2006 MERCEDES-BENZ CLK COUPE octane

13 Introduction
Operator’s Manual
Operating your vehicle outside the USA or Canada
If you plan to operate your vehicle in for-
eign countries, please be aware that:

service facilities or replacement parts
may not be readily available,


unleaded gasoline for vehicles with cat-
alytic converters may not be available;
the use of leaded fuels will damage the
catalysts,


gasoline may have a considerably low-
er octane rating, and improper fuel can
cause engine damage.Certain Mercedes-Benz models are avail-
able for delivery in Europe under our Euro-
pean Delivery Program. For details, consult
an authorized Mercedes-Benz Center or
write to:
In the USA:
Mercedes-Benz USA, LLC
European Delivery Department
One Mercedes Drive
Montvale, NJ 07645-0350
In Canada:
Mercedes-Benz Canada Inc.
European Delivery Department
98 Vanderhoof Avenue
Toronto, Ontario M4G 4C9

306 OperationAt the gas station
Take off cap and set it in the direction
of arrow 2 in the recess on the fuel fill-
er flap.
To prevent fuel vapors from escaping
into open air, fully insert filler nozzle
unit.

Only fill your tank until the filler nozzle
unit cuts out – do not top up or
overfill.

Replace fuel cap by turning it clockwise
until it audibly engages.

Close fuel filler flap.Warning!
G
Overfilling of the fuel tank may create
pressure in the system which could cause a
gas discharge. This could cause the gas to
spray back out when removing the fuel
pump nozzle, which could cause personal
injury.
iOnly use premium unleaded gasoline
with a minimum Posted Octane Rating
of 91 (average of 96 RON / 86 MON).
Information on gasoline quality can
normally be found on the fuel pump.
For more information on gasoline, see
“Premium unleaded gasoline”
(page 455) or the Factory Approved
Service Products pamphlet.
iLeaving the engine running and the fuel
cap open can cause theú malfunc-
tion indicator lamp (USA only) or
the± malfunction indicator lamp
(Canada only) to illuminate.
More information can be found in the
“Practical hints” section (
page 362).


444 Technical dataEngineModel
CLK 350 (209.356)
1
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all special bodies and special equipment.
CLK 500 (209.375)
1
Engine
272
113
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
6
8
Bore
3.66 in (92.90 mm)
3.82 in (97.00 mm)
Stroke
3.39 in (86.00 mm)
3.31 in (84.00 mm)
Total piston displacement
213.5 cu in (3 498 cm
3)
303.0 cu in (4 966 cm
3)
Compression ratio
10.5:1
10:1
Output acc. to SAE J 1349
268 hp / 6 000 rpm
2
(200 kW / 6 000 rpm)
2Premium fuel required. Performance may vary with fuel octane rating.
302 hp / 5 600 rpm
2
(225 kW / 5 600 rpm)
Maximum torque acc. to SAE J 1349
258 lb-ft/ 2 400 - 5 000 rpm
(350 Nm / 2 400 - 5 000 rpm)
339 lb-ft / 2 700 - 4 250 rpm
(460 Nm /2 700 - 4 250 rpm)
Maximum engine speed
6300 rpm
6 300 rpm
Firing order
1-4-3-6-2-5
1-5-4-2-6-3-7-8
Poly-V-belt
2404 mm
2 380 mm

453 Technical data
Fuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
Cooling system
CLK 350
CLK 500
approx. 10.5 US qt (10.0 l)
approx. 12.8 US qt (12.0 l)
MB 325.0 Anticorrosion/Antifreeze
Agent
Fuel tank
including a reserve of
16.35 US gal (62.0 l)
2.11 US gal (8.0 l)
Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg.of96RON/86MON)
Air conditioning system
R-134a refrigerant and special PAG lu-
bricant oil (never R-12)
Windshield washer and
headlamp cleaning system*
6.4 US qt (6.0 l)
MB Windshield Washer Concentrate
1
1Use MB Windshield Washer Concentrate “MB SummerFit” and water for temperatures above freezing point or MB Windshield Washer Concentrate “MB SummerFit”
and commercially available premixed windshield washer solvent / antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 459).

455 Technical data
Fuels, coolants, lubricants, etc.
Premium unleaded gasoline
Fuel 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 (R) octane num-
ber and the Motor (M) octane number:
(R+M) / 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 cosolvents.
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
injury. Whenever you are around gasoline,
avoid inhaling fumes and skin contact, extin-
guish all smoking materials. Never allow
sparks, flame or smoking materials near
gasoline!
!To maintain the engine’s durability and
performance, premium unleaded gaso-
line must be used. If premium unleaded
is not available and low octane fuel is
used, follow these precautions:

Have the fuel tank only partially
filled with unleaded regular and fill
up with premium unleaded 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 per-
sons and no luggage.


Do not exceed
2/3 of maximum ac-
celerator pedal position if the vehi-
cle is fully loaded or operating in
mountainous terrain.

463 Technical terms
Instrument cluster
The displays and indicator/warning
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer,
coolant temperature indicator and fuel
display.
KEYLESS-GO*
System for entering and operating the
vehicle without the use of a SmartKey.
Kickdown
Depressing the accelerator past the
point of resistance shifts the transmis-
sion down to the lowest possible gear.
This very quickly accelerates the vehi-
cle and should not be used for normal
acceleration needs.
Kilopascal (kPa)
(
page 343)
Locking knob
Knob on the door which indicates
whether the door is locked or un-
locked. Pushing the locking knob down
on the driver’s or passenger door from
inside will lock that door.Maintenance System (U.S. vehicles)
Maintenance service indicator in the
multifunction display that informs the
driver when the next vehicle mainte-
nance service is due. The Maintenance
System in your vehicle tracks distance
driven and the time elapsed since your
last maintenance service, and calls for
the next maintenance service
accordingly.
Maximum load rating
(
page 343)
Maximum loaded vehicle weight
(page 343)
Maximum tire inflation pressure
(page 343)
Memory function*
Used to store three individual seat,
steering wheel and exterior mirror
positions.Menu
The control system displays are ar-
ranged in menus. Each menu contains
a number of commands for particular
systems.
MON
(M
otor O
ctane N
umber)
The Motor Octane Number for gasoline
as determined by a standardized meth-
od. It is an indication of a gasoline's
ability to resist undesired detonation
(knocking). The average of both the
MON (Motor Octane Number) and
->RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
MOE
(M
ercedes-Benz O
riginal E
xtended
equipment tires)
Tires with limited run-flat characteris-
tics. The MOExtended system allows
you to continue driving your vehicle
even if there is a total loss of pressure
in one or more tires.

465 Technical terms
Recommended tire inflation pressure
(
page 343)
REST*
(Residual engine heat utilization)
Feature that uses the engine heat
stored in the coolant to heat the vehi-
cle interior for a short time after the en-
gine has been turned off.
Restraint systems
Seat belts, child restraints, lower an-
chors and tethers for children (LATCH).
As independent systems, their protec-
tive functions complement one anoth-
er.
Rim
(page 343)RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
Run Flat Indicator*
The Run Flat Indicator monitors the set
tire inflation pressures by evaluating
each wheel’s rotational speed. If a
wheel’s rotational speed changes due
to falling tire inflation pressure, a corre-
sponding warning message appears in
the multifunction display.Shift lock
When the vehicle is parked, this lock
prevents the gear selector lever from
being inadvertently moved out of
positionP without SmartKey turned
and brake pedal depressed.
Sidewall
(
page 343)
SRS
(Supplemental R
estraint S
ystem)
Air bags, air bag control unit (with
crash sensor), emergency tensioning
device. Though independent systems,
they are closely interfaced to provide
effective occupant protection.
Steering wheel gearshift control
You can change the gears yourself with
the steering wheel gearshift buttons.

473 Index
F
Filler cap, Engine oil 313
Filler neck, Engine oil 313
First aid kit 398
Flat tire 420
Jacking up the vehicle 421
Lowering the vehicle 424
Minispare wheel 401
Mounting the spare wheel 421
Preparing the vehicle 420
Flexible Service System see
FSS (Canada vehicles)
Floormats* 277
Fluids
Brake fluid 307, 454
Engine coolant 307
Engine oil 307, 454
Windshield washer and headlamp
cleaning* system 307, 453
Fog lamps 134, 413
Messages in display 392
Replacing bulbs 412, 413, 417
Front air bags 67
Front lamps see Headlamps
Front passenger front air bag 63, 67
Messages in display 376–379Front passenger front
air bag off indicator lamp 27, 81, 368
Front seat head restraints see
Head restraints
FSS (Canada vehicles) 348, 462
Fuel 306, 453
Additives 456
Automatic transmission fluid 452
Brake fluid 452
Capacities 452
Capacities, Fuel tank 453
Engine coolant 453
Engine oil 452
Filling the tank 305
Fuel display 25
Fuel filler flap and cap 305
Fuel filler flap and cap, Multifunction
display messages 387
Fuel reserve warning lamp 365
Power steering fluid 452
Premium
unleaded gasoline 306, 453, 455
Requirements, Octane rating 455
Technical data 453
Fuel cap
Message in display 363Fuel consumption statistics
After start 165
Resetting 166
Since last reset 166
Fuel filler flap 305
Locking/unlocking 305
Opening 305
Fuel reserve warning lamp 25
Fuel tank
Capacity 453
Filler flap 305
Message in display 390
Fuel, Premium
unleaded gasoline 306, 453, 455
Fuels, coolants, lubricants etc.
Capacities 452
Fuses 436
Aids for changing fuses 436
Fuse box (main)
in passenger compartment 437
Fuse box in engine compartment 437
Fuse box in trunk 438
Fuse chart 436
Fuse extractor 436
Replacing 436
Spare fuses 436