maintenance MERCEDES-BENZ C COUPE 2005 CL203 Owner's Guide

396 Practical hintsFlat tireThe jack take-up brackets are located
directly behind the front wheel housings
and in front of the rear wheel housings.
1Jack
2Crank
3Take-up bracket
Place jack on firm ground.

Position jack1 under the take-up
bracket3 so that it is always vertical
(plumb-line) as seen from the side,
even if the vehicle is parked on an
incline.

Jack up the vehicle until the wheel is a
maximum of 1.2 in (3 cm) from the
ground. Never start engine while vehi-
cle is raised.Removing the wheel
1Alignment bolt

Unscrew upper-most wheel bolt and
remove.

Replace this wheel bolt with the align-
ment bolt1 supplied in the tool kit.

Remove the remaining bolts.

Remove the wheel.
Warning!
G
The jack is intended only for lifting the
vehicle briefly for wheel changes. It is not
suited for performing maintenance work un-
der the vehicle.

Never start the engine when the vehicle
is raised.


Never lie down under the raised vehicle.
!Do not place wheel bolts in sand or dirt.
This could result in damage to the bolt
and wheel hub threads.

401 Practical hints
Battery
Battery
The battery is located in the engine com-
partment on the right hand side.
1Clamps
Removing filter box
Release clamps1.

Remove filter box.
Installing filter box

Insert filter box properly.

Secure it with clamps1.
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Observe all safety instructions and precau-
tions when handling automotive batteries
(page 297).
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.
!Never loosen or detach battery termi-
nal clamps while the engine is running
or the SmartKey is in the starter switch.
Otherwise the alternator and other
electronic components could be se-
verely damaged.
Have the battery checked regularly by
an authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for main-
tenance intervals or contact an autho-
rized Mercedes-Benz Center for further
information.Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.


419 Technical data
Rims and Tires
Rims and Tires
Use only tires and rims which have been
specifically developed for your vehicle and
tested and approved by Mercedes-Benz.
Other tires and rims can have detrimental
effects, such as

poor handling characteristics


increased noise


increased fuel consumption
!Moreover, tires and rims not approved
by Mercedes-Benz may, under load, ex-
hibit dimensional variations and differ-
ent tire deformation characteristics
that could cause them to come into
contact with the vehicle body or axle
parts. This may result in damage to the
tires or the vehicle.
iFurther information on tires and rims is
available at any authorized
Mercedes-Benz Center. A placard with
the recommended tire inflation
pressures is located on the driver’s
door B-pillar. Some vehicles may have
supplemental tire inflation pressure
information for driving at high speeds
(page 310) or for vehicle loads less
than the maximum loaded vehicle con-
dition. If such information is provided,
it can be found on the placard located
on the inside of the fuel filler flap. The
tire inflation pressure should be
checked regularly and should only be
adjusted on cold tires. Follow tire
manufacturer’s maintenance recom-
mendation included with vehicle.

428 Technical dataFuels, 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
Approved Service Products pamphlet, or
contact an authorized Mercedes-Benz
Center.
Using engine oils and oil filters of specifica-
tion 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 inter-
vals longer than those called for by the
Maintenance System (U.S. vehicles) or
FSS (Canada vehicles) will result in engine
damage not covered by the
Mercedes-Benz Limited WarrantyPlease follow Maintenance System (U.S.
vehicles) or FSS (Canada vehicles) recom-
mendations for scheduled oil changes.
Failure to do so will result in engine dam-
age not covered by the Mercedes-Benz
Limited Warranty.
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 is used in the air condition-
ing system.
Never use R-12 (CFC) or mineral-based
lubricating oil. Otherwise damage to the
system will occur.
Brake fluid
During vehicle operation, the boiling point
of the brake fluid is continuously reduced
through the absorption of moisture from
the atmosphere. Under extremely strenu-
ous operating conditions, this moisture
content can lead to the formation of bub-
bles in the system, thus reducing the sys-
tem’s efficiency.
Therefore, the brake fluid must be re-
placed every two years, preferably in the
spring.
Only brake fluid approved by
Mercedes-Benz is recommended. An
authorized Mercedes-Benz Center will
provide you with additional information.

432 Technical dataFuels, coolants, lubricants, etc.Hot weather performance
At ambient temperatures above 95°F
(35°C) start times may increase and be
accompanied by a rough idle following the
start.
Cruising range
E85 fuel contains less energy per gallon
than gasoline. To ensure that engine per-
formance with Ethanol fuel is similar to
that when using gasoline, the engine must
burn more Ethanol fuel. As a result, it is to
be expected that the fuel consumption will
increase when using E85 compared to
gasoline operation.
Maintenance
Please inform your authorized
Mercedes-Benz Center if you use or have
used E85 fuel when your vehicle is deliv-
ered for maintenance or repairs.
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 corro-
sion protection.
If the antifreeze mixture is effective to
-22°F (-30°C), the boiling point of the cool-
ant 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 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 approximately - 22°F
[-30°C]).
iUse of E85 may reduce your driving
range.

438 Technical termsControl 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.
Cruise control
Driving convenience system for auto-
matically maintaining the vehicle speed
set by the driver.
Curb weight
(
page 323)
DOT
(Department o
f Transportation)
(
page 323)
Engine number
The number set by the manufacturer
and placed on the cylinder block to
uniquely identify each engine pro-
duced.Engine oil viscosity
Measurement for the inner friction (vis-
cosity) of the oil at different tempera-
tures. The higher the temperature an
oil can tolerate without becoming thin,
or the lower the temperature it can tol-
erate without becoming viscous, the
better the viscosity.
ESP
(E
lectronic S
tability Pr
ogram)
Improves vehicle handling and direc-
tional stability.
ETD
(E
mergency T
ensioning D
evice)
Device which deploys in certain frontal
and rear collisions exceeding the sys-
tem's threshold to tighten the seat
belts.
->SRSFSS (Canada vehicles)
(F
lexible S
ervice S
ystem)
Maintenance service indicator in the
multifunction display that informs the
driver when the next vehicle mainte-
nance service is due. FSS evaluates
engine temperature, oil level, vehicle
speed, engine speed, distance driven
and the time elapsed since your last
maintenance service, and calls for the
next maintenance service accordingly.
GAWR
(G
ross A
xle W
eight R
ating)
(
page 323)
Gear range
Number of gears which are available to
the automatic transmission for shifting.
The automatic gear shifting process
can be adapted to specific operating
conditions using the gear selector le-
ver.

439 Technical terms
GPS*
(G
lobal P
ositioning S
ystem)
Satellite-based system for relaying
geographic location information to and
from vehicles equipped with special re-
ceivers. Employs CD digital maps for
navigation.
GVW
(G
ross V
ehicle W
eight)
(
page 324)
GVWR
(Gross V
ehicle W
eight R
ating)
(
page 324)
Instrument cluster
The displays and indicator/warning
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer
and fuel gauge.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 324)
Lock button
Button on the door which indicates
whether the door is locked or un-
locked. Pushing the lock button down
on an individual 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 accord-
ingly.Maximum load rating
(
page 324)
Maximum loaded vehicle weight
(page 324)
Maximum tire inflation pressure
(page 324)
Memory function*
Used to store three individual seat,
steering wheel and mirror positions for
each SmartKey.
MON
(Motor 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.

456 IndexM
Main dimensions 424
Maintenance
Vehicles with E85 fuel 432
Maintenance service
Overdue 331
Types 331
Maintenance service indicator
Calling up 331, 332
Clearing 331, 332
Maintenance System (USA
vehicles) 330, 439
Malfunction
Displaying 132
Malfunction memory
Calling up 132
Clearing 133
Manual headlamp mode 111
Manual operations
Fuel filler flap 379
Interior lighting control 118
Locking the vehicle 379
Panorama roof with power tilt/sliding
panel* 381
Unlocking the driver’s door 377
Unlocking the trunk lid 378Unlocking transmission gear selector
lever 380
Manual seat
Adjusting 36
Adjusting backrest tilt 36
Adjusting head restraint height 37
Adjusting head restraint tilt 37, 39
Adjusting seat cushion tilt 36
Adjusting seat height 36
Front seat head restraints 102
Seat fore and aft adjustment 36
Manual transmission 157
Shifting into reverse 158
Starting with 48
MAXCOOL maximum cooling 188
Maximum load rating 324
Maximum loaded vehicle weight 324
Maximum tire inflation pressure 324
MB Tex upholstery
Cleaning 338
Mechanical key 377
Memory function* 107, 439
Recalling positions from
memory 108
Storing exterior rear view mirror park-
ing position 109Storing key dependent settings 108
Menus 124
AUDIO 129
In control system 126, 127
NAVI* 131
Settings menu 133
Standard display 128
Submenus 125
TEL* 153
Trip computer 151
Vehicle status message memory
menu 132
Microphone
Hands-free microphone 29
Miles/kilometers in speedometer
Setting 137
Mirrors
Adjusting 42
Auto-dimming* for rear view
mirrors 168
Exterior rear view mirror parking
position* 150, 169
Exterior rear view mirrors 42
Interior rear view mirror 42, 167
Storing exterior rear view mirror park-
ing position* 109

458 IndexOne-touch gearshifting 160
Canceling gear range limit 161
Downshifting 160
Upshifting 160
Opening
Ashtray, center console 257
Ashtray, rear seat 258
Cup holders 256
Doors from the inside 94
Fuel filler flap 289
Fuel filler flap manually 379
Glove box 254
Hood 291
Panorama roof with power tilt/sliding
panel* 242, 381
Panorama roof with power tilt/sliding
panel* in an emergency 381
Panorama roof with power tilt/sliding
panel* with SmartKey 244
Roller sunblinds* 241
Side windows 237
Storage compartment, armrest 255
Trunk lid from the inside 95
Windows 237
Windows with SmartKey 239Operating
Audio system 195
CD player 131
COMAND* see separate operating in-
structions
Navigation system* 131
Radio 130
Radio transmitters 284
Satellite radio* 130
Telephone* 153, 195, 220
Operating safety
Audio system 195
Operator’s Manual 10
Ornamental moldings 335
Outside temperature 129
Outside temperature indicator 121
Overdue maintenance service 331
Overhead control panel 29
Overspeed range 440P
Paintwork 334
Panic alarm
Panic button on SmartKey 80
Panorama roof with power tilt/sliding
panel* 241
Closing 242, 381
Closing with SmartKey 244
Messages in display 372
Opening 242, 381
Opening with SmartKey 244
Stopping 244
Synchronizing 246
Parcel net
In front passenger footwell 257
Parking 56, 279
Parking brake 50, 56
Engaging 56
Message in display 358
Releasing 50
Parking lamps
Replacing bulbs 385, 388, 390
Switching on 110
Parking position*
Exterior rear view mirror 150, 169
Exterior rear view mirrors 109

461 Index
Resetting
All functions (control system) 133
All functions of a submenu 135
Fuel consumption 152
Maintenance service indicator 332
Trip odometer 121
Residual heat utilization 193
Residual ventilation 193
Restraint system
Message in display 356
Restraint system see Infant and child re-
straint systems
Restraint systems 440
Reverse (manual transmission)
Shifting into 158
Rim 325
Rims 419
Roller sunblinds*
Closing 241
Opening 241
RON 289
RON (Research Octane Number) 440
Roof rack* 250
Rubber parts
Cleaning 338S
Safety
Occupant 60
Safety belts see Seat belts
Safety systems
Driving 81
Satellite radio
Additional text information 212
General information 208
Manual channel input 210
Storing of station 212
Seat belt
Force limiter 69
Seat belt force limiter 69
Seat belt outlet height adjustment 46
Seat belts 66
Cleaning 337
Fastening 44
Height adjustment 46
Proper use of 47, 68
Safety guidelines 64
Warning lamp 344
Seat heating*
Switching off 106
Switching on 106
Seating capacity 305Seats 100
Adjusting 35
Easy entry/exit feature* 100
Heating* 106
Manual 36
Rear seat head restraints 105
Split rear bench seat 250
Securing cargo
Cargo tie-down rings 253
Selecting
Display for status indicator 138
Station (satellite radio) 210
Selector lever
Lock 49
Selector lever see gear selector lever
Self-test
OCS 77
Tele Aid* 262
Service
Major service (Service B) 330
Minor service (Service A) 330
Parts 414
When due 330
Service and Warranty Booklet
Loss of 415
Service indicator 330