2004 MERCEDES-BENZ SLK CLASS check engine light

52 Safety and SecurityOccupant safety
Occupant safetyIn this section you will learn the most im-
portant facts about the restraint systems
of the vehicle.
The restraint systems are

Seat belts


Emergency tensioning device


Airbags


Child seats


Child seat recognition
As independent systems their protective
effects work in conjunction with each oth-
er.The1indicator lamp in the instrument
cluster lights up for about four seconds
when you turn the key in the steering lock
to position1 or2. It goes out when you
start the engine. This shows that the re-
straint systems are operational.
If the lamp does not come on at all or if it
fails to extinguish after approximately four
seconds or if it comes on thereafter, a mal-
function in the system has been detected.
More information can be found in the
“Practical hints” section (
page 203).
iFor information on infants and children
traveling with you in the vehicle and re-
straint systems for infants and chil-
dren, see “Children in the vehicle”
(page 60).
Warning!
G
In the event that the SRS malfunction indica-
tor lamp lights up during driving or does not
come on at all, the SRS may not be opera-
tional. For your safety, we strongly recom-
mend that you visit an authorized
Mercedes-Benz Center immediately to have
the system checked; otherwise the SRS may
not be activated when needed in an acci-
dent, which could result in serious or fatal
injury, or it might deploy unexpectedly and
unnecessarily which could also result in inju-
ry.
Improper work on the restraint systems, in-
cluding incorrect installation and removal,
can lead to possible injury through an unin-
tended activation of the SRS.
In addition, through improper work there is
a risk of rendering the SRS inoperative or
causing unintended airbag deployment.
Work on the SRS must therefore only be per-
formed by qualified technicians. Contact
your authorized Mercedes-Benz Center.

206 Practical hintsWhat to do if …When the low engine oil level warning lamp
does not go out after starting the engine,
or comes on while the engine is running
and at operating temperature, the engine
oil level has dropped to approximately the
minimum mark on the dipstick.When this occurs, the warning lamp will
first come on intermittently and then stay
on if the oil level drops further.
If no oil leaks are noted, continue to drive
to the nearest service station where the
engine oil should be topped to the “full”
mark on the dipstick with an approved oil.Problem
Possible cause
Suggested solution
_
The red telescoping steering
column* warning lamp remains
lit after starting the engine.
The adjustable steering column is not locked
properly.

Lock the steering column
(page 34).
W
The yellow low windshield and
headlamp* washer system fluid
level warning lamp remains lit af-
ter starting the engine or lights
up while driving.
The fluid level has dropped to about
1/3 of
total reservoir capacity.

Add washer fluid (
page 184).
N
The yellow low engine oil level
warning lamp remains lit after
starting the engine or comes on
while driving.
The engine oil level has sunk to the minimum
level.

Check the engine oil level
(page 175) and add oil as required
(page 179).

If you must add engine oil frequently,
have the engine checked for possible
leaks.!The low engine oil level warning light
should not be ignored. Extended driv-
ing with the light illuminated could re-
sult in serious engine damage that is
not covered by the Mercedes-Benz
Limited Warranty.

207 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
The fuel reserve and fuel cap placement
warning lamp:

lights up while driving
The fuel level has gone below the reserve
mark.

Refuel at the next gas station
(page 171).


blinks
The fuel cap is not closed tight.

Check the fuel cap.
A fuel system leak has been detected.

Have the fuel system checked as soon
as possible by an authorized
Mercedes-Benz Center
B
The yellow low engine coolant
level warning lamp remains lit af-
ter starting the engine or lights
up while driving.
The coolant level is too low.

Add coolant (
page 180).

If you have to add coolant frequently,
have the cooling system checked by
an authorized Mercedes-Benz Center.
Warning!
G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You can be seriously burned.
!Do not ignore the low engine coolant
level warning light. Extended driving
with the light illuminated may cause
serious engine damage not covered by
the Mercedes-Benz Limited Warranty.
Do not drive without sufficient amount
of coolant in the cooling system. The
engine will overheat, causing major
engine damage.

208 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
#
The red charge indicator lamp
lights up while the engine is
running.
The battery was charged with a battery
charger or jump started.

Have the battery checked at a service
station.
The battery is no longer charging.
Possible causes:

alternator malfunctioning


broken poly-V-belt

Stop immediately and check the
poly-V-belts.
If one is broken:

Do not continue to drive. Otherwise
the engine will overheat due to an in-
operative water pump which may re-
sult in damage to the engine. Notify
an authorized Mercedes-Benz Center.
If it is intact:

Drive immediately to the nearest
authorized Mercedes-Benz Center.
Adjust driving to be consistent with
reduced braking responsiveness.

209 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
2
The yellow brake pad wear indi-
cator lamp lights up while brak-
ing.
The brake pads have reached their wear limit.

Have the brake pads replaced as soon
as possible.
.
The yellow exterior lamp failure
indicator lamp lights up while
applying the brake and stays on
until the engine is turned off.
One of the brake lamps is malfunctioning.

Replace the bulb as soon as possible
(page 226).
.
The yellow exterior lamp failure
indicator lamp remains lit after
starting the engine or lights up
while driving.
One of the following lamps is malfunctioning:

parking lamp


tail lamp


brake lamp


low beam head lamp

Replace the bulb as soon as possible
(page 226).
!Brake pad thickness must be visually
checked by a qualified technician at the
intervals specified in the Service book-
let.
iAdditional lighting equipment, if not
properly installed (e.g. auxiliary head-
lamps etc.), could cause the failure in-
dicator monitoring unit to malfunction.
We therefore recommend that an au-
thorized Mercedes-Benz Center install
such equipment for you.
iIf an exterior lamp fails, the indicator
lamp will come on only when that lamp
is switched on.

255 Practical hints
Jump starting
The battery is located on the right side of
the engine compartment.
Make sure the two vehicles do not
touch.

Turn off all electrical consumers.

Apply parking brake.

Shift gear selector lever to positionP
(manual transmission to Neutral).

Open the hood.

Connect positive terminals1 and2
of the batteries with the jumper cables.
Clamp cable to charged battery1
first.1Positive terminal of charged battery
2Positive terminal of discharged battery
3Negative terminal of discharged
battery
4Negative terminal of charged battery

Start engine of the vehicle with the
charged battery and run at idle speed.

Connect negative terminals3 and4
of the batteries with the jumper cables.
Clamp cable to charged battery4
first.

Start the engine of the disabled vehi-
cle.
You can now again turn on the electrical
consumers. Do not turn on the lights under
any circumstances.

Remove the jumper cables first from
negative terminals3 and4 of the
batteries and then from positive
terminals1 and2.
You can now turn on the lights.

Have the battery checked at the near-
est authorized Mercedes-Benz Center.
Warning!
G
Keep flames or sparks away from battery.
Do not smoke.
Observe all safety instructions and precau-
tions when handling automotive batteries.
!Never invert the terminal connections.
iVehicles with automatic transmission:
Do not tow-start vehicle.

296 IndexCentral locking
From inside 80
Unlocking from inside 80
Certification label 266
Changing CDs
CD mode 121
Charging
Vehicle battery 252
CHECK ENGINE malfunction indicator
lamp 205
Checking
Coolant level 173, 180
Oil level 172, 175
Tire inflation pressure 173
Vehicle lighting 173
Child safety 60
Airbags 54
Infant and child restraint systems 57,
60
Cigarette lighter 143
Cleaning
Cloth upholstery 197Cup holder 196
Gear selector lever 196
Hard plastic trim items 196
Headliner 197
Instrument cluster 196
Leather upholstery 197
Light alloy wheels 196
Plastic and rubber parts 197
Rear window 195
Seat belts 197
Steering wheel 196
Windows 195
Windshield 45
Wiper blades 195
Cleaning*
Headlamps 99
Climate control 102
Adjusting air distribution 105
Adjusting air volume 105
Air conditioning 106
Air recirculation mode 106
Deactivating the climate control
system 110
Defogging windshield 110
Defrosting 109Reactivating the climate control
system 110
Rear window defroster 101
Residual heat utilization 107
Residual ventilation 107
Setting the temperature 104
Clock 21
Setting 91
Closing
Glove box 139
Hood 175
Retractable hardtop 221
Side windows 128
Trunk lid 78
Windows 128
Closing hardtop
In an emergency 221
Cloth upholstery
Cleaning 197
Cockpit 18, 287
Coin holder 142
Collapsible tire 287

301 Index
Interior lighting 87
Automatic control 87
Deactivating automatic control 87
Manual control 88
Manual operation 88
Interior storage spaces 139
Cup holder 140
Glove box 139
Parcel net in front passenger
footwell 141
Storage compartment in armrest 141
Storage compartment in center
console 140
J
Jack 212
Jump starting 254K
Key 216
Positions in steering lock 29
Remote control 74
Starting the engine 40, 41
Key positions in steering lock 29
Key, Remote control
Loss of 76
Keys 74
Kickdown 98, 288
L
Labels, identification 266
Lamp bulbs, exterior 226
Lamps, exterior
Front 226
Rear 227
Lamps, indicator and warning
ABS 201
Airbag Off 56
Battery (Remote control) 75Brakes 204
CHECK ENGINE 205
Engine diagnostics 205
ESP 200
Fuel reserve 207
Instrument cluster 207
Seat belts 205
Service indicator 190
SRS 52
Turn signals 21
Lamps, malfunction indicator
BAS/ESP 200
Layout of poly-V-belt drive 267
Leather upholstery
Cleaning 197
License plate lamps
Replacing bulbs 227, 231
Light alloy wheels
Cleaning 196
Technical data 270
Lighter see Cigarette lighter 143
Lighting 83
Combination switch 85
Daytime running lamp mode 84
Exterior lamp switch 83
Front fog lamps 84