2005 MERCEDES-BENZ C COUPE power steering

371 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
<
Belt system
Drive to workshop
The seat belt system is malfunctioning.

Visit an authorized Mercedes-Benz
Center as soon as possible.
_
Steering oil
Visit workshop.
The steering gear oil level is too low.
There is a danger of steering gear
damage.

Have the system checked by an
authorized Mercedes-Benz Center.
Warning!
G
If the level of steering gear oil in reservoir is
too low, the steering power assistance could
fail. Much greater effort will then be needed
to turn the steering wheel.
Do not add steering oil without checking the
steering system.
Do not drive the vehicle. Have the system
checked at an authorized Mercedes-Benz
Center as soon as possible.

372 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
K
Close slid./pop-up
sunroof
You have opened the driver’s door with
the SmartKey removed from the starter
switch and the panorama roof with power
tilt/sliding panel open.

Close the panorama roof with power
tilt/sliding panel (
page 242).
J
Close slid./pop-up
sunroof
You have opened the driver’s door with
the SmartKey removed from the starter
switch and the panorama roof with power
tilt/sliding panel open.

Close the panorama roof with power
tilt/sliding panel (
page 242).
L
Tele Aid malfunction.
Drive to workshop
One or more main functions of the Tele
Aid system* are malfunctioning.

Have the Tele Aid system* checked by
an authorized Mercedes-Benz Center.
t
Function unavailable.
This display appears if buttont
ors on the multifunction steering
wheel is pressed and the vehicle is not
equipped with a telephone*.
Ê
Trunk open
This message will appear whenever the
trunk lid is open.

Close the trunk lid.
W
Washer fluid
please refill
The fluid level has dropped to
about
1/3of total reservoir capacity.

Add washer fluid (
page 299).

407 Practical hints
Towing the vehicle
!
To be certain to avoid a possibility of
damage to the transmission, however,
we recommend the drive shaft be dis-
connected at the rear axle drive flange
for any towing beyond a short tow to a
nearby garage.
Warning!
G
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:

the engine will not run


there is a malfunction in the power sup-
ply or in the vehicle’s electrical system
as that will be necessary to adequately con-
trol the towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make sure the SmartKey is in
starter switch position2.
If the SmartKey is left in starter switch
position0 for an extended period of time, it
can no longer be turned in the switch. In this
case, the steering is locked. To unlock, re-
move SmartKey from starter switch and re-
insert.
iTo signal turns while being towed with
the hazard warning flasher in use, turn
SmartKey in starter switch to
position2 and activate the combina-
tion switch for the left or right turn sig-
nal in the usual manner – only the
selected turn signal will operate.
Upon canceling the turn signal, the
hazard warning flasher will operate
again.

408 Practical hintsTowing the vehicleWarning!
G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle. Adapt your driving accordingly.
!When towing the vehicle with all wheels
on the ground, please note the follow-
ing:
With the automatic central locking acti-
vated and the SmartKey in starter
switch position2, the vehicle doors
lock if the left front wheel as well as the
right rear wheel are turning at vehicle
speeds of approximately 9 mph
(15 km/h) or more.
Switch off the tow-away alarm
(page 87).
To prevent the vehicle doors from lock-
ing, deactivate the automatic central
locking (
page 148).
Towing of the vehicle should only be
done using the properly installed tow-
ing eye bolt. Never attach tow cable,
tow rope or tow rod to vehicle chassis,
frame or suspension parts.
iIf the battery is disconnected or dis-
charged

the SmartKey will not turn in the
starter switch. For more informa-
tion, see “Battery” (
page 401)
and “Jump starting” (page 404).


the gear selector lever will remain
locked in positionP. For informa-
tion on manually unlocking trans-
mission gear selector lever, see
(page 380).

417 Technical data
Layout of poly-V-belt drive
Layout of poly-V-belt drive
C230Kompressor
1Power steering pump
2Idler pulley
3Supercharger
4Automatic belt tensioner
5Air conditioning compressor
6Crankshaft
7Coolant pump
8Generator (alternator)
C320
1Automatic belt tensioner
2Power steering pump
3Air conditioning compressor
4Crankshaft
5Coolant pump
6Generator (alternator)
7Idler pulley

426 Technical dataFuels, coolants, lubricants, etc.CapacitiesVehicle components and their respective
lubricants must match. Therefore use only
brands tested and approved by
Mercedes-Benz. Please refer to the Factory Approved Service Products
pamphlet, or inquire at your authorized
Mercedes-Benz Center.
Model
Capacity
Fuels, coolants, lubricants, etc.
Engine with oil filter
C230Kompressor
C320
5.8 US qt (5.5 l)
7.9 US qt (7.5 l)
approved engine oils
Automatic transmission
8.5 US qt (8.0 l)
MB Automatic Transmission Fluid
Manual transmission
1.3 US qt (1.2 l)
MB Manual Transmission Oil
Rear axle
1.2 US qt (1.1 l)
Hypoid gear oil SAE 85 W 90
Power steering
approx. 1.1 US qt (1.0 l)
MB Power Steering Fluid (Pentosin CHF 11S)
Front wheel hubs
approx. 2.1 oz (60 g) each
High temperature roller bearing grease
Cooling system
C230Kompressor
C320
approx. 5.9 US qt (5.6 l)
approx. 6.8 US qt (6.4 l)
MB 325.0 Anticorrosion/Antifreeze Agent

440 Technical termsMultifunction display
Display field in the instrument cluster
used to present information provided
by the control system.
Multifunction steering wheel
Steering wheel with buttons for operat-
ing the control system.
Normal occupant weight
(
page 324)
OCS
(Occupant C
lassification S
ystem)
The system automatically turns the
front passenger front air bag on or off
based on the classified occupant size
category determined by weight sensor
readings from the seat.
Overspeed range
Engine speeds within the red marking
of the tachometer dial. Avoid this en-
gine speed range, as it may result in se-
rious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.Poly-V-belt drive
Drives engine-components (alternator,
AC compressor, etc.) from the engine.
Power train
Collective term designating all compo-
nents used to generate and transmit
motive power to the drive axles, includ-
ing


engine


clutch/torque converter


transmission


transfer case


drive shaft


differential


axle shafts/axles
Production options weight
(
page 324)
Program mode selector switch
Used to switch the automatic transmis-
sion between standard operation S and
winter operation C.PSI
(P
ounds per s
quare i
nch)
(
page 325)
Recommended tire inflation pressure
(page 325)
Restraint systems
Seat belts, child restraints, lower an-
chors and tethers for children (LATCH).
As independent systems, their protec-
tive functions complement one
another.
Rim
(page 325)
RON
(Research 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 AN-
TI-KNOCK INDEX.

447 Index
Checking
Brake fluid 290
Coolant level 290, 296, 359
Headlamp cleaning fluid 290
Oil level 290, 292
Tire inflate pressure 290
Vehicle lighting 290
Windshield washer fluid 290
Child safety 70
Air bags 62
Front passenger front air bag off indica-
tor lamp 27, 76, 345
Infant and child restraint systems 66,
70
LATCH child seat anchors 78
OCS 73
Child seat anchors see LATCH child seat
anchors
Cigarette lighter 259
Cleaning
Cup holders 337
Gear selector lever 337
Hard plastic trim items 337
Headlamps 167
Headliner 337
Instrument cluster 337Leather upholstery 338
Light alloy wheels 336
MB Tex upholstery 338
Plastic and rubber parts 338
Seat belts 337
Steering wheel 337
Upholstery 338
Windows 336
Windshield 54
Wiper blades 336
Wood trims 338
Cleaning tires 302
Climate control 172
Adjusting air distribution and
volume 176
Defogging windshield 176
Defrosting 177
Rear window defroster 170
Setting the temperature 175
Clock 25, 139
Closing
Ashtray, center console 258
Cup holder 257
Glove box 254
Hood 292
Luggage compartment 95Panorama roof with power tilt/sliding
panel* in an emergency 381
Panorama roof with power tilt/sliding
panel* with SmartKey 244
Storage compartment, armrest 255
Trunk lid 95
Windows 238
Windows with SmartKey 239
Cockpit 22, 437
Cockpit management and data system
(COMAND*) 437
Cold tire inflation pressure 323
Collapsible tire 437
Collapsible wheel chock 375
COMAND* see separate operating
instructions 437
Combination switch 114
Turn signals 52
Windshield wipers 53
Comfort driving
Transmission program mode 164
Control and operation of radio
transmitters 284