Page 244 of 330
241 Malfunction and warning messages
Technical
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 79.
Line 1 Line 2
STEER. WHEEL ADJUST.
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        Page 245 of 330

242 Malfunction and warning messages
Technical
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 114
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 114.
4 The engine oil level has dropped to a critical level. 
Check the engine oil level immediately. See engine oil level 
ind icator on  page 114 an d check the en gin e for  visible leakage (los s 
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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        Page 322 of 330

319 Index
Technical
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car careIndex
KKeys, changing battery  ................................................. 283
Keys, vehicle  ..................................................................... 24LLamps, exterior  .............................................................. 275
Fog lamps  ....................................................................116
Headlamp, adjusting  ................................................280
Headlamps  ...................... 116, 240, 241, 276, 280, 294
Low and high beam  .......................................... 119, 277
Parking lamp  ..................................................... 116, 277
Replacing bulbs ......................................................... 275
Side marker lamp, front  ........................................... 279
Standing lamp  ................................................... 116, 277
Taillamp assemblies  ......................................... 116, 278
Turn signal lamp  ............................................... 119, 277
Layout of poly-V-belt drive ............................................ 300
LIGHT SENSOR - malfunction 
and warning messages  ............................................ 241
Lighter  ............................................................................. 159
LIGHTING SYSTEM - malfunction 
and warning messages  ............................................ 240
Limp home mode (Automatic transmission)  ............. 201
Loading instructions  ..................................................... 162Locking and unlocking .................................................... 29
Low engine coolant level warning  .............................. 238
MMaintenance  ................................................................... 177
Malfunction and indicator lamps 
in the instrument cluster  ........................................ 226
Malfunction and warning messages  .......................... 232
ABS-SYSTEM  ............................................................. 235
BATTERY/ALTERNATOR  ......................................... 234
BRAKE ASSIST  ......................................................... 235
BRAKE FLUID  ........................................................... 236
BRAKE LINING WEAR  ............................................ 236
COOLANT (coolant level)  ........................................ 238
COOLANT TEMP. 
(coolant temperature)  ......................................... 239
DISPLAY DEFECTIVE 
(engine control unit) ........................................... 233
DISPLAY DEFECTIVE 
(several systems)  ................................................. 233
ELEC. STABIL. PROGR.  ............................................ 243
ENGINE FAN  ............................................................. 237
ENGINE OIL LEVEL  ................................................. 242
LIGHT SENSOR .......................................................... 241
LIGHTING SYSTEM  .................................................. 240
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        Page 324 of 330

321 Index
Technical
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car careIndex Power windows ............................................................... 147
Express opening  ....................................................... 148
Opening and closing  .................................................. 31
Synchronizing  ........................................................... 148
Problems with your vehicle  ........................................... 14
Product information  .......................................................... 7
RRadio
See Audio  ................................................................... 135
Radio transmitters  ..........................................................176
Rain sensor  ..................................................................... 120
Rear seats
Split folding backrest  ............................................... 160
Rear view mirrors
Exterior  ......................................................................... 81
Inside  ............................................................................ 80
Rear window defroster  .................................................. 126
Rear window sunshade  ................................................. 152
Remote control  ................................................................. 27
Battery replacement  ................................................. 283
REMOVE KEY - malfunction and warning messages 243
Replacing bulbs .............................................................. 275
Replacing wiper blade insert  .......................................287Reporting Safety Defects ................................................. 15
Residual engine heat utilization (REST)  .................... 127
Roadside assistance  ......................................................... 10
Roadside assistance call
See Tele Aid  ............................................................... 184
Roof rack ......................................................................... 289
SSafety guidelines for the seat belt, emergency 
tensioning retractor and airbag  ................................ 74
Seat belts  ...........................................................................58
Fastening  ......................................................................60
Seat belt nonusage warning system .........................59
Unfastening  .................................................................. 62
Warning lamp  ........................................................... 230
Seat belts and integrated restraint system (SRS)  .......58
Seats
Backrest  ........................................................................ 54
Front seat adjustment  ................................................ 45
Heated  ...........................................................................56
Memory  ........................................................................ 48
Multicontour  ................................................................55
Power seat  ....................................................................45
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