2008 MERCEDES-BENZ CLK350 engine oil

492 Technical data
Fuels, coolants, lubricants, etc.
Premium unleaded gasolineFuel requirements
Only use premium unleaded fuel:

The octane number (posted at the
pump) must be 91 min. It is an average
of both the Research Octane Number
(RON) and the Motor Octane Number
(MON): (RON+MON)/2. This is also
known as the ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not
exceed 10%; MTBE not to exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional co-solvents.
Using mixtures of ethanol and methanol is
not allowed. Gasohol, which contains
10% ethanol and 90% unleaded gasoline,
can be used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.Warning!G
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flame or smoking mate-
rials near gasoline!
Turn off the engine before refueling
Whenever you are around gasoline, avoid in-
haling fumes and skin or clothing contact,
extinguish all smoking materials.
Direct skin contact with fuels and the inha-
lation of fuel vapors can damage your
health.
!To maintain the engine’s durability and per-
formance, premium unleaded gasoline must be
used. If premium unleaded gasoline is not avail-
able and low octane fuel is used, follow these
precautions:

Have the fuel tank only partially filled with
unleaded regular gasoline and fill up with
premium unleaded gasoline as soon as
possible.

Avoid full throttle driving and abrupt
acceleration.

Do not exceed an engine speed of 3 000 rpm
if the vehicle is loaded with a light load such
as two persons and no luggage.

Do not exceed 2/3 of maximum accelerator
pedal position if the vehicle is fully loaded or
operating in mountainous terrain.

494 Technical data
Fuels, coolants, lubricants, etc.
Coolants
The engine coolant is a mixture of water
and anticorrosion / antifreeze, which
provides:

Corrosion protection

Freeze protection

Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection
to approximately -35°F (-37°C) and
corrosion protection.
If the antifreeze mixture is effective
to -35°F (-37°C), the boiling point of the
coolant in the pressurized cooling system
is reached at
approximately 266°F (130°C).The coolant solution must be used year
round to provide the necessary corrosion
protection and increase boil-over protec-
tion. Refer to Maintenance Booklet for re-
placement interval.
Coolant system design and coolant used
determine the replacement interval. The
replacement interval published in the
Maintenance Booklet is only applicable if
MB 325.0 Anticorrosion/Antifreeze solu-
tion or other Mercedes-Benz approved
products of equal specification are used to
renew the coolant concentration or bring it
back up to the proper level.
For information on other Mercedes-Benz
approved products of equal specification,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Center.To provide important corrosion protection,
the solution must be at least 50% anticor-
rosion/antifreeze (equivalent to freeze
protection to approximately -35°F
[-37°C]). If you use a solution that is more
than 55% anticorrosion/antifreeze (freeze
protection to approximately -49°F
[-45°C]), the engine temperature will in-
crease due to the lower heat transfer capa-
bility of the solution. Therefore, do not use
more than this amount of anticorro-
sion/antifreeze.
If the coolant level is low, water and
MB 325.0 Anticorrosion /Antifreeze
should be used to bring it up to the proper
level (have cooling system checked for
signs of leakage). Please make sure the
mixture is in accordance with label instruc-
tions.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you
are not sure about the water quality,
consult an authorized Mercedes-Benz
Center.
!Add premixed coolant solution only. Adding
water and MB 325.0 Anticorrosion/Antifreeze
separately from each other, could cause engine
damage not covered by the Mercedes-Benz
Limited Warranty

502 Index
Roll bars, Lowering 431
Roll bars, Releasing 430
Soft top, Closing 432–439
Trunk lid, Releasing from inside 117
Trunk lid, Unlocking 428
Unlocking/locking
the vehicle 427, 428
Emergency tensioning device see ETD
Emergency, In case of
Battery, Jump starting 467
First aid kit 421
Flat tire, Changing 452
Fuses 472
Hazard warning flasher 135
Roadside Assistance 12, 298
Towing the vehicle 469
Emission control 318
Emission control information label 479
Emission system warranties 10Engine
Belt layout 480
Block heater (Canada only) 363
Break-in recommendations 308
Cleaning 369
Compartment 323
Malfunction indicator lamp 29, 381
Maximum engine speed 481
Message in display 405
Number 479
Starting 51
Starting difficulties 53
Starting with KEYLESS-GO* 52
Starting with SmartKey 52
Technical data 481
Turning off 60
Turning off with KEYLESS-GO* 60
Turning off with SmartKey 60
Engine coolant see CoolantEngine oil 325, 491
Adding 327, 491
Additives 491
Changing 327, 491
Checking level 322, 325
Consumption 325
Filler cap 327
Filler neck 327
Engine oil level 322
ESP
®92
Messages in display 394–395
Warning lamp 384
ETD 80
Safety guidelines 68
Exterior rear view mirrors 47, 186
Exterior view 22, 24

503 Index
F
Filler cap, Engine oil 327
Filler neck, Engine oil 327
First aid kit 421
Flat tire 452
Jacking up the vehicle 459
Lowering the vehicle 462
Minispare wheel 425
Mounting the spare wheel 458
Preparing the vehicle 452
TIREFIT (CLK 63 AMG only) 422
TIREFIT kit* 452
Floormats* 291
Fluids
Brake fluid 322, 491
Engine coolant 322, 494
Engine oil 322, 491
Windshield washer and headlamp
cleaning* system 322, 496
Fog lamps 132, 444
Messages in display 412
Replacing bulbs 444, 445, 448
Front air bags 70
Front lamps see Headlamps
Front passenger front air bag 65, 70
Messages in display 396–399Front passenger front air bag
off indicator lamp 31, 76, 390
Front seat head restraints
see Head restraints
Fuel 321, 489
Additives 493
Automatic transmission fluid 489
Brake fluid 490
Capacities 489
Capacities, Fuel tank 490
Engine coolant 490
Engine oil 489
Filling the tank 320
Fuel display 29
Fuel filler flap and cap 320
Fuel filler flap and cap, Multifunction
display messages 408
Fuel reserve warning lamp 385
Power steering fluid 490
Premium
unleaded gasoline 321, 490, 492
Requirements, Octane rating 492
Technical data 489
Fuel cap
Message in display 382Fuel consumption statistics
After start 167
Resetting 168
Since last reset 168
Fuel filler flap 320
Locking/unlocking 320
Opening 320
Fuel reserve warning lamp 29
Fuel tank
Capacity 490
Filler flap 320
Fuel, Premium
unleaded gasoline 321, 492
Fuels, coolants, lubricants etc.
Capacities 489
Fuses 472
Fuse box (main)
in passenger compartment 472
Fuse box
in engine compartment 473
Fuse box
in trunk 474
Replacing 472

508 Index
Mirrors
Adjusting 47
Antiglare position 185
Auto-dimming 186
Exterior rear view mirrors 47
Interior rear view mirror 47
Mobile phone see Telephone*
MOE tires* see MOExtended system*
MOE* see MOExtended system*
MOExtended system* 463
MOExtended tires* 482
MON 321
Motor Octane Number see MON
MP3 230
Multicontour seat* see
Seats, Multicontour*
Multifunction display 141
Changing settings see
Control system menus and
Control system submenus
Selecting language 158
Symbol messages 403–420
Text messages 394–401Multifunction display messages 392
ABS 394
Battery 403
Brake fluid 404
Brake pads 404
Check engine 405
Coolant 405–407
Engine 405
Engine coolant 405–407
ESP
®394
Fog lamps 412
Front passenger
front air bag 396–399
Fuel cap 408
Gear selector lever 400
Headlamps 411–415
Key, SmartKey 411
KEYLESS-GO* 410
Lamps 413
Lamps, exterior 411–415
License plate lamp 413
Light sensor 411
Low tire pressure 419
Parking brake 404
Parking lamps 412
Roll bars 417Soft top 420
SRS 416
Steering gear oil 417
Tele Aid 418
Telephone* 418
Turn signals 412
Windshield washer fluid 420
Multifunction steering wheel 30, 142
Button operation 142
N
Navigation system* 153
See separate COMAND*
operating instructions
Net, Parcel 286
Neutral gear position,
Automatic transmission 172, 174
New vehicle break-in 308
Night security illumination 132
Normal occupant weight 359
Number, paintwork code 478
Number,
vehicle identification (VIN) 478, 479

509 Index
O
Occupant Classification System see OCS
Occupant distribution 359
Occupant safety 64
Active head restraints 81
Air bags 65
Children and air bags 83
Children in the vehicle 83
ETD 80
Fastening the seat belts 48
Front air bags 70
Front passenger front air bag off
indicator lamp 76, 390
Front side impact air bags 70
Head-thorax air bags 71
Infant and child restraint systems 83
LATCH-type child seat anchors 87
OCS 72
Rear side impact air bags* 70
Rear side-impact air bags* 72
Roll bars 82
Seat belts 48, 77
Seat belts, safety guidelines 68
SRS 64
Window curtain air bags 70OCS 72
Self-test 76
Odometer 29
Oil level see Engine oil, checking level
One-touch gearshifting
Gear selector lever 179
Steering wheel
gearshift control* 180
Operating safety 213
Operating the vehicle outside the
USA or Canada 13
Ornamental moldings, Cleaning 372
Outside temperature see Displays
Overdue maintenance service 365
Overhead control panel 33P
Paintwork code 478
Paintwork, Cleaning 368
Panic alarm 89
Parcel net
Front passenger footwell 286
Parking 59, 312
Over combustible materials 59, 312
Parking assist* see Parktronic system*
(CLK 63 AMG (USA), Canada all vehicles)
Parking brake 53, 59
Message in display 404
Warning sounds 54
Parking lamps 129
Messages in display 412
Replacing bulbs 444, 447, 448
Parktronic system* (Canada only)
Malfunction 274
Range of the sensors 272
Switching on/off 274
Warning indicators 273
Warning sounds 273, 274
Parktronic system* (CLK 63 AMG (USA),
Canada all models) 271
Cleaning system sensors 372
Parts service 476

510 Index
PASS AIR BAG OFF indicator lamp see
Front passenger front
air bag off indicator lamp
Passenger compartment 317
Electrical outlet 291
Interior lighting 136
Interior rear view mirror 47
Main fuse box 472
Parcel net in
front passenger footwell 286
Storage bags, rear side
of the front seats 286
Passenger safety see Occupant safety
Pedals 309
Phone see Telephone
Plastic parts, cleaning 374
Poly-V-belt drive
Layout 480
Positions (Memory function)
see Seats, Power
Power assistance 310
Power seat see Seats, Power
Power tilt/sliding sunroof* 256
Express opening/closing 257
Opening/closing 256
Stopping 258Synchronizing 258
Power washer 368
Power windows 250
Cleaning 373
Convenience closing feature 254
Express opening/closing 251
Opening with soft top switch 255
Operating 250
Rear side windows,
Blocking operation 88
Summer opening feature 253
Synchronizing 252
Practical hints 378
Premium unleaded gasoline 492
Problems
While driving 58
With vehicle 17
Product information 9
Production options weight 359
Program mode see Automatic
transmission, Automatic shift program
Program mode selector switch
Automatic shift program 178
PSI 359
Push-start see Tow-startR
RACETIMER (CLK 63 AMG only) 149
Radio
Operation 221
Search function 165
Selecting stations 151
Selecting stations (satellite*) 152
Radio transmitters 317
Range (distance to empty) 168
Reading lamp 33, 137
Rear bench seat, foldable 281
Rear fog lamp see Fog lamps
Rear lamps see Tail lamps
Rear seat ashtray see Ashtray
Rear seat head restraints see
Head restraints
Rear side windows
Blocking operation 88
Rear side-impact air bags* 72
Rear view mirrors see Mirrors
Rear window defroster 189
Rear window sunshade*
(Canada only) 188
Recommended engine oils
and oil filter 491

513 Index
Ski bag* (Canada only) 276
Loading 278
Luggage cover 276
Removing 280
Ski bag roller blind 276, 280
Unfolding (Cabriolet) 276
Unfolding (Coupe) 277
Unloading and folding 279
Ski bag* roller blind 276
SmartKey see Key, SmartKey
SmartKey with KEYLESS-GO*
see KEYLESS-GO*
Snow chains 363
Snow tires 362
Soft top 259
Cleaning 370
Emergency operations 432–439
Locking after raising/lowering 262
Luggage cover 264
Messages in display 420
Opening/closing 259
Opening/closing, SmartKey 263
Opening/closing,
Soft top switch 260, 261
Wind screen 265
Soft top switch 255, 260Sound system* 213, 217
Spare parts service see Parts service
Spare wheel 425
Bolts 422, 426
Mounting 458
Sizes 486
Speedometer 29, 158
SRS 64, 78
Indicator lamp 29, 65, 387
Message in display 416
Standard display, Selecting display 159
Standing lamps 447, 448
Replacing bulbs 444
Standing water, Driving through 317
Starter switch 27, 38
Positions 38
Starting difficulties, Engine 53
Starting, Engine 51
Status line, Selecting display 159
Steering column 44, 45
Steering gear oil
Message in display 417
Steering wheel 44, 45
Buttons 30
Cleaning 375
Lock 53Steering wheel gearshift control
one-touch gearshifting*
Automatic transmission 180
Stolen Vehicle Recovery services 301
Storage box 285
Storage compartments 285
Armrest, Front 287
Armrest, Rear 287
Cup holder 288
Glove box 285
Parcel net 286
Storage bags 286
Storage box 285
Storing
Tires 333
Sun visors 187
Sunroof* see Power tilt/sliding sunroof*
Sunshade* (Canada only) 188
Supplemental Restraint System see SRS
Symbols used
in this operator’s manual 15