2001 MERCEDES-BENZ C320 oil

126 Flexible service system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
The service indicator disappears automatically after
30 seconds or if the knob for instrument cluster
illumination, see page 88, in the instrument cluster is
pressed.
Calling up service indicator manually:
Turn the electronic key in starter switch to position 1.
Call up the trip odometer and main odometer by
pressing button è or ÿ on the multifunction
steering wheel until the display appears. See page 96.
Press button j or k until the FSS indicator
appears.
The next or previous system is displayed by pressing
button è or ÿ.
Important!
The FSS indicator is not an engine oil level indicator.
See page 128 for engine oil level indicator.Note:
When disconnecting vehicle battery for one or more
days at a time, such days will not be counted. Any such
days not counted by the FSS can be added by your
Mercedes-Benz Center.
The interval between services is determined by the type
of driving for which the vehicle is used. For example,
driving at extreme speeds, and cold starts combined
wi t h short di stan ce d r ivi ng in which the e ngin e d oes not
reach operating normal temperature, reduce the interval
between services.

128 Engine oil level indicator
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Engine oil level indicator
To check the engine oil level, park vehicle on level
ground, with engine at normal operational temperature.
Check oil level approximately 5 minutes after stopping
the engine, allowing for the oil to return to the oil pan.
The message “PERF. SERV. ON TIME” (perform service
[engine oil level check] on time) will be displayed if the
required waiting period has not been observed after
stopping the engine:
•with engine at operational temperature
approximately 5 minutes.•with engine not at operational temperature up to
approximately 30 minutes.
The engine oil level check can be repeated after a short
time.
Turn the electronic key in starter switch to position 2.
To call up the trip odometer and main odometer, press
button è or ÿ on the multifunction steering
wheel until the display appears. See page 96.
Press button j or k on the multifunction
steering wheel repeatedly until the “MEASUREMENT
CORRECT – ONLY IF VEH. LEVEL” engine oil level
indicator appears. This indicator is only a reminder.
Measurement can be cancelled by pressing button j
or k if the vehicle is not parked on level ground. An
incorrect reading will be recorded if you do not cancel
the measurement. Move the vehicle to level ground and
measure again.
The electronic key in starter switch is not in position 2 if
the “ENGINE OIL LEVEL – SWITCH ON IGNITION”
message appears.
The “ENGINE OIL LEVEL – MEASURING NOW”
message is displayed after approximately 3 seconds.
P54.30-3607-26

129 Engine oil level indicator
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index One of the following messages will subseq uently appear
on the indicator:
“ENGINE OIL LEVEL – O.K.”
No oil needs to be added.
“ENGINE OIL LEVEL – ADD 1.0 QUART”
(Canada: 1.0 L)
“ENGINE OIL LEVEL – ADD 1.5 QUART”
(Canada: 1.5 L)
“ENGINE OIL LEVEL – ADD 2.0 QUART”
(Canada: 2.0 L)
See “Checking engine oil level”, on page 300 for
instructions on adding engine oil.
“ENGINE OIL LEVEL – REDUCE OIL LEVEL”
Do not overfill the engine.
Excessive oil must be siphoned or drained off. It could
cause damage to the engine and catalytic converter not
covered by the Mercedes-Benz Limited Warranty.The “PERF. SERV. ON TIME” message will be displayed
if a proper oil level check cannot be performed. The
engine oil level check can be repeated after a short
while.
Perform the engine oil level check with the dipstick, if it
cannot be completed via the multifunction display.
See “Checking engine oil level”, on page 300.
In this case we recommend that you have the system
checked at a Mercedes-Benz Center.
Notes:
See malfunction and warning messages on page 274
and page 283 if an engine oil level indicator appears on
the multifunction display when the engine is running.
The engine oil level cannot be checked while the engine
is running. The “ENGINE OIL LEVEL – NOT WHEN
ENGINE ON” message will appear.
Engine oil consumption
Engine oil consumption checks should only be made
after the break-in period. During the break-in period,
higher oil consumption may be noticed and is normal.
Frequent driving at high engine speeds results in
increased consumption.

178 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Adjusting the volume
Turning the control knob clockwise will increase the
volume, counterclockwise will decrease the volume.
Note:
The volume setting can be selected separately for the
telephone, audio system and voice recognition system.
Entering telephone number and starting dialing
process
Enter the desired telephone
number using the alpha-
numeric keypad. The number
can have up to 32 digits, but
only 13 of these can be
displayed. The dialing process is started by pressing the
“SND” key. The entered number can be corrected using
the “CLR” key.
Press the “CLR” key briefly, and the last digit will be
deleted.
Press and hold the “CLR” key, and the complete number
will be deleted.Calling up the telephone book
The numbers stored in the telephone number memory
can be called up via either name or number entries. The
memory contents from the portable telephone must
contain numbers and names in at least one memory
location and the portable telephone must be connected
to the vehicle coil cord in order to call up the telephone
book. Refer to the “Memory download” section of the
cellular telephone operation guide for more information.
Switching between name search and number search
Press “ABC” key - Name search
Press “NUM” key - Number search

251 Driving instructions
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index If the vehicle is parked af ter being driven on salt treated
roads, the braking efficiency should be tested as soon as
possible after driving is resumed while observing the
safety rules in the previous paragraph.Winter driving
Have your vehicle winterized at your authorized
Mercedes-Benz Center before the onset of winter.
•Change the engine oil if the engine contains an oil
which is not approved for winter operation. For
viscosity (SAE / CCMC class) and filling quantity,
seepage357.
•Check engine coolant anticorrosion / antifreeze
concentration.
•Additive for the windshield washer and headlamp
cleaning system: Add MB Concentrate “S” to a
premixed windshield washer solvent / antifreeze
which is formulated for below freezing
temperatures, see page 302.
•Test battery: Battery capacity drops with decreasing
ambient temperature. A well charged battery helps
to ensure that the engine can be started, even at low
ambient temperatures.
Wa r n i n g !
If the vehicle becomes stuck in snow, make sure
that snow is kept clear of the exhaust pipe and
from around the vehicle with engine running.
Otherwise, deadly carbon monoxide (CO) gases may
enter vehicle interior resulting in unconsciousness
and death.To assure sufficient fresh air ventilation, open a
window slightly on the side of the vehicle not
facing the wind.

265 What you should know at the gas station
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Fuel tank capacity approximately 16.4 US gal (62.0 l).
This includes approximately 2.1 US gal (8.0 l) reserve.
Use premium unleaded gasoline:
Posted Octane Index 91 (Average of 96 RON / 86 MON).
Engine oil
Checking oil level, see instructions on page 128
and 300.
Recommended engine oils, see Approved Service
Products sheet.
Coolant
For normal replenishing, use water (potable water
quality). For further information refer to page 301.
Tire pressure
For tire pressure, refer to tire pressure label inside the
fuel filler flap. See page 315 for further details.Spark plugs
Approved spark plugs, refer to “Technical Data”.
Air conditioner
R-134a refrigerant and special PAG lubricant, refer to
“Technical Data”.
Bulbs
High and low beams: H7 (55 W),
low beam: Xenon (optional)
fog lamps: H B4 (55 W),
turn signal lamps,
front 1156 NA (26.9 / 5 W/32/4 cp),
parking and standing lamps, front: W 5W (5 W)
side marker lamps, front: 5 W / 4 cp,
turn signal lamps, rear: PY 21 W bulb (yellow),
stop lamps: P 21 W/32 cp bulb,
rear fog lamp, driver’s side: P 21 W/32 cp bulb,
tail, parking, standing and
side marker lamp: R 5 W / 4 cp,
backup lamps: 21 W / 32 cp,
license plate lamps: 5 W / 4 cp

267 Contents - Instrument cluster display
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Instrument cluster displayMalfunction and indicator lamps in
the instrument cluster .............268
On-board diagnostic system .........268
Check engine malfunction
indicator lamp .............................268
Brake warning lamp ..................270
Supplemental restraint system
(SRS) indicator lamp .................. 271
Fuel reserve warning ................. 271
ABS malfunction
indicator lamp .............................272
Electronic stability program
(ESP) — warning lamp ...............273
Seat belt nonusage
warning lamp .............................273Malfunction and indicator lamp in
the center console .................... 273
AIRBAG OFF indicator lamp .... 273
Malfunction and warning messages
in the multifunction display ....274
DISPLAY DEFECTIVE ................ 275
BATTERY / ALTERNATOR ........276
ANTILOCK BRAKE SYSTEM .... 277
BRAKE ASSIST ........................... 277
BRAKE LINING WEAR .............. 278
BRAKE FLUID ............................ 278
PARKING BRAKE ....................... 279
SEAT BELT SYSTEM .................. 279
ELEC. STABIL. PROG.
(Electronic stability program) . 280
COOLANT (coolant level) ......... 281COOLANT
(coolant temperature) ................282
ENGINE OIL LEVEL ...................283
LIGHTING SYSTEM ....................284
LIGHT SENSOR ...........................286
DOOR ...........................................286
TRUNK OPEN .............................287
HOOD ...........................................287
TELEPHONE – FUNCTION .......288
TELE AID .....................................288
WASHER FLUID .........................289
RESTRAINT SYSTEM .................290
KEY ...............................................290
FUEL RESERVE .......................... 291
UNDERVOLTAGE ........................ 291
STEER. WHEEL ADJUST. ...........292
ENTRANCE POSITION ..............292

283 Malfunction and warning messages
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index ENGINE OIL LEVEL
* C = Category, see page 274.
1 The engine oil level must be checked immediately. See Engine oil
level indicator on page 128.
2 There is no oil in the engine. There is a danger of engine damage.3 There is a risk of damaging the engine or catalytic converter. The
engine oil level must be checked immediately. See Engine oil level
indicator on page 128.
4 The engine oil level has dropped to a critical level.
Check the engine oil level immediately. See Engine oil level
indicator on page 128 and check the engine for visible leakage
(loss of oil).
It may be that there is water in the engine oil. Have the engine oil
checked.
5 The measuring system is malfunctioning.
When the “ENGINE OIL LEVEL – CHECK LEVEL!”
message appears while the engine is running and at
operating temperature, the engine oil level has dropped
to approximately the minimum mark on the dipstick.
When this occurs, the warning will first come on
intermittently and then stay on if the oil level drops
further.
If no oil leaks are noted, continue to drive to the nearest
service station where the engine oil should be topped to
the “full” mark on the dipstick with an approved oil.
The engine oil level warnings should not be ignored.
Extended driving with the symbol displayed could
result in serious engine damage that is not covered by
the Mercedes-Benz Limited Warranty.
Line 1 Line 2 C*
ENGINE OIL LEVEL CHECK LEVEL!
1
2
ENGINE OIL LEVEL STOP, ENGINE OFF!
2
1
ENGINE OIL LEVEL REDUCE OIL LEVEL1
3
2
ENGINE OIL VISIT WORKSHOP!
4
2
ENGINE OIL LEVEL VISIT WORKSHOP!
5
2