check engine light MERCEDES-BENZ SL500 2002 R129 Owner's Manual

5 Contents
Practical hints First aid kit ..................................... 216
Stowing things in the vehicle ...... 216
Vehicle tools .................................... 217
Vehicle jack ..................................... 218
Fuses ................................................ 219
Hood .................................................220
Automatic transmission
fluid level ...................................222
Checking engine oil level .............222
Coolant level ...................................224
Adding coolant ...............................225
Windshield and
headlamp washer
fluid mixing ratio ......................226
Wheels .............................................227
Tire replacement ............................227
Rotating wheels ..............................228
Spare wheel ....................................229
Changing wheels ........................... 231
Tire inflation pressure ..................235
Battery .............................................237
Battery Recycling .......................238Jump starting ................................. 239
Towing the vehicle ........................ 241
Exterior lamps ............................... 243
Headlamp assembly
(Halogen) .................................... 244
Taillamp assemblies .................. 250
Changing batteries in the
remote control ........................... 252
Synchronizing ............................ 253
Raising soft top manually ............ 254
Replacing wiper blade ................. 258
Manual release of
fuel filler flap ............................ 260
Trunk lamp ..................................... 260
Vehicle care Cleaning and care
of the vehicle ............................. 262
Power washer ............................. 263
Tar stains .................................... 263
Paintwork, Painted Body
Components ................................ 263
Engine cleaning ......................... 264
Vehicle washing ......................... 264Ornamental moldings ................264
Headlamps, taillamps,
turn signal lenses ......................264
Window cleaning .......................265
Light alloy wheels ......................265
Instrument cluster .....................265
Steering wheel and
gear selector lever ......................265
Cup holder ...................................265
Seat belts .....................................266
Headliner, shelf behind
roll bars, and other hard
plastic trim items .......................266
Soft top .........................................266
Headliner .....................................267
Wind screen ................................267
Automatic antenna .....................267
Wiper blade .................................267
Headlamp cleaning
system ..........................................267
Leather upholstery .....................268
Plastic and rubber parts ............268
Illuminated door sill panels .....268

191 Driving systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index ABS control
The ABS malfunction indicator lamp- in the
instrument cluster comes on with the key in steering
lock position 2 and should go out with the engine
running.
When the ABS malfunction indicator lamp symbol and
warning in the instrument cluster comes on while the
engine is running, it indicates that the ABS has detected
a malfunction and has switched off. In this case, the
brake system functions in the usual manner, but
without antilock assistance.
With the ABS malfunctioning, the BAS and ESP are also
switched off. Both malfunction indicator lamps come on
with the engine running.
If the charging voltage falls below 10 volts, the
malfunction indicator lamp comes on and the ABS is
switched off. When the voltage is above this value again,
the malfunction indicator lamp should go out and the
ABS is operational.
If the ABS malfunction indicator light stays illuminated,
have the system checked at your authorized Mercedes-
Benz Center as soon as possible. Note:
To alert following vehicles to slippery road conditions
you discover, operate your hazard warning flashers as
appropriate.
Wa r n i n g !
ABS cannot prevent the natural laws of physics
from acting on the vehicle, nor can it increase the
traction made available by the road conditions. The
ABS cannot prevent accidents, including those
resulting from excessive speed in turns, following
another vehicle too closely, or aquaplaning. Only a
safe, attentive, and skillful driver can prevent
accidents. The capabilities of an ABS equipped
vehicle must never be exploited in a reckless or
dangerous manner which could jeopardize the
user’s safety or the safety of others.

199 Driving systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Adaptive Damping System (ADS)
(SL 600 only)
Depending upon road surface conditions, load, driving
style, ADS will automatically adjust the optimal ride
firmness.
The malfunction indicator lamp comes on with the key
in steering lock position 2 and should go out with the
engine running.
If the malfunction indicator lamp stays on after the
engine is running or comes on while driving, then the
system has detected a malfunction.
Have the ADS checked at your authorized
Mercedes-Benz Center as soon as possible.
Note:
If the power supply was interrupted (battery
disconnected or empty), the malfunction indicator lamp
will light up when the engine is running.
Turn the steering wheel from full left to full right lock
position. The light should go out. Adaptive damping system adjustment
The switch is located in the center console.
1Firm dampening program. This setting should be
used for sporty driving. During the setting for sporty
driving the indicator lamp in the switch lights up.
2Soft dampening program. This setting should be
used for regular driving.

202 Check regularly and before a long trip
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Check regularly and before a long trip 1Coolant level
See “Adding coolant” on page 224.
2Windshield washer and
headlamp cleaning system
For refilling reservoir see page 226.
3Engine oil level
See “Checking engine oil level” on page 222 and
“Engine oil level indicator” on page 82.
4Brake fluid
See “Brake fluid” on page 279.
Opening hood, see page 220.
Ve h i c l e l i g h t i n g : Check function and cleanliness. For
replacement of light bulbs, see “Exterior lamps” on page
243.
Exterior lamp switch, see page 84.

204 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Malfunction and indicator lamps
in the instrument cluster
General information:
If a bulb in the instrument cluster fails to light up
during the bulb self-check when turning the electronic
key in steering lock to position 2, have it checked and
replaced if necessary.
On-board diagnostic system
Check engine malfunction indicator lamp
Engine malfunction indicator lamp. If the
“CHECK ENGINE” malfunction indicator
lamp comes on when the engine is running,
it indicates a malfunction of the fuel management
system, emission control system, systems which impact
emissions, or the fuel cap is not closed tight (check the
fuel cap). If the “CHECK ENGINE” lamp is illuminated
continuously and the vehicle is driving normally, you
may still drive the vehicle, however, in all cases, we
recommend that you have the system checked at your
authorized Mercedes-Benz Center as soon as possible. If the “CHECK ENGINE” lamp comes on continuously
and / or the vehicle is not driving normally, serious
damage can occur to the emission system. Please
contact your authorized Mercedes-Benz Center
immediately.
The Sequential Multiport Fuel Injection (SFI) control
module monitors emission control components that
either provide input signals to or receive output signals
from the control module. Malfunctions resulting from
interruptions or failure of any of these components are
indicated by the “CHECK ENGINE” malfunction
indicator lamp in the instrument cluster and are
simultaneously stored in the SFI control module.
If the “CHECK ENGINE” malfunction indicator lamp
comes on, have the system checked at your authorized
Mercedes-Benz Center as soon as possible.
With some exceptions, the control module switches off
the “CHECK ENGINE” malfunction indicator lamp if the
condition, causing the lamp to come on, no longer exists
during three consecutive cycles. See also page 207 for
fuel cap placement warning.

205 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index An on-board diagnostic connector is located in the
passenger compartment near the engine hood release,
allowing the accurate identification of system
malfunctions through the readout of diagnostic trouble
codes.
Brake warning lamp
Except Canada
Canada only
With the key in steering lock position 2, the brake
warning lamp will come on. It should go out when the
engine is running.
The brake warning lamp will come on:
• when there is insufficient brake fluid in the
reservoir (engine running and parking brake
released), or
• when the parking brake is set (engine running).Note:
If you find that the minimum mark on the brake fluid
reservoir is reached, have the brake system checked for
brake pad thickness and leaks.
Brake pad wear indicator lamp
With the key in steering lock position 2, the
brake pad wear indicator lamp comes on. It
goes out when the engine is running.
If the indicator lamp lights up during braking, this
indicates that the brake pads are worn down.
Have the brake system checked at your authorized
Mercedes-Benz Center as soon as possible.
Wa r n i n g !
Driving with the brake warning lamp illuminated
can result in an accident. Have your brake system
checked immediately if the brake warning lamp
stays on. Don’t add brake fluid before checking the
brake system. Overfilling the brake fluid reservoir
can result in spilling brake fluid on hot engine
parts and the brake fluid catching fire. You can be
seriously burned.

207 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index Fuel reserve and fuel cap placement warning
With the key in steering lock position 2, the
fuel reserve warning lamp comes on. It
should go out immediately when the engine
is running.
If the warning lamp does not go out after starting the
engine, or if it comes on while driving, it indicates that
the fuel level is down to the reserve quantity of
approximately 2.6 gal (10 liters).
The warning lamp blinks when the fuel cap is not
closed, or a fuel system leak has been detected.
Retighten cap and see if warning lamp goes out after
restart and next OBD selfcheck.
If the warning lamp continues to blink after closing the
fuel cap correctly, have the fuel system checked at your
authorized Mercedes-Benz Center as soon as possible.
Leaving the engine running and the fuel cap open can
cause the “CHECK ENGINE” lamp to illuminate (see also
page 204).Electronic stability program (ESP) — warning lamp
The yellow ESP warning lamp in the
speedometer dial comes on with the key in
steering lock position 2. It should go out
with engine running.
See page 192 if the warning lamp lights up or flashes
when the vehicle is moving.
BAS/ESP malfunction indicator lamp
The malfunction indicator lamp for the ESP
is combined with that of the BAS.
The yellow BAS/ESP malfunction indicator
lamp in the instrument cluster comes on with the key in
steering lock position 2. It should go out with the engine
running.
If the BAS/ESP malfunction indicator lamp comes on
permanently with the engine running, see page 188
and 192.

209 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index Low engine coolant level warning lamp
With the key in steering lock position 2, the
warning lamp comes on. It should go out
when the engine is running.
If the warning lamp does not go out after starting the
engine, or if it comes on while driving, then the coolant
level has dropped below the required level. If no leaks
are noticeable and the engine temperature does not
increase, continue to drive to the nearest service station
and have coolant added to the coolant system,
see page 225.
The low engine coolant level warning light should not be
ignored. Extended driving with the light illuminated
may cause serious engine damage not covered by the
Mercedes-Benz Limited Warranty.In cases of major or frequent minor coolant loss, have
the cooling system checked at your authorized
Mercedes-Benz Center as soon as possible.
Note:
Do not drive without coolant in the cooling system. The
engine will overheat causing major engine damage.
Monitor the coolant temperature gauge while driving.
Wa r n i n 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.

210 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Low windshield and headlamp washer system fluid
level warning lamp
With the key in steering lock position 2, the
warning lamp comes on. It should go out
when the engine is running.
If the warning lamp does not go out after starting the
engine, or if it comes on while driving, the level of the
reservoir has dropped to approx. 1/3 of the total volume.
The reservoir should be refilled with MB Windshield
Washer Concentrate “S” and water (or commercially
available premixed windshield washer solvent/
antifreeze, depending on ambient temperature - see
page 88) at the next opportunity. The reservoir for the
windshield and headlamp washer systems is located in
the engine compartment.Low engine oil level warning lamp
With the key in steering lock position 2, the
oil level warning lamp comes on. It should
go out immediately when the engine is
running.
If the warning lamp does not go out after starting the
engine, or comes on with the engine 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 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.
The low engine oil level warning light should not be
ignored. Extended driving with the light illuminated
could result in serious engine damage that is not
covered by the Mercedes-Benz Limited Warranty.
In addition to the warning lamp, the engine oil level
should be periodically checked with the dipstick, for
example during a fuel stop, or before a long trip,
see page 222.

240 Jump starting
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Proceed as follows:
1. Position the vehicle with the charged battery so that
the jumper cables will reach, but never let the
vehicles touch. Make sure the jumper cables do not
have loose or missing unsulation.
2. On both vehicles:
• Turn off engine and all lights and accessories,
except hazard warning flashers or work lights.
• Apply parking brake and shift selector lever to
position “P”.
Important!
3. Clamp one end of the first jumper cable to the
positive (+) terminal of the discharged battery and
the other end to the positive (+) terminal of the
charged battery. Make sure the cable clamps do not
touch any other metal parts.
4. Clamp one end of the second jumper cable to the
grounded negative (-) terminal of the charged
battery and the final connection to the negative (-)
terminal of the discharged battery.Important!
5. Start engine of the vehicle with the charged battery
and run at high idle. Make sure the cables are not
on or near pulleys, fans, or other parts that will
move when the engine is started. Allow the
discharged battery to charge for a few minutes. Start
engine of the disabled vehicle in the usual manner.
6. After the engine has started, remove jumper cables
by exactly reversing the above installation
sequence, starting with the last connection made
first. When removing each clamp, make sure that it
does not touch any other metal while the other end
is still attached.
Note:
If engine does not run after several unsuccessful
starting attempts, have it checked at the nearest
authorized Mercedes-Benz Center.
Excessive unburned fuel may damage the catalytic
converter.