Page 268 of 384
268 Practical hintsWhat to do if …?Problem
Possible cause
Suggested solution
?
The yellow “CHECK ENGINE”
malfunction indicator lamp
comes on while driving.
There is a malfunction in:
The fuel management system
The ignition system
The emission control system
Systems which affect emissions
Such malfunctions may result in excessive
emissions values and may switch the engine
to its Limp-Home Mode (emergency opera-
tion).
Have the vehicle checked as soon as
possible by an authorized
Mercedes-Benz Center.
An on-board diagnostic connector is
used by the service station to link the
vehicle to the shop diagnostics sys-
tem. It allows the accurate identifica-
tion of system malfunctions through
the readout of diagnostic trouble
codes. It is located in the front left
area of the footwell next to the park-
ing brake pedal.
Your gas tank is empty.
After refuelling start the engine three
or four times in succession.
The Limp-Home Mode is canceled. You
do not need to have your vehicle
checked.
The yellow fuel tank reserve
warning lamp lights up while
driving.
The fuel level has dropped below the reserve
mark.
Refuel at the next gas station
(page 235).
The fuel cap not closed tight.
Check the fuel cap (
page 235).
Page 285 of 384
285 Practical hints
What to do if …?
Display
Possible cause
Possible solution
.
LIGHT SENSOR
VISIT WORKSHOP!
The lamp sensor is malfunctioning. The
headlamps switch on automatically.
In the control system, set lamp oper-
ation to manual (
page 136).
Switch on headlamps using the exte-
rior lamp switch.
BRAKE LIGHT
VISIT WORKSHOP!
Brake lamp illumination is delayed or lamp
is permanently on.
Visit an authorized Mercedes-Benz
Center as soon as possible.
DISPLAY MALFUNCTION
VISIT WORKSHOP!
The display for the lamps or the system is
malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
TURN OFF LIGHTS!
Lamps have been turned on although the
key in the starter switch is in position 0.
Turn off the lights.
TURN SIG. MIRROR, L
CHECK LIGHT!
The left turn signal in the side mirror is mal-
functioning. This message will only appear
if all light emitting diodes have stopped
working.
Visit an authorized Mercedes-Benz
Center as soon as possible.
TURN SIG. MIRROR, R
CHECK LIGHT!
The right turn signal in the side mirror is
malfunctioning. This message will only ap-
pear if all light emitting diodes have
stopped working.
Visit an authorized Mercedes-Benz
Center as soon as possible.
TURN SIG., LF
CHECK LIGHT!
BACK-UP LIGHT ON!
The left front turn signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
Page 287 of 384
287 Practical hints
What to do if …?
.
STANDING LIGHT, R
CHECK LIGHT!
BACK-UP LIGHT ON!
The right standing signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
FRONT FOGLIGHT, L
CHECK LIGHT!
The left front fog lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
FRONT FOGLIGHT, R
CHECK LIGHT!
The right front fog lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
LOW BEAM, L
CHECK LIGHT!
The left low beam lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
LOW BEAM, R
CHECK LIGHT!
The right low beam lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
3RD BRAKE LIGHT
CHECK LIGHT!
The high mounted brake lamp is malfunc-
tioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
BRAKE LIGHT, L
CHECK LIGHT!
BACK-UP LIGHT ON!
The left brake lamp is malfunctioning. A
back-up bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
BRAKE LIGHT, R
CHECK LIGHT!
BACK-UP LIGHT ON!
The right brake lamp is malfunctioning. A
back-up bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
REVERSE LIGHT, L
CHECK LIGHT!
The left backup lamp is malfunctioning.
Replace the bulb as soon as possible.
Display
Possible cause
Possible solution
Page 288 of 384
288 Practical hintsWhat to do if …?.
REVERSE LIGHT, R
CHECK LIGHT!
The right backup lamp is malfunctioning.
Replace the bulb as soon as possible.
REAR FOGLIGHT
CHECK LIGHT!
The rear fog lamp is malfunctioning.
Replace the bulb as soon as possible.
LICENSE PLATE LIGHT, L
CHECK LIGHT!
The left license plate lamp is malfunction-
ing.
Replace the bulb as soon as possible.
LICENSE PLATE LIGHT, R
CHECK LIGHT!
The right license plate lamp is malfunction-
ing.
Replace the bulb as soon as possible.
TAIL LIGHT, L
CHECK LIGHT!
BACK-UP LIGHT ON!
The left tail lamp is malfunctioning. A
back-up bulb is being used.
Replace the bulb as soon as possible.
TAIL LIGHT, R
CHECK LIGHT!
BACK-UP LIGHT ON!
The right tail lamp is malfunctioning. A
back-up bulb is being used.
Replace the bulb as soon as possible.
TURN SIG., LR
CHECK LIGHT!
BACK-UP LIGHT ON!
The left rear turn signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
TURN SIG., RR
CHECK LIGHT!
BACK-UP LIGHT ON!
The right rear turn signal lamp is malfunc-
tioning. A back-up bulb is being used.
Replace the bulb as soon as possible.
!
PARK. BRAKE
RELEASE BRAKE!
You are driving with the parking brake en-
gaged.
Release the parking brake
(page 44).
Display
Possible cause
Possible solution
Page 302 of 384
302 Practical hintsReplacing bulbs
Replacing bulbsSafe vehicle operation depends on proper
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp as-
semblies are in good working order at all
times.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals and when a
bulb has been replaced. See your autho-
rized Mercedes-Benz Center for headlamp
adjustment.
Bulbs Front lamps
iBack-up bulbs will be brought into use
when the following lamps malfunction:
Turn signal lamps
Brake lamps
Parking lamps
Tail lamps
Lamp
Type
1
Additional turn sig-
nal lamps
LED
2
Turn signal lamp
1156 A
3
High beam flasher
H7-55 W
4
Side marker lamp
W 5 W
5
Fog lamp
HB4-55 W
6
Parking and stand-
ing lamps
H 6 W
7
Low beam and high
beam
Xenon
1
D2S-35 W
1Bi-Xenon headlamps: For safety reasons (high volt-
age), do not replace the xenon bulb yourself. See
your authorized Mercedes-Benz Center.
Page 303 of 384
303 Practical hints
Replacing bulbs
Rear lamps Notes on bulb replacement
Use only 12 volt bulbs of the same type
and with the specified watt rating.
Switch lights off before changing a bulb
to prevent short circuits.
Always use a clean lint-free cloth when
handling bulbs.
Your hands should be dry and free of oil
and grease.
If the newly installed bulb does not light
up, visit an authorized Mercedes-Benz
Center.
Have the LEDs and bulbs for the follow-
ing lamps replaced by an authorized
Mercedes-Benz Center:
Additional turn signal lamps in the
exterior rear view mirrors
Bi-Xenon lamps
Front fog lamps
High mounted brake lamp
Brake lamp
Rear side marker
Lamp
Type
8
High mounted brake
lamp
LED
9
Brake lamp
LED
10
Tail, parking and
standing lamp
P 21/4 W
Side marker lamp
LED
11
Backup lamp
P 21 W
12
License plate lamps
C 5 W
13
Rear fog lamp,
driver’s side
P 21/4 W
14
Turn signal lamp
PY 21 W
Warning!
G
Keep bulbs out of reach of children.
Bulbs and bulb sockets can get very hot. Al-
low the lamp to cool down before changing
a bulb.
Halogen lamps contain pressurized gas. A
bulb can explode if you
touch or move it when hot
drop the bulb
scratch the bulb
Wear eye and hand protection.
Because of high voltage in Bi-Xenon lamps,
it is dangerous to replace the bulb or repair
the lamp and its components. We recom-
mend that you have such work done by a
qualified technician.
Page 317 of 384
317 Practical hints
Jump starting
The battery is located on the right side of
the trunk under the battery cover
(page 313).
Make sure that the two vehicles do not
touch.
Turn off all electrical consumers.
Apply parking brake.
Shift gear selector lever to positionP.
Open the trunk lid.
Remove battery cover.
Connect positive terminals 1 and3 of
the batteries with the jumper cable.
Clamp cable to charged battery3 first.1Positive terminal of discharged battery
2Negative terminal of discharged bat-
tery
3Positive terminal of charged battery
4Negative terminal of charged battery
Start engine of the vehicle with the
charged battery and run at idle speed.
Connect negative terminals 2 and4 of
the batteries with the jumper cable.
Clamp cable to charged battery4 first.
Start the engine of the disabled vehi-
cle.
You can now turn on the electrical con-
sumers. Do not turn on the lights under
any circumstances.
Remove the jumper cables first from
negative terminals2 and4 and then
from positive terminals1 and3.
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
(page 243).
!Never invert the terminal connections.
!Do not tow-start the vehicle.
Page 340 of 384
340 Technical dataFuels, coolants, lubricants etc.Brake fluid
During vehicle operation, the boiling point
of the brake fluid is continuously reduced
through the absorption of moisture from
the atmosphere. Under extremely strenu-
ous operating conditions, this moisture
content can lead to the formation of bub-
bles in the system, thus reducing the sys-
tem’s efficiency.
Therefore, the brake fluid must be re-
placed every two years, preferably in the
spring.
Only brake fluid approved by
Mercedes-Benz is recommended. Your au-
thorized Mercedes-Benz Center will pro-
vide you with additional information.
Premium unleaded gasoline
Fuel requirements
Use only premium unleaded gasoline
meeting ASTM standard D 439:
The octane number (posted at the
pump) must be min. 91 for CL 500 and
CL 55 AMG and min. 93 for CL 600. It
is an average of both the Research (R)
octane number and the Motor (M) oc-
tane number: (R+M) / 2). This is also
known as the ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not exceed
10%; MTBE not to exceed 15%.
!To maintain the engine’s durability and
performance, premium unleaded gaso-
line must be used. If premium unleaded
is not available and low octane fuel is
used, follow these precautions:
Have the fuel tank only partially
filled with unleaded regular and fill
up with premium unleaded as soon
as possible.
Avoid full throttle driving and abrupt
acceleration.
Do not exceed an engine speed of
3000 rpm if the vehicle is loaded
with a light load such as two per-
sons and no luggage.
Do not exceed 2 / 3 of maximum ac-
celerator pedal position if the vehi-
cle is fully loaded or operating in
mountainous terrain.
