
v
Theyellow ESP ®
warning
lamp flashes while the
vehicle is in motion. G
Risk of accident
ESP ®
or traction control has
intervened because there is a risk
of skidding or at least one wheel
has started to spin. X
Only depress the accelerator pedal as far as necessary when pull-
ing away.
X Release the accelerator pedal while you are driving.
X Adapt your driving style to suit the road and weather conditions.
X Do not deactivate ESP ®
. 1
The red SRS warning lamp
is lit while the engine is
running. G
Risk of injury
There is a malfunction in the
restraint system. The airbags or
belt tensioners may either be trig-
gered unintentionally or, in the
event of an accident, not be trig-
gered at all. X
Visit a qualified specialist workshop immediately. 1
The red SRS warning lamp
is lit while the engine is
running. In addition, the
indicator lamp 5
PASSENGER AIRBAG OFF
flashes in the centre con-
sole and a warning tone
sounds. The connector on the removable
front-passenger seat* is
detached. X
Attach the connector to the coupling on the seat (Y page 156).H
The red brake system
warning lamp comes on
while you are driving. A
warning tone also sounds. You are driving with the parking
brake applied. X
Release the parking brake.
The warning lamp goes out and the warning tone ceases. 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
230 Warning tones
Problem Possible cause/consequence Suggested solutions
The anti-theft warning alarm* is
triggered. You have opened the vehicle with
the anti-theft alarm system still
activated*. X
Switch off the alarm (Y page 57).You hear a warning tone. A message appears in the multi-
function displa
y. X
See the explanations for the display message ( Ypage 202). You are driving with the parking
brake applied. X
Release the parking brake. The light is switched on when you
leave the vehicle. X
Turn the light switch to MorU.
or
X If the rear foglamp is switched on: press the light switch in to the
stop. G
Risk of injury
The driver or front passenger has
not fastened their seat belt X
Fasten your seat belt ( Ypage 73). Practical advice
* optional
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Locking/unlocking in an emergency
243
X
Pull emergency release 1in the direction
of the arrow.
The fuel filler flap is unlocked.
X Open the fuel filler flap. Releasing the parking lock manually
on vehicles with AUTOTRONIC*
In the event of an electrical fault, it is possible
to release the selector lever lock manually to
move it out of position P, e.g. if you wish to
tow the vehicle away. 1
Cup holder
X Apply the parking brake.
X Pull up cup holder 1. Vehicles with the CLASSIC or AVANT-
GARDE*design/trim level
Releasing the parking lock manually
1
Screwdriver or similar implement
X Insert implement 1into the opening.
X Push implement 1in the direction of the
arrow and simultaneously move the selec-
tor lever out of position P.
X Remove implement 1.
The selector lever can now be moved freely
until it is returned to position P.Vehicles with the ELEGANCE*design/
trim level or with the optional front
compartment armrest* Releasing the parking lock manually
1
Screwdriver or similar implement
2 Release pin G
Risk of injury
Release pin 2can become very hot. There-
fore only press the release pin with a suit-
able screwdriver or similar implement; oth-
erwise, you could burn yourself.
X Use implement 1to press release pin 2
and simultaneously move the selector lever
out of position P.
The selector lever can now be moved freely
until it is returned to position P. Practical advice
* optional
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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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