2008 MERCEDES-BENZ GLK SUV oil change

Automatic transmission
Problem
Possible causes/consequences and
X
X Solutions The transmission has
problems shifting gear The transmission is losing oil.
X
Have the transmission checked at a qualified specialist work-
shop immediately. The acceleration ability
is deteriorating.
The transmission no
longer changes gear. The transmission is in emergency mode.
It is only possible to shift into
secondgear and reverse gear.
X Stop the vehicle.
X Turn the key to position 0(Y page 61) in the ignition lock.
X Wait at least 10 seconds before restarting the engine.
X Have the transmission checked at a qualified specialist work-
shop immediately. Parktronic*
Problem
Possible causes/consequences and
X
X Solutions Only the red segments
in the Parktronic warn-
ing display are lit. You
also hear a warning
tone for approximately
two seconds.
Parktronic is deactiva-
ted after approximately
20 seconds and the
indicator lamp in the
Parktronic button lights
up. Parktronic has malfunctioned and has switched itself off.
X
If problems persist, have Parktronic checked at a qualified spe-
cialist workshop. Only the red segments
in the Parktronic warn-
ing display are lit. Park-
tronic is deactivated
after approximately 20
seconds. The Parktronic sensors are dirty or there is interference.
X
Clean the Parktronic sensors (Y page 171).
X Switch the ignition back on. Troubleshooting
209Practical advice
* optional
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R
engine oil brand
R grade (MB Sheet number)
R SAE classification (viscosity)
is not available, you can use another min-
eral or synthetic engine oil which has been
approved by Mercedes-Benz. You must
then have an oil change carried out at the
earliest possible opportunity.
Mixing oils reduces the benefits of high-
grade engine oil.
! Do not use lubricant additives as they can
lead to increased wear and damage to
mechanical assemblies. The use of lubri-
cant additives will result in a restriction of
your warranty.
! Engine oils for vehicles without a diesel
particle filter may also be used temporarily
in vehicles with a diesel particle filter if the
engine oil listed is not available. You must
then have an oil change carried out as soon
as possible.
Engine oil viscosity Viscosity describes the flow characteristics
of a fluid. If an engine oil has a high viscosity, this means it is thick; a low viscosity means
that it is thin.
Select the SAE classification (viscosity) of the
engine oil according to the outside tempera-
ture. The following table shows you the vis-
cosity classes to be used depending on the
average air temperature. Capacities
The following values refer to an oil change
including the oil filter.
Engine with oil fil-
ter GLK 280 GLK 350 GLK 320 CDI
Replacement
amount
7.0 l 7.0 l 8.0 l
Coolant
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the
following tasks:
R anti-corrosion protection
R antifreeze protection
R raising the boiling point
i When the vehicle is first delivered, it is
topped up with a coolant that will ensure adequate antifreeze and corrosion protec-
tion.
! Only top up with coolant that has been
premixed with the desired antifreeze pro-
tection. Otherwise, you could damage the
engine.
Further information on coolants and on fill-
ing can be found in the Mercedes-Benz
Specifications for Service Products, sheet Service products and capacities
247Technical data
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310.1, or at any Mercedes-Benz Service
Centre.
! Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the cooling system will not be
sufficiently protected from corrosion, and
the boiling point will be too low.
If antifreeze/corrosion inhibitor is present in
the correct concentration, the boiling point of
the coolant will be around 130 °C.
The antifreeze/corrosion inhibitor concentra-
tion in the cooling system should:
R be at least 50%. This will protect the cooling
system against freezing down to around
–37 °C.
R not exceed 55% concentration (antifreeze
protection down to –45 °C); otherwise,
heat will not be effectively dissipated. If the vehicle has lost coolant, top it up with
equal amounts of water and antifreeze/cor-
rosion inhibitor. Mercedes-Benz recom-
mends an antifreeze/corrosion inhibitor
which has been approved for Mercedes-Benz.
!
The cooling system contains a supply
which must be renewed after 15 years, or
after 250, 000 km at the latest.
The warranty is only valid if you top up with
an antifreeze/corrosion inhibitor which
has been approved by Mercedes-Benz and
the recommended mixture ratio is
observed.
Capacities The following values indicate the total cooling
system capacities.
GLK 280 GLK 350 GLK 320 CDI
Coolant
8.4 l 8.4 l 11.5 l
Amount of antifreeze/corrosion inhibitor required for antifreeze protection
Down to –37 °C
(approx. 50%)
4.2 l 4.2 l 5.75 l
Down to –45 °C
(approx. 55%)
4.6 l 4.6 l 6.3 l
Brake fluid
Over a period of time, the brake fluid absorbs
moisture from the air; this lowers its boiling
point. G
Risk of accident
If the boiling point of the brake fluid is too low,
vapour pockets may form in the brake system
when the brakes are applied hard (e.g. when
driving downhill). This would impair braking
efficiency.
Have the brake fluid renewed every two years
with a brake fluid that has been approved by Mercedes-Benz and have this confirmed in
the Service Booklet.
i There is usually a notice in the Engine,
Compartment to remind you when the next
brake fluid change is due. 248 Service products and capacitiesTechnical data
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