2002 MERCEDES-BENZ G500 Page 48

254 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Important!
Do not engage the front axle differential lock when
driving around tight corners as steering ability is
restricted.
When the transfer case differential lock is activated, the
ESP, ABS and BAS are automatically switched off.
The ABS malfunction indicator lamp and the ESP
warning lamp in the instrument cluster come on.
Further appear alternately the messages “ESP NOT
ACTIVE – LOCK ACTIVE”, “BAS NOT AVAILABLE –
LOCK ACTIVE” and “ABS NOT ACTIVE – LOCK
ACTIVE” in the multifunction display.
The differential locks should be engaged when driving
off-road, for example:
•for driving trough water or
•when driving on deep snow, icy or fouled surfaces.
For notes on off-road driving, see page 226.To engage differential locks:
Important!
To avoid damage to the transfer case and differential
locks:
• Engage differential locks only at low speed
(walking speed, not more than 5 mph).
• Do not engage differential locks if the driving
wheels are spinning.
Wa r n i n g !
Never drive on pavement with activated differential
locks.
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258 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
What you should know at the gas station
Fuel supplyOpen flap by pushing at rear (arrow). Turn fuel cap to
the left and hold on to it until possible pressure in tank
has been released, then remove cap. Failure to remove
slowly could result in personal injury.
The fuel filler cap is tethered to the fuel filler neck. Do
not drop the cap. It could damage the vehicle paint
finish.
Manual release of fuel filler flap, see page 347.
Important!
When refueling vehicle make certain that no gasoline
comes into contact with plastic taillamp, to prevent
damaging the lens.
Fuel
To prevent fuel vapors from escaping into open air, fully
insert filler nozzle unit.
Only fill fuel tank until the filler nozzle unit cuts out –
do not top up or overfill.
Wa r n i n 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, extinguish all smoking
materials. Never allow sparks, flame or smoking
materials near gasoline!
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259 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 Leaving the engine running and the fuel cap open can
cause the “CHECK ENGINE” lamp to illuminate.
Fuel tank capacity approximately 25.4 US gal (96.0 l).
This includes approximately 5.3 US gal (20.0 l) reserve.
Use premium unleaded gasoline: Posted Octane
Index 91 (Average of 96 RON / 86 MON).
•Engine oil
Engine oil level check, see page 127 and page 304.
Fill quantity between upper and lower dipstick
marking level: 2.1 US qt (2.0 l).
Recommended engine oils, see Approved Service
Products sheet.•Coolant
For normal replenishing, use water (potable water
quality).
For further information (e.g. anticorrosion/
antifreeze), see page 306 and 365.
• Spark plugs
Approved spark plugs, see page 360.
•Tire pressure
For tire pressure, refer to tire pressure label inside
the fuel filler flap. See page 318 for further details.
•Air conditioner
R-134a refrigerant and special PAG lubricant, see
page 363.
Wa r n i n g !
Overfilling of fuel tank may result in creating
pressure in the system which could cause a gas
discharge such as the gas spraying back out upon
removing the filler nozzle which could cause
personal injury.
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261 Check regulary and before a long trip
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Check regularly and before a long trip 1Engine oil level
See “Checking engine oil level” on page 304 and
“Engine oil level indicator” on page 127.
2Coolant level
See “Coolant level” on page 306.
3Brake fluid
See “Brake fluid” on page 363.
4Windshield washer system/
Headlamp cleaning system/
Rear window washer system
For refilling reservoir see page 307.
Opening hood, see page 302.
Vehicle lighting: Check function and cleanliness. For
replacement of light bulbs, see “Exterior lamps” on
page 328.
Exterior lamp switch, see page 129.
2
1
3
4
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266 Malfunction and indicator lamps
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Brake warning lamp
Except Canada
Canada only
When the brake warning lamp and message appear
while the engine is running, this means:
•there is insufficient brake fluid in the reservoir
(engine running and parking brake released), or
•the parking brake is set (engine running).
If a warning tone sounds for 5 seconds and the warning
lampsÉ and - are displayed in the instrument
cluster, the electronic brake booster (EBB) has a
malfunction and is switched off. See page 242 for notes
on the electronic brake booster (EBB).Note:
If you find that the minimum mark on the brake fluid
reservoir is reached, have the brake system checked for
brake pad thickness and leaks.
Wa r n i n g !
Driving with the brake warning lamp illuminated
can result in an accident. Have your brake system
checked immediately if the brake warning lamp
stays on. Do n ot a dd b ra ke f l uid b efore check in g t he
brake system. Overfilling the brake fluid reservoir
can result in spilling brake fluid on hot engine
parts and the brake fluid catching fire. You can be
seriously burned.
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267 Malfunction and indicator lamps
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index Supplemental restraint system (SRS) indicator lamp
When turning the electronic key in starter
switch to position 1 the indicator lamp “SRS”
in the instrument cluster comes on. If no
fault is detected, the lamp will go out after
approximately 4 seconds.
When turning the electronic key in starter switch to
position 2 the indicator lamp “SRS” in the instrument
cluster comes on. If no fault is detected, the lamp will go
out when the engine is running.
The operational readiness of the airbag system is
verified by the indicator lamp “SRS” in the instrument
cluster when turning the electronic key in starter switch
to position 1 or 2.
After the lamp goes out, the system continues to
monitor the components and circuitry of the airbag
system and will indicate a malfunction by coming on
again.See page 66 for notes on airbags, see page 71 for belt
tensioners and page 73 for infant and child seat
restraint.
Wa r n i n g !
In the event a malfunction of the “SRS” is indicated
as outlined above, the “SRS” may not be
operational. For your safety, we strongly
recommend that you visit an authorized
Mercedes-Benz Light Truck Center immediately to
have the system checked; otherwise the “SRS” may
n ot be a ct ivated when need ed in an ac c i den t, whi ch
could result in serious or fatal injury, or it might
deploy unexpectedly and unnecessarily which
could also result in injury.
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268 Malfunction and indicator lamps
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Fuel reserve warning
1Fuel reserve indicatorWhen the warning lamp (1) comes on after starting the
engine, or if it comes on while driving, it indicates that
the fuel level is down to the reserve quantity of
approximately 5.3 US gal (20 liters). In addition to the
warning lamp, the message “RESERVE FUEL” –“VISIT
FUEL STATION” appears in the multifunction display.
See page 258 for notes on refueling the vehicle.
After refueling the vehicle, the message
“1 MALFUNCTION” appears in the multifunction
display when turning the electronic key in starter
switch to p osition 2 . This malfun ction mes sage has to b e
cleared, see page 106 for notes on the malfunction /
warning message memory.
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269 Malfunction and indicator lamps
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index ABS malfunction indicator lamp
The ABS malfunction indicator lamp in the
instrument cluster comes on with the
electronic key in starter switch position 2
and should go out with the engine running.
When the ABS malfunction indicator lamp symbol and
warning in the instrument cluster remains illuminated
while the engine is running, it indicates that the ABS
has detected a malfunction and has switched off. In this
case, the brake system functions in the usual manner,
but without antilock assistance.
A malfunctioning ABS control unit can possibly affect
the operation of other systems (e.g. Navigation,
Automatic transmission). Be guided accordingly with
respect to the use of those systems and have the system
checked at your authorized Mercedes-Benz Light Truck
Center as soon as possible.
With the ABS malfunctioning the BAS, ESP, EBB and
4-ETS are also switched off. The malfunction indicator
lamps and malfunction messages in the multifunction
display come on with the engine running.If a warning tone sounds for 5 seconds and the warning
lamps- and É are displayed in the instrument
cluster, the EBB has a malfunction and is switched off.
See page 242 for notes on the electronic brake booster
(EBB).
If the charging voltage falls below 10 volts, the
malfunction indicator lamp comes on and the ABS is
switched off. When the voltage is above this value again,
the malfunction indicator lamp should go out and the
ABS is operational.
Have the system checked at your authorized
Mercedes-Benz Light Truck Center as soon as possible.
See page 239 for notes on antilock brake system (ABS).
Note:
If the transfer case differential lock is engaged the ABS
warning lamp comes on and the ABS, ESP, BAS, EBB
and 4-ETS are switched off. There is no malfunction in
the system.
ABS
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