2010 MERCEDES-BENZ CL CLASS check engine

Display messages
Possible causes/consequences and
X Solutions Key Not
Detected
(message
appears in
red) The SmartKey with KEYLESS-GO is not detected while the
engine
is
running because the SmartKey is not in the vehicle.
X Stop the vehicle as soon as it is safe to do so.
X Engage the electronic parking brake.
X Search for the SmartKey.
The vehicle cannot be locked centrally nor can the engine
be started again after the engine is stopped. Â Key Not
Detected
(message
appears in
red) The SmartKey with KEYLESS-GO is not detected while the
engine is running because there is strong radio-frequency
interference.
X
Stop the vehicle as soon as it is safe to do so.
X Engage the electronic parking brake.
X Remove the KEYLESS-GO button from the starter switch
(Y page 263).
X Operate the vehicle with the SmartKey in the starter switch. Â Key Not
Detected
(message
appears in
red) The SmartKey with KEYLESS-GO is momentarily not detected.
X
Change the position of the SmartKey in the vehicle.
X If necessary, remove the KEYLESS-GO button from the
starter switch ( Y page 263).
X Operate the vehicle with the SmartKey in the starter switch. Â Key Not
Detected
(message
appears in
white) The SmartKey with KEYLESS-GO is momentarily not detected.
X
Change the position of the SmartKey in the vehicle.
X If necessary, remove the KEYLESS-GO button from the
starter switch ( Y page 263).
X Operate the vehicle with the SmartKey in the starter switch. Â Key Being
Initialize
d… Please
Wait The SmartKey with KEYLESS-GO is being initialized in the
vehicle.
X
Wait until the message disappears from the multifunction
display. Â Remove
'Start'
Button
and
Insert Key The KEYLESS-GO system is malfunctioning.
X
Remove the KEYLESS-GO button from the starter switch
(Y page 263).
X Operate the vehicle with the SmartKey in the starter switch. ¥ Check
Washer
Fluid The water level has dropped to approximately 1.1 US qts
(1.0 l).
X
Add washer fluid ( Y page 372). Vehicle status messages in the multifunction display
441
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Engine
Display messages
Possible causes/consequences and
X Solutions+ Check
Coolant
Level See
Oper.
Manual The coolant level is too low.
X
Add coolant (Y page 372).
X If you have to add coolant frequently, have the cooling
system checked at an authorized Mercedes-Benz Center. G
Warning!
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 could be seriously burned.
! Do not ignore the low engine coolant level warning. Extended driving with the message
and symbol
displayed 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. Display messages
Possible causes/consequences and
X Solutions? Coolant
Low Stop
Vehicle
Turn
Engine Off The coolant is too hot.
X
Stop the vehicle immediately as soon as it is safe to do so.
X Turn off the engine immediately.
X Engage the parking brake.
X Only start the engine again after the message disappears.
You could otherwise damage the engine.
X Observe the coolant temperature gauge in the instrument
cluster.
X If the temperature rises again: Contact an authorized
Mercedes-Benz Center immediately.
During severe operation conditions and stop-and-go city
traffic, the coolant temperature may rise close to 248‡
(120†). G
Warning!
Driving when your engine is overheated 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 which can occur just by opening the
engine hood. Stay away from the engine if you see or hear steam coming from it.
Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the
vehicle and do not stand near the vehicle until the engine has cooled down. 442
Vehicle status messages in the multifunction display
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!
The engine should not be operated with the coolant temperature above 248‡
(120†).
Doing so may cause serious damage which is not covered by the Mercedes-Benz Limited
Warranty. Display messages
Possible causes/consequences and
X Solutions? Coolant
Low Stop
Vehicle
Turn
Engine Off The poly-V-belt could be broken.
X
Stop the vehicle immediately as soon as it is safe to do so.
X Turn off the engine immediately.
X Check the poly-V-belt.
X If it is broken: Do not continue to drive. Otherwise the
engine will overheat due to an inoperative water pump
which may result in damage to the engine. Contact an
authorized Mercedes-Benz Center.
X If it is intact: Do
not continue to drive the vehicle with this
message displayed. Doing so could result in serious engine
damage that is not covered by the Mercedes-Benz Limited
Warranty.
X Observe the coolant temperature gauge in the instrument
cluster.
X Drive to the nearest authorized Mercedes-Benz Center
immediately. ? The radiator cooling fan is malfunctioning.
X
Observe the coolant temperature gauge in the instrument
cluster.
If the

coolant temperature is below 248‡ (120†), you may
continue driving to an authorized Mercedes-Benz Center.
X Avoid placing heavy loads on the engine (e.g. by driving
uphill) as well as stop-and-go traffic.
X Have the fan replaced as soon as possible. Vehicle status messages in the multifunction display
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Display messages
Possible causes/consequences and
X Solutions# The battery is no longer charging.
Possible causes:
R
alternator malfunctioning
R broken poly-V-belt
R a malfunction in the electronic system
X Stop immediately in a safe location or as soon as it is safe
to do so and check the poly-V-belt.
X If it is broken: Do not continue to drive. Otherwise the
engine will overheat due to an inoperative water pump
which may result in damage to the engine. Contact an
authorized Mercedes-Benz Center.
X If it is intact: Drive to the nearest authorized Mercedes-
Benz Center immediately. Adjust driving to be consistent
with reduced braking responsiveness. 4 Check
Engine
Oil at
Next
Refueling CL 550 4MATIC and CL 63 AMG only:
The engine oil level has dropped to approximately the
minimum level.
X
Check the engine oil level ( Y page 369) and add engine oil
as required (Y page 371).
X If you must add engine oil frequently, have the engine
checked for possible leaks. 4 Check
Engine
Oil Level
(Add 1
quart)
(USA only)
Check
Engine
Oil Level
(Add 1
Liter)
(Canada
only) CL 600 and CL 65 AMG only:
The engine oil level is too low.
X
Add engine oil ( Y page 371) and check the engine oil level
(
Y page 369).
X If you must add engine oil frequently, have the engine
checked for possible leaks. If the message
Check Engine
Oil at Next
Refueling (CL 550 4MATIC and CL 63 AMG
only) or Check Engine Oil Level (Add 1
quart) (Canada: 1 Liter) (CL 600 and CL
65 AMG) appears while the engine is running
and at operating temperature, the engine oil level has dropped to approximately the
minimum level.
The message will be stored in the vehicle
status message memory after you have
cleared it from the multifunction display.444
Vehicle status messages in the multifunction display
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Visually check for oil leaks. If there are no
obvious
oil
leaks, drive to the nearest service
station to refill your engine oil to the required
level.
For information on approved engine oils
contact an authorized Mercedes-Benz Center
or visit www.mbusa.com (USA only). !
Engine oil level warnings should not be
ignored. Extended driving with the symbol
displayed could result in serious engine
damage that is not covered by the
Mercedes-Benz Limited Warranty. Display messages
Possible causes/consequences and
X Solutions4 Engine
Oil Level
Cannot Be
Measured CL 600 and CL 65 AMG only:
The measuring system is malfunctioning.
X
Have the measuring system checked at an authorized
Mercedes-Benz Center. 4 Engine
Oil Level
Too High CL 600 and CL 65 AMG only:
You have added too much engine oil. There is a risk of
damaging the engine or the catalytic converter.
X
Have oil siphoned or drained off. Observe all legal
requirements with respect to its disposal. 4 Engine
Oil Level
Low Stop
Vehicle
Turn
Engine Off CL 600 and CL 65 AMG only:
The engine oil level is too low. There is a danger of engine
damage.
X
Stop the vehicle in a safe location or as soon as it is safe
to do so.
X Turn off the engine.
X Engage the parking brake.
X Add engine oil ( Y page 371) and check the engine oil level
(
Y page 369). C The fuel level is low.
X
Refuel at the next gas station. 8 Reserve
Fuel The fuel level has dropped below the reserve mark.
X
Refuel at the next gas station. 7 Gas Cap
Loose A loss of pressure has been detected in the fuel system. The
fuel cap may not be closed properly or the fuel system may
be leaking.
X
Check the fuel cap ( Y page 367).
X If it is not closed properly: Close the fuel cap.
X If it is closed properly: Have the fuel system checked at
an authorized Mercedes-Benz Center. Vehicle status messages in the multifunction display
445
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Brake
Problem
Possible causes/consequences and
X Solutions!
The yellow ABS
indicator lamp
comes on while
the engine is
running. The brake system is still functioning normally but due to a
malfunction, the ABS, the BAS, the BAS PLUS, the ESC, the
hill-start assist system, the HOLD function, the Adaptive Brake
Lights, the PRE-SAFE
®
system, and the PRE-SAFE ®
Brake are
unavailable.
X Continue driving with added caution. Wheels may lock during
hard braking, reducing steering capability.
X Adjust driving to be consistent with reduced braking
responsiveness.
X Read and observe messages that may appear in the
multifunction display (Y
page 414).
X Have the system checked at an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions increases the risk of an
accident. !
The yellow ABS
indicator lamp
comes on while
the engine is
running. The brake system still functions normally but due to insufficient
power supply, the ABS, the BAS, the BAS PLUS, the ESC, the
hill-start assist system, the HOLD function, the Adaptive Brake
Lights, the PRE-SAFE
®
system, and the PRE-SAFE ®
Brake are
unavailable.
When the voltage is above the required value again, the ABS is
operational again. The ABS indicator lamp should go out.
X Continue driving with added caution. Wheels may lock during
hard braking, reducing steering capability.
X Adjust driving to be consistent with reduced braking
responsiveness.
X Read and observe messages that may appear in the
multifunction display (Y

page 414).
X If the ABS indicator lamp does not go out: Have the alternator
and the battery checked. What to do if …
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Problem
Possible causes/consequences and
X Solutions!
The yellow ABS
indicator lamp
comes on while
the engine is
running. The brake system is still functioning normally but temporarily the
ABS,
the
BAS, the BAS PLUS, the ESC, the hill-start assist system,
the HOLD function, the Adaptive Brake Lights, the PRE-SAFE ®
system, and the PRE-SAFE ®
Brake are unavailable.
The self-diagnosis has not been completed yet.
The indicator lamp will go out after driving a short distance at a
vehicle speed of above 12 mph (20 km/h).
If the ABS indicator lamp does not go out:
X Continue driving with added caution. Wheels may lock during
hard braking, reducing steering capability.
X Adjust driving to be consistent with reduced braking
responsiveness.
X Read and observe messages that may appear in the
multifunction display (Y

page 414).
X Have the system checked at an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions increases the risk of an
accident. ÷
å
!
The
yellow

ESC warning
lamp, the yellow ESC
OFF warning lamp, and
the yellow ABS
indicator lamp come on
while the engine is
running and an
acoustic warning
sounds. The Electronic Brake Proportioning (EBP) switched off due to a
malfunction.
The ABS, the BAS, the BAS PLUS, the ESC, the hill-start assist
system, the HOLD function, the Adaptive Brake Lights, the
PRE-SAFE
®
system, and the PRE-SAFE ®
Brake are also switched
off.
The brake system is still functioning normally but without the
systems specified above available.
X Continue driving with added caution. Wheels may lock during
hard braking, reducing steering capability.
X Adjust driving to be consistent with reduced braking
responsiveness.
X Read and observe messages that may appear in the
multifunction display (Y

page 414).
X Have the system checked at an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions increases the risk of an
accident. 452
What to do if …
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Problem
Possible causes/consequences and
X SolutionsF (USA only)
! (Canada only)
The red indicator lamp
for the electronic
parking brake flashes
and/or the yellow
warning lamp for the
electronic parking
brake is on. The electronic parking brake is malfunctioning or defective.
X
Read and observe messages that may appear in the
multifunction display (Y
page 414).
X Have the system checked at an authorized Mercedes-Benz
Center as soon as possible. $ (USA only)
J (Canada only)
The red brake warning
lamp comes on while
the engine is running
and an acoustic
warning sounds. There is insufficient brake fluid in the reservoir.
Risk of accident!
X
Do not drive any further. Stop the vehicle in a safe location as
soon as it is safe to do so.
X Engage the electronic parking brake.
X Read and observe messages that may appear in the
multifunction display (Y

page 414).
X Contact an authorized Mercedes-Benz Center.
Do not add brake fluid! This will not solve the problem. G
Warning!
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. Do not 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.
! If you

find that the brake fluid in the brake
fluid reservoir has fallen to the minimum
mark or below, have the brake system
checked for brake pad thickness and leaks. What to do if …
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