Page 289 of 464

289 Operation
Engine compartment
Checking engine oil level with the con-
trol 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 or press the 
KEYLESS GO* start/stop button twice.The standard display (
page 129) should 
appear in the multifunction display.
Press buttonk or j on the 
steering wheel until the following 
message is seen in the multifunction 
display:Engine oil level 
Measuring now!
Measurement
correct
only if veh. levelOne 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 qt.
to reach max. oil level!(Canada: 
1.5 liter
)
Add 2.0 qt.
to reach max. oil level!(Canada: 
2.0 liter
)
If necessary, add engine oil.
For adding engine oil see (
page 291).
More information on engine oil can be 
found in the “Technical data” section 
(
page 410) and (
page 412).
iIf you want to interrupt the checking 
procedure, press thek orj 
button on the multifunction steering 
wheel. 
     
        
        Page 291 of 464

291 Operation
Engine compartment
Adding engine oil
1Filler cap
Unscrew filler cap1 from filler neck. 
Be careful not to overfill with oil.
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.
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 automatic transmission.
!Only use approved engine oils. For a 
listing of a approved engine oils, refer 
to the Factory Approved Service Prod-
u c t s  p a m p hl e t  i n  y o u r  v e h i c l e  l i t e r a t u r e  
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 Prod-
ucts pamphlet that meets the specifi-
cation indicated on the oil filler cap. 
Using engine oils of other specification 
may cause the FSS to incorrectly deter-
mine the next service interval and will 
result in engine damage not covered by 
the Mercedes-Benz Limited Warranty. 
!Excess oil must be siphoned or drained 
off. It could cause damage to the en-
gine and catalytic converter not cov-
ered by the Mercedes-Benz Limited 
Warranty. 
     
        
        Page 427 of 464

427 Index
A
ABS 23, 77, 419
Malfunction indicator lamp 312
Messages in display 321
Accelerator position, 
automatic transmission 163
Accident
In case of 51
Activating
Air conditioning (cooling) 181
Air recirculation mode 178
Anti-theft alarm system 83
Automatic climate control 173
Central locking (control system) 149
Charcoal filter 179
Distance warning function* 238
Distronic* 233, 234
Easy-entry/exit feature 150
ESP 81
Exterior headlamps 47
Exterior lamps 120
Exterior rear view 
mirror parking position 169
Front and rear fog lamp 121, 122
Hazard warning flasher 123
Headlamps 47High beams 123
Ignition 31
Ignition with KEYLESS-GO* 33
Immobilizer 54, 82
Manual shift programm 
CLK 55 AMG 164
Rear window defroster 171
Residual heat 181
Seat ventilation* 113
Steering wheel gearshift 
control (CLK 55 AMG) 164
Tow-away alarm 85
Windshield wipers 49
Adding
Coolant 292
Engine oil 291
Additional turn signals 373
Adjustable air vents, 
rear passenger compartment 182Adjusting 34
Air distribution 176
Air volume 177
Backrest tilt 36
Exterior rear view mirror 39
Head restraint height 36
Head restraint tilt 36
Instrument cluster illumination 126
Interior rear view mirror 38
Mirrors 38
Multicontour seat* 112
Seat cushion depth 112
Seat cushion tilt 36
Seat fore and aft adjustment 35
Seat height 36
Seats 34
Steering column in/out 38
Steering column up/down 38
Steering wheel 37
Air conditioning (cooling)
Turning off 181
Turning on 181
Air conditioning refrigerant 412
Air distribution
Adjusting 176 
     
        
        Page 436 of 464

436 IndexEmission control 282
Emission control label 400
Ending
A call (telephone*) 155
Engine
Compartment 287
Message in display 314
Starting 44
Starting with KEYLESS-GO* 44
Starting with the SmartKey 44
Technical data 402
Turning off 54
Engine cleaning 306
Engine compartment 287
Fuse box in 395
Hood 287
Engine malfunction 
indicator lamp 23, 314
Engine number 421Engine oil 288, 412
Adding 291
Additives 412
Checking level 289
Consumption 288
Filler cap 291
Filler neck 291
Message in display 332
Messages in display 290
Viscosity 421
Engine oil level see Oil level
ESP 23, 79, 421
Messages in display 324
Switching off 80
Switching on 81
Warning lamp 316, 317
ETD 421
Safety guidelines 62
ETD (Emergency tensioning device) 67
Exterior lamp switch 119
Exterior rear view mirrors
Adjusting 39
Parking position for 151F
Fahrenheit
Setting temperature units 142
Fastening the seat belts 40
Fine adjustment
Cruise control 228
Distronic* 235
First aid kit 343
Flat tire 380
Lowering the vehicle 384
Minispare wheel 346
Mounting the Minispare wheel 380
Preparing the vehicle 380
Flexible Service System (FSS) 302, 421
Floormates*
Installing 255
Removing 255
Floormats* 255
Fog lamp, rear 122, 373
Fog lamps
Replacing bulbs 373
Fog lamps, front
Messages in display 335
Replacing bulbs 374
Switching on 122 
     
        
        Page 443 of 464

443 Index
Roll bar 338
Selector lever 325
SmartKey with KEYLESS-GO* 334
Soft top 340
Steering gear oil level 341
Symbol messages 326–342
Tele Aid 341
Telephone* 342
Text messages 321–325
Trunk 342
Washer fluid 342
Multifunction 
steering wheel 24, 130, 422
Buttons 130
N
Navigation system
Operating 137
See separate COMAND* 
operating instructions
Night security illumination 121
Nubuck leather upholstery (CLK 55 AMG)
Cleaning 310O
Occupant safety 58
Airbags 59
Children and airbags 60
Children in the vehicle 69
Fastening the seat belts 40
Infant and child restraint systems 69
LATCH child seat anchors 73
Seat belts 40, 62
Odometer, main 23
Oil
Adding 291
Checking level 289
Consumption 288
Filler cap 291
Filler neck 291
Viscosity 421
Oil level
Checking 286
One-touch gearshifting 158
Canceling gear range limit 158
Downshifting 158
Upshifting 158Opening
Ashtray (Center console) 253
Ashtray (Rear seat) 254
Cup holder 251
Doors from the inside 97
Fuel filler flap 284
Fuel filler flap manually 352
Glove box 250
Hood 287
Side windows 211
Ski sack roller blind* 217, 245
Soft top 215
Soft top (SmartKey) 222
Soft top (switch) 218
Trunk 98
Trunk from the inside 99
Windows 210
Windows with SmartKey 213
Windows with soft top switch 212