Page 320 of 505

319 Operation
Engine compartment
Adding engine oil
CLK 350 / CLK 550
1Filler cap
CLK 63 AMG
1Filler 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 472) and (page 474).
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 and oil filters
required for vehicles with Maintenance System
(U.S. vehicles) or FSS (Canada vehicles). For a
listing of approved engine oils and oil filters,
refer to the Factory Approved Service Products
pamphlet in your vehicle literature portfolio, or
contact an authorized Mercedes-Benz Center.
Using engine oils and oil filters of specification
other than those expressly required for the
Maintenance System (U.S. vehicles) or FSS
(Canada vehicles), or changing of oil and oil filter
at change intervals longer than those called for
by the Maintenance System (U.S. vehicles) or
FSS (Canada vehicles) will result in engine or
emission control system damage not covered by
the Mercedes-Benz Limited Warranty.
!Excess oil must be siphoned or drained off.
It could cause damage to the engine and emis-
sion control system not covered by the
Mercedes-Benz Limited Warranty.
Page 473 of 505

472 Technical data
Fuels, coolants, lubricants, etc.
Capacities
Vehicle components and their respective
lubricants must match. Therefore only use
products tested and approved by
Mercedes-Benz.
Please refer to the Factory Approved Ser-
vice Products pamphlet, or inquire at your
Mercedes-Benz Center.
Warning!G
Comply with all valid regulations with
respect to handling, storing, and disposing
of service fluids. Otherwise you could
endanger persons or the environment.
Keep service fluids out of the reach of
children.
For health reasons, you should prevent
service fluids from coming into direct
contact with your eyes or any open wounds.
If a service fluid is swallowed, contact a
physician immediately.
ModelCapacityFuels, coolants, lubricants, etc.
Engine with oil filterCLK 350
CLK 550
CLK 63 AMG8.5 US qt (8.0 l)
9.0 US qt (8.5 l)
9.0 US qt (8.8 l)Approved engine oils
Automatic transmissionCLK 350
CLK 550
CLK 63 AMG9.0 US qt (8.5 l)
9.5 US qt (9.0 l)
9.3 US qt (8.5 l)MB Automatic Transmission Fluid
Rear axleCLK 350
CLK 550
CLK 63 AMG1.16 US qt (1.1 l)
1.27 US qt (1.2 l)
1.27 US qt (1.2 l)Hypoid gear oil SAE 85 W 90
Fuchs Titan EG 5010D
Page 475 of 505

474 Technical data
Fuels, coolants, lubricants, etc.
Engine oils
Engine oils are specifically tested for their
suitability in our engines and durability for
our service intervals. Therefore, only use
approved engine oils and oil filters re-
quired for vehicles with Maintenance
System (U.S. vehicles) or FSS (Canada
vehicles). For a listing of approved engine
oils and oil filters, refer to the Factory Ap-
proved Service Products pamphlet, or
contact an authorized Mercedes-Benz
Center.
Engine oil additives
Do not blend oil additives with engine oil.
They may damage the engine.
Damage or malfunctions resulting from
blending oil additives are not covered by
the Mercedes-Benz Limited Warranty.
Air conditioning refrigerant
R-134a (HFC) refrigerant and special PAG
lubricating oil are used in the air
conditioning system.
Never use R-12 (CFC) or mineral-based
lubricating oil. Otherwise damage to the
system will occur.
!Using engine oils and oil filters of specifica-
tion other than those expressly required for the
Maintenance System (U.S. vehicles. Canada ve-
hicles, depending on vehicle production date) or
FSS (Canada vehicles, depending on vehicle pro-
duction date), or changing of oil and oil filter at
change intervals longer than those called for by
the Maintenance System (U.S. vehicles. Canada
vehicles, depending on vehicle production date)
or FSS (Canada vehicles, depending on vehicle
production date) will result in engine or emission
control system damage not covered by the
Mercedes-Benz Limited Warranty. Please follow Maintenance System
(U.S. vehicles. Canada vehicles, depending on
vehicle production date) or FSS (Canada vehi-
cles, depending on vehicle production date)
recommendations for scheduled oil changes.
Failure to do so will result in engine or emission
control system damage not covered by the
Mercedes-Benz Limited Warranty.
Page 495 of 505

494 Index
Power windows 249
Cleaning 362
Convenience closing feature 253
Express opening/closing 250, 251
Opening with soft top switch 254
Operating 249
Rear side windows,
Blocking operation 86
Summer opening feature 252
Synchronizing 251
Practical hints 365
Premium unleaded gasoline 475
Problems
While driving 57
With vehicle 17
Product information 9
Production options weight 348
Program mode see
Automatic transmission,
Automatic shift program
Program mode selector switch
Automatic shift program 176
PSI 348
Push-start see Tow-startR
RACETIMER (CLK 63 AMG only) 146
Radio
Operation 218
Search function 163
Selecting stations 149
Selecting stations (satellite*) 150
Radio transmitters 309
Range (distance to empty) 166
Reading lamp 31, 135
Rear fog lamp see Fog lamps
Rear lamps see Tail lamps
Rear seat ashtray see Ashtrays
Rear seat head restraints see
Head restraints
Rear side windows
Blocking operation 86
Rear side-impact air bags* 70
Rear view mirrors see Mirrors
Rear window defroster 187
Recommended
engine oils and oil filter 474
Recommended
tire inflation pressure 348
Recovery services,
Stolen vehicle (Tele Aid) 293Refrigerant, Air conditioning 474
Refueling 312
Regular checks 314
Reminder, Seat belt see Seat belts, Telltale
Remote control
SmartKey 98, 102
SmartKey with KEYLESS-GO* 101
Remote door unlock (Tele Aid) 292
Removing
Ski sack* (Canada only) 274
Replacing bulbs 427
Additional turn signals 428, 429
Backup lamps 428
Brake lamps 428
Corner-illuminating
front fog lamps* 428, 429
Fog lamps 428
Headlamp bulbs 430
Headlamps 428
High beam flasher
(Bi-Xenon*) 428, 431
High beam flasher
(Halogen) 428, 430
High beam headlamps
(Bi-Xenon*) 428, 431