2004 MERCEDES-BENZ C320 4MATIC WAGON power steering

298 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
_
STEERING WHEEL ADJ.
LOCK!
The steering column is not properly
locked.

Lock steering column (
page 37).
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 your authorized Mercedes-Benz
Center as soon as possible.

330 Practical hintsTowing the vehicle
!
To be certain to avoid a possibility of
damage to the drive train, however, we
recommend the drive shaft be discon-
nected at the rear axle drive flange
(vehicles with 4MATIC: disconnected at
the front and rear axle drive flanges) 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
supply or in the vehicle’s electrical
system
as that will be necessary to adequately
control the towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make certain that 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,
remove SmartKey from starter switch and
reinsert.
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
signal in the usual manner – only the
selected turn signal will operate.
Upon canceling the turn signal, the
hazard warning flasher will operate
again.

331 Practical hints
Towing the vehicle
Warning!
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
following:
With the automatic central locking
activated 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 approx. 9 mph (15 km/h) or
more.
Switch off the tow-away alarm
(page 81).
To prevent the vehicle doors from
locking, deactivate the automatic
central locking (
page 131).
Towing of the vehicle should only be
done using the properly installed
towing eye bolt. Never attach tow
cable, tow rope or tow rod to vehicle
chassis, frame or suspension parts.
iIf the battery is disconnected or
discharged

the SmartKey will not turn in the
starter switch. See notes on the
battery (
page 324) or on jump
starting (page 327).


the gear selector lever will remain
locked in positionP. See notes on
manually unlocking transmission
gear selector lever (
page 308).

339 Technical data
Layout of poly-V-belt drive
Layout of poly-V-belt drive
C 240/C 320 (all models)
1Automatic belt tensioner
2Power steering pump
3Air conditioning compressor
4Crankshaft
5Coolant pump
6Generator (alternator)
7Idler pulley

346 Technical dataFuels, coolants, lubricants, etc.
Fuels, coolants, lubricants, etc.Capacities
Vehicle components and their respectivelubricants must match. Therefore only use
brands tested and approved by
Mercedes-Benz.Please refer to the Factory Approved
Service Products pamphlet, or inquire at
your Mercedes-Benz Center.
Model
Capacity
Fuels, coolants, lubricants, etc.
Engine with oil filter
C240
C320
C2404MATIC
C3204MATIC
7.9 US qt (7.5 l)
7.9 US qt (7.5 l)
7.4 US qt (7.0 l)
7.4 US qt (7.0 l)
Approved engine oils
Automatic transmission
8.5 US qt (8.0 l)
MB Automatic Transmission Oil
Rear axle
1.2 US qt (1.1 l)
Hypoid gear oil SAE 85 W 90
Front axle
C2404MATIC
C3204MATIC
0.5 US qt (0.46 l)
Hypoid gear oil SAE 85 W 90
Transfer case
C2404MATIC
C3204MATIC
approx. 0.62 US qt (0.59 l)
MB Transfer case fluid
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
Brake system
0.5 US qt (0.5 l)
MB Brake Fluid (DOT 4+)
Cooling system
approx. 6.8 US qt (6.4 l)
MB 325.0 Anticorrosion/Antifreeze Agent

374 IndexHead restraints 91
Manual seats 34
Power seats* 35
Rear seats 92
Headlamp cleaning system 259
Headlamp shut-off delay see
Delayed shut-off, exterior lamps
Headlamps
Automatic control 101
Bi-Xenon type*
Replacing bulbs 313
Cleaning 269
Cleaning system 145, 259
Halogen-type
Replacing bulbs 312
Refilling washer fluid 259
Switching off 52
Switching on 46
Washer fluid 354
Washer system 354Headliner and shelf below rear window
Cleaning 271
Heated seats* 95
Height adjustment
Head restraints 34, 35, 92
Seat belts 42
Steering wheel 36
High beam flasher 47, 104
High beam headlamps
Messages in display 294
Replacing bulbs 310, 312
Switching on 104
High beam headlamps xenon type
Replacing bulbs 313
High mounted brake lamp 311
Hood 252
Closing 253
Message in display 293
Opening 252
Hydroplaning 242I
Identification labels 338
Certification label 338
Vehicle identification
number (VIN) 338
Ignition 31
Immobilizer 80
Activating 80
Deactivating 80
Infant and child restraint systems 65
Installing 70
LATCH-type child seat anchors 71
Information
About service and warranty 10
Button for Tele Aid* 227
Installing
Infant and child restraint systems 70
Parcel net in cargo compartment 208
Ski sack 208
Towing eye bolt 332
Twin-reel roller blind 211
Wiper blades 317

390 IndexVehicle battery 324
Vehicle care 267
Cloth upholstery 272
Cup holder 271
Engine cleaning 269
Gear selector lever 271
Hard plastic trim items 271
Headlamps 269
Instrument cluster 270
Leather upholstery 271
Light alloy wheels 270
MB Tex upholstery 272
Ornamental moldings 269
Paintwork 268
Plastic and rubber parts 272
Power washer 268
Seat belts 271
Side markers 269
Steering wheel 271Tail lamps 269
Tar stains 268
Turn signals 269
Upholstery 271
Vehicle washing 269
Window cleaning 270
Wiper blades 270
Wood trims 272
Vehicle identification number (VIN) 338
Vehicle jack 301
Vehicle lighting
Checking 251
Vehicle tool kit 300
Alignment bolt 301
Spare fuses 301
Special fuse puller 301
Towing eye bolt 301
Vehicle jack 301
Wheel bolts 301
Wheel wrench 301Vehicle washing 269
Ventilated storage compartment 156
Ventilation
Storage compartment 156
VIN (Vehicle Identification Number) 361
VIN (vehicle identification number) 338
Viscosity
Engine oil 358
Voice control system*
Hands-free microphone 27
W
Warning sounds
Drivers seat belts 62
Parking brake 45
Warranty coverage 337
Washer fluid see Windshield washer fluid
Washing the vehicle 267
Wear pattern (tires) 262
Weights 345