Page 254 of 400

254 OperationEngine compartmentChecking engine oil level with the 
control system
When checking the oil level the vehicle 
must
be parked on level ground
be at normal operating temperature
have been stationary for at least five 
minutes with the engine turned off
To check the engine oil level via the 
multifunction display, do the following:
Turn the SmartKey in the starter switch 
to position2.
The standard display (
page 113) should 
appear in the multifunction display. 
Press buttonk orj on the 
steering wheel until the following 
message is seen in the multifunction 
display:ENGINE OIL LEVEL
MEASURING NOW
MEASURE. CORRECT
ONLY IF VEH. LEVEL
One of the following messages will 
subsequently appear in the indicator:
ENGINE OIL LEVEL
OK
ADD 1.0 Qt. TO
REACH MAX. OIL LEVEL!(Canada: 
1.0 LITER
)
ADD 1.5 Qts. TO
REACH MAX. OIL LEVEL!(Canada: 
1.5 LITERS
)
ADD 2.0 Qts. TO
REACH MAX. OIL LEVEL!(Canada: 
2.0 LITERS
)
If necessary, add engine oil.
For adding engine oil see (
page 255).
More information on engine oil can be 
found in the “Technical data” section 
(
page 349) and (
page 352).
Other display messages
If the SmartKey is not turned to position2 
in the starter switch, the following 
message will appear:
FOR ENGINE OIL LEVEL
SWITCH ON IGNITION!
Switch on the ignition.iIf you want to interrupt the checking 
procedure, press thek orj 
button on the multifunction steering 
wheel. 
     
        
        Page 255 of 400

255 Operation
Engine compartment
If you see the message:OBSERVE WAITING PERIOD
If engine is at normal operating 
temperature, wait five minutes before 
repeating check procedure.
If engine is not yet at normal operating 
temperature, wait 30 minutes before 
repeating check procedure.
If you see the message:
ENGINE OIL LEVEL
NOT WHEN ENGINE ON!
Turn off the engine.
If the engine is at normal operating 
temperature, wait five minutes before 
checking oil.
If the engine is not yet at normal 
operating temperature, you must wait 
30 minutes before checking oil.If there is excess engine oil with the engine 
at normal operating temperature, the 
following message will appear:
ENGINE OIL LEVEL
REDUCE OIL LEVEL
Have excess oil siphoned or drained 
off. Contact your authorized 
Mercedes-Benz Center.
More information on messages in the 
display concerning engine oil can be found 
in the “Practical hints” section 
(
page 291). Adding engine oil!Excess oil must be siphoned or drained 
off. It could cause damage to the 
engine and catalytic converter not 
covered by the Mercedes-Benz Limited 
Warranty.
!Only use approved engine oils. For a 
listing of approved engine oils, refer to 
the Factory Approved Service Products 
pamphlet in your vehicle literature 
portfolio.
In addition, check the oil filler cap for 
important information pertaining to the 
engine oil needing to meet a specific 
Mercedes-Benz specification 
(e.g. MB 229.5). If such information is 
printed on the oil filler cap, only use an 
engine oil from the list of approved 
engine oils in the Factory Approved 
Service Products pamphlet that meets 
the specification indicated on the oil 
filler cap. Using engine oils of other 
specification may cause the FSS to 
incorrectly determine the next service 
interval and will result in engine dam-
age not covered by the Mercedes-Benz 
Limited Warranty. 
     
        
        Page 256 of 400

256 OperationEngine compartmentC 230 Kompressor Sport1Filler cap
Unscrew filler cap1 from filler neck.
Add engine oil as required. Be careful 
not to overfill with oil.
Be careful not to spill any oil when adding. 
Avoid environmental damage caused by oil 
entering the ground or water.
Screw filler cap1 back on filler neck.
C 240 , and C 320 (all models), C 32 AMG1Filler cap
Unscrew filler cap1 from filler neck.
Add engine oil as required. Be careful 
not to overfill with oil.Be careful not to spill any oil when adding. 
Avoid environmental damage caused by oil 
entering the ground or water.
Screw filler cap1 back on filler neck.
More information on engine oil can be 
found in the “Technical data” section 
(
page 349) and (
page 352).
Transmission fluid level
The transmission fluid level does not need 
to be checked. If you notice transmission 
fluid loss or gear shifting malfunctions, 
have an authorized Mercedes-Benz Center 
check the transmission.
!Excess oil must be siphoned or drained 
off. It could cause damage to the 
engine and catalytic converter not 
covered by the Mercedes-Benz Limited 
Warranty.
!Excess oil must be siphoned or drained 
off. It could cause damage to the 
engine and catalytic converter not 
covered by the Mercedes-Benz Limited 
Warranty. 
     
        
        Page 367 of 400

367 Index
A
ABS 23, 72, 361
ABS control 72
Malfunction indicator lamp 274
Messages in display 284
Accelerator position, 
automatic transmission* 147
Accident
In case of 49
Activating
Air conditioning (cooling)
Automatic climate control* 170
Climate control 160
Air recirculation mode
Automatic climate control* 167
Climate control 158
Anti-theft alarm system* 78
Automatic climate control* 163
Central locking (control system) 133
Charcoal filter 169
Climate control 155Climate control system 159
Defrosting
Automatic climate control* 167
Climate control 158
Easy-entry/exit feature* 134
ESP 76
Exterior headlamps 46
Exterior lamps 103
Exterior rear view mirror 
parking position* 150
Hazard warning flasher 106
Headlamps 46
High beams 106
Ignition 31
Immobilizer 52
Rapid seat heating* 98
Rear fog lamp 104, 105
Rear window defroster 153
Residual heat 171
Seat heating* 98
Tow-away alarm* 80
Windshield wipers 48Adding
Coolant 257
Engine oil 255
Additional turn signals 310
Adjustable air vents, 
rear passenger compartment
Automatic climate control* 172
Climate control 161
Adjusting 32
Air distribution
Automatic climate control* 166
Climate control 157
Air volume
Automatic climate control* 166
Climate control 157
Backrest contour 97
Backrest side bolsters 97
Backrest tilt
Manual seat 33
Power seat* 35
Exterior rear view mirrors 38 
     
        
        Page 376 of 400

376 IndexE
Easy-entry/exit feature* 92
Activating 134
Interrupting movement 92, 134
Electrical fuses 332
Electrical system
Technical data 346
Electronic Stability Program see ESP
Emergency call system* 223
Emergency calls
Initiating an emergency call 226
Telephone* 198
With Tele Aid* 224
Emergency operation 
(Limp Home Mode) 147
Emergency operations
Closing sliding/pop-up roof* 309
Locking the vehicle 306
Opening sliding/pop-up roof* 309
Releasing trunk lid from inside 88
Remote door unlock 230
Unlocking the vehicle 305Emergency Tensioning Device see ETD
Emission control 247
Emission control label 338
Ending
A call (telephone*) 139
Engine
Compartment 252
Starting with 
automatic transmission* 44
Starting with 
manual transmission 43
Starting with the SmartKey
Automatic transmission* 44
Manual transmission 43
Technical data 340
Turning off with the SmartKey 52
Engine cleaning 269
Engine compartment 252
Fuse box in 333
Hood 252
Engine malfunction 
indicator lamp 23, 276Engine number 338, 362
Engine oil 253, 352
Adding 255
Additives 352
Checking level 251, 254
Consumption 253
Display messages 254, 291–292
Filler neck
C 230 Kompressor Sport 256
C 240, C 320, and C 32 AMG 256
Messages in display 254, 291–292
Viscosity 362
Engine oil level
Checking 251, 254
ESP 23, 74, 362
Four wheel electronic 
traction system with ESP 77
Messages in display 282–283
Switching off 75
Switching on 76
Synchronizing 282
Warning lamp 277