check engine MERCEDES-BENZ G-Class 2015 W463 Owner's Guide

a qualified specialist workshop and have
the fuel tank and fuel lines drained com-
pletely.
! Overfilling the fuel tank could damage the
fuel system.
! Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
! Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection
system could be blocked by particles from
the fuel can.
If you overfill the fuel tank, pressure may build up in the fuel tank. This could cause fuel to
spray out when the fuel pump nozzle is
removed. There is a risk of injury. The fuel
tank is full when the fuel pump nozzle first
switches off. End the refueling process.
For further information on fuel and fuel quality
(Y page 337). Refueling
Vehicles with a fuel filler flap Example: G 550 fuel filler cap
:
To open the fuel filler flap
; Tire pressure table
= Fuel type
? To insert the fuel filler cap
When you open or close the vehicle with the
SmartKey, the fuel filler flap is automatically
unlocked or locked. The position of the fuel filler cap is displayed
8 in the instrument cluster. The arrow
next to the filling pump indicates the side of
the vehicle. The fuel filler flap is located to the
rear on the right.
Opening the fuel filler cap :
To open the fuel filler flap
; Tire pressure table
= Fuel type
? To insert the fuel filler cap
X Switch the engine off.
i When the engine is running and the fuel
filler flap is open, the yellow reserve fuel
warning lamp and the =(USA only)
or ; (Canada only) Check Engine warn-
ing lamp may light up.
Further information about warning and indi-
cator lamps in the instrument cluster can
be found in the Digital Operator's Manual.
X Remove the SmartKey from the ignition
lock.
X Turn the fuel filler cap counterclockwise
and remove it.
X Insert the fuel filler cap into the holder
bracket on the inside of filler flap ?.
Refueling X
Completely insert the filler neck of the fuel
pump nozzle into the tank and refuel.
i Do not add any more fuel after the pump
stops filling for the first time. Otherwise,
fuel may leak out. 148
RefuelingDriving and parking

helps avoid overheating and excessive
wear of the brakes.
When you take advantage of the engine
braking effect, a drive wheel may not turn
for some time, e.g. on a slippery road sur-
face. This could cause damage to the drive train. This type of damage is not covered bythe Mercedes-Benz warranty.
Heavy and light loads G
WARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
! Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy load, do not stop the vehicle immediately, but
drive on for a short while. This allows the air- flow to cool the brakes more quickly.
Wet roads If driving in heavy rain for a prolonged period
of time without braking, there may be a
delayed reaction from the brakes when brak-
ing for the first time. This may also occur after
the vehicle has been washed.
You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the vehi-
cle washed, brake firmly while paying atten-
tion to the traffic conditions. This will warm up
the brake discs, thereby drying them more
quickly and protecting them against corro-
sion. Limited braking performance on salt-
treated roads If you drive on salted roads, a layer of salt
residue may form on the brake discs and
brake pads. This can result in a significantly
longer braking distance.
R Brake occasionally to remove any possible
salt residue. Make sure that you do not
endanger other road users when doing so.
R Carefully depress the brake pedal and the
beginning and end of a journey.
R Maintain a greater distance to the vehicle
ahead.
Servicing the brakes !
If the brake warning lamp lights up in the
instrument cluster and you hear a warning
tone even though the parking brake has
been released, the brake fluid level may be too low. Observe additional warning mes-
sages in the multifunction display.
The brake fluid level may be too low due tobrake pad wear or leaking brake lines.
Have the brake system checked immedi-
ately. This work should be carried out at a
qualified specialist workshop.
! A function or performance test should
only be carried out on a 2-axle dynamom-
eter. If you are planning to have the vehicle
tested on such a dynamometer, contact an
authorized Mercedes-Benz Center to
obtain further information first. Otherwise,
you could damage the drive train or the
brake system.
! As the ESP ®
system operates automati-
cally, the engine and the ignition must be
switched off (the SmartKey must be in posi-
tion 0or 1in the ignition lock) if the parking
brake is tested on a brake dynamometer
(for a maximum of ten seconds).
Braking applications triggered automati-
cally by ESP ®
may otherwise seriously dam-
age the brake system. 154
Driving tipsDriving and parking

In order to prevent corrosion and a reduction
in the braking power of the parking brake,
observe the following:
R pull the parking brake upwards with the
release button depressed from time to time
before beginning the journey (Y page 151).
R drive for approximately 110 yds (100 m)at
a maximum speed of 12 mph (20 km/h) Driving on wet roads
Hydroplaning If water has accumulated to a certain depth
on the road surface, there is a danger of
hydroplaning occurring, even if:
R you drive at low speeds.
R the tires have adequate tread depth.
For this reason, in the event of heavy rain or in conditions in which hydroplaning may occur,
you must drive in the following manner:
R lower your speed.
R avoid ruts.
R brake carefully.
Driving on flooded roads !
Do not drive through flooded areas.
Check the depth of any water before driving
through it. Drive slowly through standing
water. Otherwise, water may enter the
vehicle interior or the engine compartment.
This can damage the electronic compo-
nents in the engine or the automatic trans- mission. Water can also be drawn in by the engine's air suction nozzles and this can
cause engine damage.
If you have to drive on stretches of road on
which water has collected, please bear in
mind that:
R the maximum permissible still water depth
depends on the vehicle equipment
R you should drive no faster than at a walking
pace Off-road fording !
Under no circumstances should you
accelerate before entering the water. The
bow wave could cause water to enter and
damage the engine and other assemblies.
! Do not open any of the vehicle's doors
while fording. Otherwise, water could get
into the vehicle interior and damage the
vehicle's electronics and interior equip-
ment.
i You may only drive through fresh water.
R Observe the safety notes (Y page 158) and
the general notes (Y page 158) on off-road
driving.
R Establish how deep the water is and the
characteristics of the body of water before
fording.
R Switch off the air-conditioning system.
R Shift the transfer case to LOW RANGE
(Y page 186).
R Engage the differential locks, if necessary
(Y page 189).
R Restrict the shift range to 1or 2
(Y page 145).
R Avoid high engine speeds.
R Enter and exit the water at a flat place and
at a steady walking pace.
R Drive slowly and at an even speed through
the water.
R Do not stop and do not switch off the
engine.
R Water offers a high degree of resistance,
and the ground is slippery and in some
cases unstable. Therefore, it is difficult and
dangerous to pull away in the water.
R Ensure that a bow wave does not form as
you drive.
R Clean any mud from the tire tread after
fording.
R Apply the brakes to dry them after fording.
Always observe the fording depth values
(Y page 345). 156
Driving tipsDriving and pa
rking

Off-road driving
Important safety notes G
WARNING
Do not load items on the basic carrier bars. It
may cause instability during some maneuvers which could result in an accident.
Drive slowly in unknown terrain. This will
make it easier to recognize unexpected obsta-
cles and avoid damage to the vehicle.
To help avoid the vehicle rolling over, never
turn it around on steep inclines. If the vehicle cannot complete the attempted climb, back it
down in reverse gear.
Do not drive along the side of a slope. The
vehicle might otherwise rollover. If in doing so
the vehicle begins to show a tendency to roll,
immediately steer into a line of gravity
(straight up or downhill).
Never let the vehicle roll backwards in idle.
You may lose control of the vehicle if you use only the service brake. For information on
driving downhill, see "Driving downhill".
When driving off-road, sand, mud and water,
possibly mixed with oil, for example, could get
into the brakes. This could result in a reduced
braking effect or in total brake failure and also in increased wear and tear. The braking char- acteristics change depending on the material
ingressing the brakes. Clean the brakes after driving off-road. If you detect a reduced brak- ing effect or grinding noises, have the brake
system checked in a qualified specialist work- shop as soon as possible. Adapt your driving
style to the different braking characteristics.
Driving off-road increases the likelihood of
damage to the vehicle, which, in turn, can lead to failure of the mechanical assembly or sys-
tems. Adapt your driving style to suit the ter-
rain conditions. Drive carefully. Have damage to the vehicle rectified immediately at a quali-
fied specialist workshop. General notes H
Environmental note
Protection of the environment is of primary
importance. Treat nature with respect.
Observe all prohibiting signs.
Read this section carefully before driving your
vehicle off-road. Practice by driving over more gentle off-road terrain first.
Familiarize yourself with the characteristics
of your vehicle and the gear shift operation
before driving through difficult terrain.
The following driving systems are specially
adapted to off-road driving:
R 4ETS (Y page 63)
R Transfer case (Y page 186)
R Differential locks (Y page 188)
Observe the following notes:
R stop your vehicle and, if necessary, shift the
transfer case to LOW RANGE(Ypage 186)
before driving off-road.
R AMG vehicles: the ECO start/stop func-
tion is not available in transfer case posi-
tion LOW RANGE (Ypage 136).
R engage the differential locks, if necessary
(Y page 189).
i ABS, 4ETS, ESP ®
and BAS are deactivated
while the differential locks are engaged.
This allows the front wheels to lock briefly,
so that these can dig into a loose surface.
However, please note that locked wheels
skid and can no longer steer.
R Check that items of luggage and loads are
stowed safely and are well secured
(Y page 253).
R To avoid damaging the vehicle, make sure
there is always sufficient ground clearance.
R Always keep the engine running and in gear
when driving on a downhill gradient.
R Always keep the engine running and in gear
when driving on a slope.
R Drive slowly and evenly, if necessary at a
walking pace. 158
Driving tipsDriving and parking

R
Ensure that the wheels are in contact with
the ground at all times.
R Drive with extreme care on unfamiliar off-
road routes where visibility is poor. For
safety reasons, get out of the vehicle first
and survey the off-road route.
R Check the depth of water before fording
rivers and streams.
R When fording, do not stop and do not
switch off the engine.
R Look out for obstacles, such as rocks,
holes, tree stumps and furrows.
R Always keep the doors, rear door, side win-
dows and the sliding sunroof closed while
the vehicle is in motion.
R Switch off cruise control.
R Do not stray from marked routes or paths.
R Adapt your speed to the terrain. The
rougher, steeper or more ruts on the ter-
rain, the slower your speed should be.
R Drive slowly and at an even speed through
the water. Ensure that a bow wave does not form as you drive.
R On sand, drive quickly to overcome the roll-
ing resistance. Otherwise the vehicle's
wheels could become stuck in loose
ground.
R Do not jump with the vehicle as this will
interrupt the vehicle's propulsion.
R Avoid high engine speeds. Drive at appro-
priate engine speeds (maximum
3,000 rpm).
R Do not shift the automatic transmission to
transmission position N.
R Always check the vehicle for damage after
off-road driving.
i Information about retrofitting special all-
terrain tires is available from any qualified
specialist workshop.
i Do not use the HOLD function when driv-
ing off-road, on steep uphill or downhill gra- dients or on slippery or loose surfaces. The
HOLD function cannot hold the vehicle on
such surfaces. Checklist before driving off-road !
If the engine oil warning lamp lights up
while the vehicle is in motion, stop the vehi- cle in a safe place as soon as possible.
Check the engine oil level. The engine oil
warning lamp warning must not be ignored.
Continuing the journey while the symbol is
displayed could lead to engine damage.
X Oil level: check the engine oil level and add
oil if necessary.
Only then does the engine receive enough
oil when the vehicle is on a steep incline.
X Tire-changing tool kit: check that the jack
is working and make sure you have the lug
wrench, a robust tow cable and a folding
spade in the vehicle.
X Wheels and tires: check the tire tread
depth and tire pressure.
X Check for damage and remove any foreign
objects, e.g. small stones, from the
wheels/tires.
X Replace any missing valve caps.
X Replace dented or damaged wheels.
X Carry a sound spare wheel.
Checklist after driving off-road Driving over rough terrain places greater
demands on your vehicle than driving on nor-
mal roads. After driving off-road, check the
vehicle. This allows you to detect damage
promptly and reduce the risk of an accident to
yourself and other road users.
X Shift the transfer case to HIGH
RANGE(Y page 186).
X Disengage the differential locks
(Y page 190).
X Clean the headlamps and rear lights and
check for damage.
X Clean the front and rear license plates.
X Clean the wheels and tires with a water jet
and remove any foreign objects. Driving
tips
159Driving an d parking Z

X
Clean the wheels, tires, wheel housings and
the vehicle underside with a water jet;
check for any foreign objects and damage.
X Check whether twigs or other parts of
plants have become trapped. These
increase the risk of fire and can damage
fuel pipes, brake hoses or the rubber bel-
lows of the axle joints and propeller shafts.
X After the trip, examine without fail the
entire undercarriage, wheels, tires, brakes,
bodywork structure, steering, chassis and
exhaust system for damage.
X After driving for extended periods across
sand, mud, gravel, water or in similarly dirty
conditions, have the brake discs, wheels,
brake pads/linings and axle joints checked and cleaned.
X If you notice strong vibrations after off-road
driving, check for foreign objects in the
wheels and drive train and, if necessary,
remove them.
Foreign objects can disturb the balance
and cause vibrations.
X Test the brakes.
Driving on sand Observe the following rules when driving on
sand:
R Shift the transfer case to LOW
RANGE( Ypage 186).
R Avoid high engine speeds.
R Limit the shift range of the automatic trans-
mission according to the off-road condi-
tions.
R Drive quickly to overcome the rolling resist-
ance. Otherwise the vehicle's wheels could become stuck in loose ground.
R Drive in the tracks of other vehicles if pos-
sible. When doing so, make sure that:
- the tire ruts are not too deep.
- the sand is sufficiently firm.
- your vehicle has sufficient ground clear-
ance Tire ruts and gravel roads !
Check that the ruts are not too deep and
that your vehicle has sufficient clearance.
Otherwise, your vehicle could be damaged
or bottom out and get stuck.
Observe the following rules when driving
along ruts in off-road terrain or on roads with loose gravel:
R Shift the transfer case to LOW
RANGE(Y page 186).
R Avoid high engine speeds.
R Observe the safety notes (Y page 158) and
the general notes (Y page 158) on off-road
driving.
R Restrict the shift range of the automatic
transmission to 1(Y page 145).
R Drive slowly.
R Where ruts are too deep, drive with the
wheels of one side on the center grassy
area, if possible.
Driving over obstacles !
Obstacles could damage the floor of the
vehicle or components of the chassis. Ask
passengers for guidance when driving over
large obstacles. The passenger should
always keep a safe distance from the vehi- cle when doing so in order to avoid injury as
a result of unexpected vehicle movements. After driving off-road or over obstacles,
check the vehicle for possible damage,
especially to the underbody and the com-
ponents of the chassis.
! Drive with particular care when driving
over an obstacle while driving up or down a
steep slope.
The vehicle could otherwise tilt and slide
sideways or tip over. 160
Driving tipsDriving and pa
rking

Observe the following rules when driving over
tree stumps, large stones and other obsta-
cles:
R Observe the safety notes (Y page 158) and
the general notes (Y page 158) on off-road
driving.
R Shift the transfer case to LOW RANGE
(Y page 186).
R Avoid high engine speeds.
R Restrict the shift range to 1(Y page 145).
R Make sure that you have enough ground
clearance before driving across an obsta-
cle.
R Drive very slowly.
R Try to drive straight over the center of
obstacles: front wheel first, then rear
wheel. Traveling uphill
Approach/departure angle G
WARNING
If you drive on a steep incline at an angle or
turn when driving on an incline, the vehicle
could slip sideways, tip and rollover. There is a risk of an accident.
Always drive on a steep incline in the line of
fall (straight up or down) and do not turn the
vehicle.
Always observe the approach/departure
angle values (Y page 346). R
Observe the safety notes (Y page 158) and
the general notes (Y page 158) on off-road
driving.
R Do not drive at an angle on slopes, inclines
or gradients, but instead follow the direct
line of fall. Note that the climbing ability of your vehicle depends on the terrain condi-
tions.
R Before driving on extreme uphill and down-
hill gradients, shift the transfer case to
LOW RANGE (Ypage 186).
R Engage the differential locks, if necessary
(Y page 189).
R Drive slowly.
R Accelerate gently and make sure that the
wheels are gripping.
R Avoid high engine speeds, except when
driving on sandy and muddy routes with
high driving resistance.
R Avoid high engine speeds – drive at an
appropriate engine speed (maximum
3,000 rpm).
R When driving down an incline, make use of
the engine's braking effect. Observe the
engine speed; do not overrev the engine.
i Further information on the maximum
engine speed: (Y page 198).
R Select a shift range appropriate to the gra-
dient.
R Before tackling steep downhill gradients,
select shift range 1(Y page 145).
R Always check the brakes after driving off-
road.
i Hill start assist will aid you when pulling
away on a hill.
For more information, see "Hill start assist"
(Y page 135).
Maximum gradient-climbing capability Always observe the maximum gradient climb-
ing ability values (Y page 346). Driving tips
161Driving and parking Z

Hilltops
When driving on an uphill gradient, reduce
pressure slightly on the accelerator immedi-
ately before reaching the top of the hill (do not
shift the transmission to position N). Use the
vehicle's own impetus to drive over the top of the hill.
This style of driving prevents:
R the vehicle from lifting off the ground on the
brow of a hill
R loss of traction
R the vehicle from traveling too quickly down
the other side
Driving downhill R
Before tackling steep downhill gradients,
select shift range 1(Ypage 145).
This way you use the engine's braking
effect to reduce the speed. If this is not
sufficient, brake gently. When doing so,
make sure that the vehicle is facing in the
direction of the line of fall.
R Observe the notes on driving in mountain-
ous terrain (Y page 161).
R Drive slowly.
R Do not drive at an angle down steep
inclines. Steer into the line of fall and drive
with the front wheels aligned straight. Oth-erwise, the vehicle could slip sideways, tip
and roll over.
R Check that the brakes are working normally
after a long downhill stretch.
i The special off-road ABS setting
(Y page 62) enables repeated, brief, pre-
cise locking of the front wheels, which
leads to the wheels digging into the loose
ground. Note that when the front wheels
are fully braked, they slide easily over the
surface of the ground, making it difficult to
steer. Driving systems
Cruise control
Important safety notes G
WARNING
The brake pedal moves when cruise control
brakes the vehicle. A foot in the area under
the brake pedal could become trapped. The
movement of the pedal, and therefore the
vehicle's ability to brake, may be restricted by objects in the area under the brake. There is a
risk of an accident and injury.
Do not place your foot under the brake pedal. Keep the area under the brake pedal free from
obstructions.
If you fail to adapt your driving style, cruise
control can neither reduce the risk of acci-
dent nor override the laws of physics. Cruise
control cannot take account of road, weather and traffic conditions. Cruise control is only
an aid. You are responsible for the distance to
the vehicle in front, for vehicle speed and for braking in good time. Adjust your driving style to the traffic conditions. Only engage cruise
control when the current road, weather and
traffic conditions permit it to be done safely.
Drive carefully and maintain a suitable dis-
tance to the vehicle in front.
Do not use cruise control:
R in traffic conditions that do not allow you to
drive at a constant speed, e.g. heavy traffic,
on winding roads or off-road
R on slippery road surfaces. Braking or accel-
erating could cause the drive wheels to lose
traction and the vehicle could then skid
R when there is poor visibility, e.g. due to fog,
heavy rain or snow
General notes Cruise control maintains a constant road
speed for you. On long and steep downhill
gradients, especially if the vehicle is laden,
you must select shift range
1,2or 3in good
time. By doing so, you will make use of the 162
Driving systemsDriving and parking

braking effect of the engine. This relieves the
load on the brake system and prevents the
brakes from overheating and wearing too
quickly.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a
steady speed for a prolonged period. You can store any road speed above 20 mph
(30 km/h).
i Cruise control should not be activated
when driving off-road.
Cruise control lever :
To activate or increase speed
; LIM indicator lamp
= To activate at the current speed/last
stored speed
? To activate or reduce speed
A To switch between cruise control and var-
iable SPEEDTRONIC
B To deactivate cruise control
You can operate cruise control and variable
SPEEDTRONIC with the cruise control lever.
When you activate cruise control, the stored
speed is shown in the multifunction display
for five seconds.
The LIM indicator lamp on the cruise control
lever indicates which system you have selec-
ted:
R LIM indicator lamp off: cruise control is
selected.
R LIM indicator lamp on: variable SPEED-
TRONIC is selected. Activation conditions To activate cruise control, all of the following
activation conditions must be fulfilled:
R the parking brake must be released.
R you are driving faster than 20 mph
(30 km/h).
R ESP ®
must be active, but not intervening.
R the transmission must be in position D.
Selecting cruise control :
To activate or increase speed
; LIM indicator lamp
= To activate at the current speed/last
stored speed
? To activate or reduce speed
A To switch between cruise control and var-
iable SPEEDTRONIC
B To deactivate cruise control
X Check whether LIM indicator lamp ;is off.
If it is off, cruise control is already selected.
If it is not, press the cruise control lever in
the direction of arrow A.
LIM indicator lamp ;in the cruise control
lever goes out. Cruise control is selected. Driving systems
163Driving and parking Z

General notes
SPEEDTRONIC brakes automatically so that
you do not exceed the set speed. On long and steep downhill gradients, especially if the
vehicle is laden or towing a trailer, you must
select shift range 1,2or 3in good time. By
doing so, you will make use of the braking
effect of the engine, which relieves the load
on the brake system and prevents the brakes from overheating and wearing too quickly. If
you need additional braking, depress the
brake pedal repeatedly rather than continu-
ously.
i The speed indicated in the speedometer
may differ slightly from the limit speed
stored.
Cruise control lever :
To store the current speed or a higher
speed
; LIM indicator lamp
= To call up the last speed stored
? To store the current speed or a lower
speed
A To switch between cruise control and var-
iable SPEEDTRONIC
B To deactivate variable SPEEDTRONIC
You can operate cruise control and variable
SPEEDTRONIC with the cruise control lever. The LIM indicator lamp on the cruise control
lever indicates which system you have selec-
ted:
R LIM indicator lamp off: cruise control is
selected.
R LIM indicator lamp on: variable SPEED-
TRONIC is selected.
You can use the cruise control lever to limit
the speed to any speed above 30 km/h while
the engine is running.
Selecting variable SPEEDTRONIC :
To activate or increase speed
; LIM indicator lamp
= To activate at the current speed/last
stored speed
? To activate or reduce speed
A To switch between cruise control and var-
iable SPEEDTRONIC
B To deactivate cruise control
If you fail to adapt your driving style, SPEED-
TRONIC can neither reduce the risk of acci-
dent nor override the laws of physics. SPEED-
TRONIC cannot take account of road, weather
and traffic conditions. SPEEDTRONIC is only
an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for
braking in good time and for staying in lane.
Only engage SPEEDTRONIC when the current
road, weather and traffic conditions permit it to be done safely. Drive carefully and main-
tain a suitable distance to the vehicle in front.
X Check whether LIM indicator lamp ;is on. Driving systems
167Driving and parking Z