Page 254 of 376
254 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
D
The red coolant warning lamp
lights up when the engine is run-
ning.
There is insufficient coolant in the reservoir.
If this warning lamp lights up frequently,
there is a leak in the cooling system.
If the coolant level is correct, the electric ra-
diator fan may be broken.
Immediately add coolant to prevent
engine from overheating
(page 230).
Have the cooling system checked.
If the coolant temperature is below
257 °F (125 °C), you can continue
driving to the nearest authorized
Mercedes-Benz Center.
Avoid high engine loads (e.g. driving
uphill) and stop-and-go driving.
D
The red coolant warning lamp
lights up while driving and you
hear a warning sound.
The coolant temperature has exceeded
257 °F (125 °C).
Stop as soon as possible and allow
the engine and coolant to cool down.
Warning!
G
Driving when your engine is badly overheat-
ed can cause some fluids which may have
leaked into the engine compartment to
catch fire. You could be seriously burned.
Steam from an overheated engine can cause
serious burns and can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until it
cools down.
Page 255 of 376
255 Practical hints
What to do if …
Problem
Possible cause
Suggested solution
C
The yellow roll bar warning lamp
lights up or flickers when the en-
gine is running.
The roll bar is not operational.
For safety reasons, always have the
roll bar raised when driving with the
retractable hardtop open. Attempt to
raise the roll bar manually.
Have the roll bar checked by an au-
thorized Mercedes-Benz Center.
A
The yellow fuel tank reserve
warning lamp lights while driv-
ing.
The fuel level has gone below the reserve
mark.
Refuel at the next gas station
(page 225).
The fuel cap is not closed tight.
Check the fuel cap (
page 225).
Warning!
G
If the roll bar warning lamp does not light up,
does not go out after a long time, flickers or
lights up while driving as described above,
then the roll bar system is not operating
properly and may not activate in an acci-
dent. In this case, raise the roll bar manually
(page 61) before continuing to drive.
Page 256 of 376
256 Practical hintsWhat to do if …Problem
Possible cause
Suggested solution
?
The yellow CHECK ENGINE mal-
function indicator lamp comes
on while driving.
There is a malfunction in:
The fuel injection system
The ignition system
The emission control system
Systems which effect emissions
Such malfunctions may result in excessive
emissions values and may switch the engine
to its limp-home (emergency operation)
mode.
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.
The fuel cap is not closed tightly.
Check the fuel cap.
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 red seat belt warning lamp
lights up after starting the en-
gine.
The warning lamp reminds you to fasten seat
belts.
Fasten your seat belt.
Page 297 of 376
297 Practical hints
Replacing bulbs
Notes on bulb replacement
Only use 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 following
lamps replaced by an authorized
Mercedes-Benz Center:
the additional turn signals in the exteri-
or rear view mirrors
the high mounted brake lamp
the brake lamps
the parking lamps and the side marker
lamps in the tail lamp assemblies
the rear fog lamps
the low beam (Xenon or Bi-Xenon*)
lamps
the front fog lamps
Warning!
G
Bulbs and bulb sockets can be very hot. Al-
low the lamp to cool down before changing
a bulb.
Keep bulbs out of reach of children.
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 Xenon lamps, it is
dangerous to replace the bulb or repair the
lamp and its components. We recommend
that you have such work done by a qualified
technician.
Page 298 of 376
298 Practical hintsReplacing bulbsReplacing bulbs for front lamps
1Bulb socket for turn signal lamp
2Low beam lamp cover (Xenon or
Bi-Xenon* lamp). Do not remove.
3High beam lamp coverReplacing front turn signal bulb
Switch off the lights.
Open the hood (
page 227).
Twist bulb socket 1 counterclockwise
and pull out.
Push bulb into socket, turn counter-
clockwise and remove.
Insert new bulb in socket, push and
twist clockwise.
Reinsert bulb socket in lamp and twist
clockwise.Replacing high beam bulbs
1High beam bulbs
2Locking mechanism
3Parking and standing lamps
Switch off the lights.
Open the hood (
page 227).
Press ends of headlamp cover tab to-
gether and remove cover.
Pull electrical connector off.
Turn the locking mechanism 2 counter-
clockwise and take out the bulb.
Insert the new bulb so that the base lo-
cates in the recess on the holder.
Warning!
G
Do not remove the cover for the Xenon or
Bi-Xenon*headlamp. Because of high volt-
age in Xenon and Bi-Xenon* lamps, it is dan-
gerous to replace the bulb or repair the lamp
and its components. We recommend that
you have such work done by a qualified
technician.
Page 324 of 376
324 Practical hintsJump startingThe starter battery is located in the engine
compartment.
Make sure that the two vehicles do not
touch.
Turn off the engine.
Turn off all electrical consumers.
Apply parking brake.
Shift selector lever to positionP.1Negative terminal of charged battery
2Negative terminal of discharged
battery
3Positive terminal of discharged battery
4Positive terminal of charged battery
Remove the red cover from positive ter-
minal on both vehicles (
page 319).
Connect the positive terminals 3 and 4
of the batteries with the jumper cables.
Start with the charged battery.
Start the engine of the vehicle with the
charged battery and run at idle speed.
Connect the negative terminals 1 and 2
of the batteries with the jumper cables.
Start with the charged battery.
Start the engine of the disabled vehi-
cle.
Now you can again turn on the electri-
cal consumers. Do not turn on the
lights under any circumstances.
Remove the jumper cables first from
the negative terminals 1 and 2 of the
batteries and then from the positive
terminals 3 and 4.
Have the battery checked at the near-
est Mercedes-Benz Center.
Warning!
G
Never lean over the battery while connect-
ing or jump starting.Warning!
G
Keep flames or sparks away from battery.
Do not smoke.
Observe all safety instructions and precau-
tions when handling automotive batteries
(page 232).
iThe vehicle cannot be started via
tow-start.
