2006 MERCEDES-BENZ CLK500 technical data

482 Technical dataFuels, 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.

483 Technical data
Fuels, coolants, lubricants, etc.
Gasoline additives
A major concern among engine manufac-
turers is carbon build-up caused by gaso-
line. Mercedes-Benz recommends only the
use of quality gasoline containing additives
that prevent the build-up of carbon depos-
its.
After an extended period of using fuels
without such additives, carbon deposits
can build up especially on the intake valves
and in the combustion area, leading to en-
gine performance problems such as:

Warm-up hesitation


Unstable idle


Knocking/pinging


Misfire


Power lossIn areas where carbon deposits may be en-
countered due to lack of availability of gas-
olines which contain these additives,
Mercedes-Benz recommends the use of
additives approved by us for use on
Mercedes-Benz vehicles. Refer to Factory
Approved Service Products pamphlet for a
listing of approved product(s). Follow di-
rections on product label.
Do not blend other fuel additives with fuel.
This only results in unnecessary cost and
may be harmful to the engine operation.Damage or malfunction resulting from
poor fuel quality or from blending addition-
al fuel additives other than those tested
and approved by us for use on
Mercedes-Benz vehicles listed in the
Factory Approved Service Products pam-
phlet are not covered by the
Mercedes-Benz Limited Warranty.

484 Technical dataFuels, 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 -22°F (-30°C) and
corrosion protection.
If the antifreeze mixture is effective
to -22°F (-30°C), the boiling point of the
coolant in the pressurized cooling system
is reached at approx. 266°F (130°C).The coolant solution must be used
year-round to provide the necessary corro-
sion protection and increase boil-over pro-
tection. Refer to Maintenance Booklet for
replacement 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 (see Facto-
ry Approved Service Products pamphlet)
are used to renew the coolant concentra-
tion or bring it back up to the proper level.To provide important corrosion protection,
the solution must be at least 45% anticor-
rosion/antifreeze (equivalent to freeze
protection to approx. -22°F [-30°C]). If you
use a solution that is more than 55% anti-
corrosion/antifreeze (freeze protection to
approx. -49°F [-45°C]), the engine temper-
ature will increase due to the lower heat
transfer capability of the solution. There-
fore, do not use more than this amount of
anticorrosion/antifreeze.
If the coolant level is low, water and MB
Anticorrosion /Antifreeze should be used
to bring it up to the proper level (have cool-
ing system checked for signs of leakage).
Please make sure the mixture is in accor-
dance with label instructions.
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.

485 Technical data
Fuels, coolants, lubricants, etc.
Anticorrosion/antifreeze
Your vehicle contains a number of alumi-
num parts. The use of aluminum compo-
nents in motor vehicle engines
necessitates that anticorrosion/antifreeze
coolant used in such engines be specifical-
ly formulated to protect the aluminum parts. (Failure to use such anticorro-
sion/antifreeze coolant will result in a sig-
nificantly shortened service life.)
Therefore, the following product is strongly
recommended for use in your vehicle:
Mercedes-Benz 325.0 Anticorrosion/Anti-
freeze agent.Before the start of the winter season (or
once a year in hot southern regions), you
should have the anticorrosion/antifreeze
concentration checked. The coolant is also
regularly checked each time you bring your
vehicle to an authorized Mercedes-Benz
Center for service.
Anticorrosion/antifreeze quantityModel
Approx. freeze protection–35°F (–37°C)
–49°F (–45°C)
CLK 350
3.75 US qt (3.55 l)
4.1 US qt (3.9 l)
CLK 500
6.4 US qt (6.0 l)
7.0 US qt (6.6 l)
CLK 55 AMG
6.4 US qt (6.0 l)
7.0 US qt (6.6 l)

486 Technical dataFuels, coolants, lubricants, etc.Windshield washer system and headlamp cleaning system*
Both the windshield washer and headlamp
cleaning system are supplied from the
windshield washer fluid reservoir.
The washer fluid reservoir has a capacity of
approx. 6.4 US qt (6.0 l).

Refill the reservoir with MB Windshield
Washer Concentrate “S” and water (or
concentrate and commercially avail-
able premixed windshield washer
solvent / antifreeze, depending on
ambient temperatures).Windshield and headlamp washer fluid
mixing ratio
For temperatures above freezing point, use
MB Windshield Washer Concentrate “S”
and water:


1 part “S” to 100 parts water
(1.34 fl oz [40 ml] “S” to 1 gallon [4.0 l]
water)
For temperatures below freezing point, use
MB Windshield Washer Concentrate “S”
and commercially available premixed
windshield washer solvent / antifreeze:


1 part “S” to 100 parts solvent
(1.34 fl oz [40 ml] “S” to 1 gallon [4.0 l]
solvent)
Warning!
G
Washer solvent/antifreeze is highly flam-
mable. Do not spill washer
solvent/antifreeze on hot engine parts, be-
cause it may ignite and burn. You could be
seriously burned.

487 Technical terms
ABS
(A
ntilock B
rake S
ystem)
Prevents the wheels from locking up
during braking so that the vehicle can
continue to be steered.
Accessory weight
(
page 355)
Air pressure
(page 355)
Alignment bolt
Metal pin with thread. The centering
pin is an aid used when changing a tire
to align the wheel with the wheel hub.
Aspect ratio
(page 355)
Bar
(page 355)
BAS
(Brake A
ssist S
ystem)
System for potentially reducing braking
distances in emergency braking situa-
tions. The system is activated when it
senses an emergency based on how
fast the brake is applied.Bead
(
page 355)
Bi-Xenon headlamps*
Headlamps which use an electric arc as
the light source and produce a more in-
tense light than filament headlamps.
Bi-Xenon headlamps produce low
beam and high beam.
CAC
(Customer A
ssistance C
enter)
Mercedes-Benz customer service cen-
ter, which can help you with any ques-
tions about your vehicle and provide
assistance in the event of a break-
down.
CAN system
(C
ontroller A
rea N
etwork)
Data bus network serving to control ve-
hicle functions such as door locking or
windshield wiping.Cockpit
All instruments, switches, buttons and
indicator/warning lamps in the passen-
ger compartment needed for vehicle
operation and monitoring.
Cold tire inflation pressure
(
page 355)
COMAND
(Cockpit M
anagement and D
ata Sys-
tem)
Information and operating center for
vehicle sound and communications
systems, including the radio and the
navigation system, as well as other op-
tional equipment (CD changer*, tele-
phone, etc.).
Control system
The control system is used to call up
vehicle information and to change
component settings. Information and
messages appear in the multifunction
display. The driver uses the buttons on
the multifunction steering wheel to
navigate through the system and to ad-
just settings.

497 Index
Drinking and driving 307
Driving
Abroad 315
Hydroplaning 311
In winter 313
Instructions 45, 307
Problems 56
Safety systems 87
Systems 265
Through standing water 314
Driving off 310
Driving safety systems
ABS 87
BAS 88
ESP
®
89
Driving systems
Cruise control 265
Parktronic system*
(Canada only) 269
E
Easy-entry/exit feature 42, 160
Electrical fuses see Fuses
Electrical outlet 287
Electrical system, Technical data 477
Electronic Stability Program see ESP
®
Emergency call system* 289Emergency calls
911 calls 247
Tele Aid calls 290, 291
Emergency operation
(Limp Home Mode) 180
Emergency operations
Active head restraints, Resetting 434
Center console,
Indicator lamps 381–382
Gear selector lever, Unlocking 422
Instrument cluster,
Indicator lamps 374–380
Remote door unlock 295
Roll bars, Lowering 424
Roll bars, Releasing 423
Soft top, Closing 425–433
Trunk lid, Releasing from inside 115
Trunk lid, Unlocking 420
Unlocking/locking
the vehicle 419, 420
Emergency tensioning device see ETD
Emergency, In case of
Battery,Jump starting 292, 456
First aid kit 413
Flat tire, Changing 446
Fuses 462Hazard warning flasher 133
Roadside Assistance 12
Towing the vehicle 458
Emission control 316
Emission control information label 468
Emission control vacuum line
routing diagram label 468
Emission system warranties 10
Engine
Belt layout 469
Block heater (Canada only) 360
Break-in recommendations 306
Cleaning 366
Compartment 321
Malfunction indicator lamp 25, 376
Maximum engine speed 470
Messages in display 397
Number 468, 488
Starting 48
Starting difficulties 50
Starting with KEYLESS-GO* 49
Starting with SmartKey 49
Technical data 470
Turning off 58
Turning off with KEYLESS-GO* 59
Turning off with SmartKey 58

498 IndexEngine coolant see Coolant
Engine oil 322, 481
Adding 325, 481
Additives 481
Changing 325, 481
Checking level 320
Checking level (Dipstick) 324
Consumption 322
Filler cap 326
Filler neck 326
Messages in display 323, 401
Viscosity 488
Engine oil level 320, 323
ESP
®
25, 89, 488
Messages in display 387–388
Warning lamp 378
ETD 72, 488
Safety guidelines 66
Exterior rear view mirrors 43, 181
Parking position 161, 183F
Filler cap, Engine oil 326
Filler neck, Engine oil 326
First aid kit 413
Flat tire 446
Jacking up the vehicle 447
Lowering the vehicle 451
Minispare wheel 416
Mounting the spare wheel 447
Preparing the vehicle 446
Flexible Service System see FSS
(Canada vehicles)
Floormats* 287
Fluids
Brake fluid 320, 481
Engine coolant 327, 484
Engine oil 322, 481
Transmission fluid 326
Windshield washer and headlamp
cleaning* system 329, 486
Fog lamps 131, 439
Messages in display 405
Replacing bulbs 438, 439, 443
Front air bags 67
Front lamps see HeadlampsFront passenger front air bag 63, 67
Messages in display 389–392
Front passenger front
air bag off indicator lamp 27, 81, 381
FSS (Canada vehicles) 361, 488
Fuel 319, 479
Additives 483
Automatic transmission fluid 479
Brake fluid 479
Capacities 479
Capacities, Fuel tank 480
Engine coolant 480
Engine oil 479
Filling the tank 318
Fuel display 25
Fuel filler flap and cap 318, 421
Fuel filler flap and cap, Multifunction
display messages 400
Fuel reserve warning lamp 379
Power steering fluid 479
Premium
unleaded gasoline 319, 480, 482
Requirements, Octane rating 482
Technical data 479
Fuel cap
Message in display 376