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237 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index COOLANT TEMP. (coolant temperature)
1 Observe coolant temperature gauge, see page 82. 
Check coolant level, see page 253.
This may indicate that the poly-V-belt has broken. Should this 
condition occur, the poly-V-belt must be replaced before continuing 
to operate the vehicle. Otherwise, the engine will overheat due to 
an inoperative water pump which may result in damage to the 
engine. 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.
During severe operating conditions and stop-and-go city 
traffic, the coolant temperature may rise close to the red 
marking.
The engine should not be operated with the coolant 
temperature in the red zone. Doing so may cause 
serious engine damage which is not covered by the 
Mercedes-Benz Limited Warranty.
Line 1 Line 2
COOLANT TEMP. VISIT WORKSHOP!
1
Wa r n i n g !
Driving when your engine is badly 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 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.
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238 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
LIGHTING SYSTEMWhen the message appears after starting the engine, or 
if it comes on while driving, this indicates a failure in 
the parking lamp, taillamp, stop lamp, or low beam 
headlamp. See page 277 for instructions on replacing 
bulbs.
If an exterior lamp fails, the message will appear only 
when that lamp is switched on.
If a brake lamp fails, the message will appear when 
applying the brake and stays on until the engine is 
turned off.
Note:
If additional lighting is installed (e.g. auxiliary 
headlamps etc.) be certain to connect into the fuse 
before the failure indicator monitoring unit order to 
avoid damaging the system.
Line 1 Line 2
LAMP DEFECTIVE CHECK LAMPS!
DISPLAY DEFECTIVE VISIT WORKSHOP!
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239 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index LIGHT SENSOR
With the electronic key removed and the driver’s door 
open, a warning sounds and the message “SWITCH OFF 
LIGHTS!” appears in the multifunction indicator if the 
vehicle’s exterior lamps (except standing lamps) are not 
switched off.STEER. WHEEL ADJUST.
For locking the adjustable telescoping steering column, 
see page 73.
Line 1 Line 2
STEER. WHEEL ADJUST.
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240 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
ENGINE OIL LEVEL
1 The engine oil level must be checked immediately. See Engine oil 
level indicator on page 108
2 There is no oil in the engine. There is a danger of engine damage.3 There is a risk of damaging the engine or catalytic converter. The 
engine oil level must be checked immediately. See Engine oil level 
indicator on page 108.
4 The engine oil level has dropped to a critical level. 
Check the engine oil level immediately. See Engine oil level 
indicator on page 108 and check the engine for visible leakage 
(loss of oil).
5 The measuring system is malfunctioning.
6 It may be that there is water in the engine oil. Have the engine oil 
checked.
When the “ENGINE OIL LEVEL – CHECK LEVEL” 
message appears 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 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.
The 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.
Line 1 Line 2
ENGINE OIL LEVEL CHECK LEVEL!
1
ENGINE OIL LEVEL STOP, ENGINE OFF!
2
ENGINE OIL LEVEL REDUCE OIL LEVEL!
3
ENGINE OIL LEVEL VISIT WORKSHOP!
4
ENGINE OIL SENSOR VISIT WORKSHOP!
5
ENGINE OIL VISIT WORKSHOP!
6
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241 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index ELEC. STABIL. PROG.
(Electronic stability program)
1 A malfunction has been detected in the system. Pressing the 
accelerator pedal will require greater effort. Only partial engine 
output will be available.
2 This message may be displayed if the power supply was 
interrupted (battery disconnected or empty).
3 Synchronize ESP. See page 217
REMOVE KEY
This message plus an audible alarm indicate that the 
electronic key is in steering lock position 0 or 1, and the 
driver’s door is open.
Line 1 Line 2
DISPLAY DEFECTIVE VISIT WORKSHOP!
ELEC. STABIL. PROG. VISIT WORKSHOP!
1,  2 ,  3
Line 1 Line 2
REMOVE KEY!
P54.30-3573-21
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242 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
WA S H E R  F L U I DWhen this message appears while the engine is 
running, the level of the reservoir has dropped to 
approx. 
1/3 of the total volume. The reservoir should be 
refilled with the prescribed mixture of MB Windshield 
Washer Concentrate “S” and water or the Concentrate 
and commercially available premixed windshield 
washer solvent/antifreeze, depending on ambient 
temperature, at the next opportunity. The reservoir for 
the windshield and headlamp washer systems is located 
in the engine compartment.
See windshield washer system on page 255 for 
instructions on adding washer fluid.
Line 1 Line 2
WASHER FLUID CHECK LEVEL!
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        Page 246 of 341
243 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index TELE AID
1 When this message appears, a malfunction has been detected in 
the Tele Aid system. In some cases it may not be possible to initiate 
an Emergency, Roadside Assistance or Information call.
See page 178 for notes on the Tele Aid.If a malfunction is indicated as outlined above, have the 
system checked at the nearest Mercedes-Benz Center as 
soon as possible.Line 1 Line 2
TELE AID VISIT WORKSHOP!
1
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245
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
Practical hintsFirst aid kit  .....................................246
Shelf below rear window  ..............246
Stowing things in the vehicle  ......246
Luggage cover .................................246
Fuses ................................................248
Hood .................................................250
Checking engine oil level  .............252
Automatic transmission fluid
level .............................................253
Coolant level  ...................................253
Adding coolant  ...........................254
Windshield washer / headlamp 
cleaning system .........................255
Windshield and headlamp washer 
fluid mixing ratio  .......................255Spare wheel, vehicle tools, storage 
compartment ............................. 256
Vehicle jack  .................................... 257
Wheels ............................................ 258
Tire replacement  ....................... 258
Rotating wheels  ......................... 259
Spare wheel .................................... 260
Spare wheel bolts  .......................... 260
Spare wheel bolts  ...................... 260
Spare wheel .................................... 260
Changing wheels ........................... 263
Tire inflation pressure  ................. 268
Battery ............................................. 270
Jump starting  ..................................271
Towing the vehicle  ........................ 273
Exterior lamps  ............................... 277
Headlamp assembly  .................. 278
Taillamp assemblies  .................. 280Adjusting headlamp aim ...............282
Changing batteries in the electronic 
key ...............................................285
Synchronizing remote
control  .........................................287
Raising soft top manually .............288
Antenna ...........................................295
Manual release for fuel filler
flap ..............................................296
Replacing wiper blade insert  .......296
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