Mercedes-Benz 2011 GLK-Class Operator's Manual page 236

Engine compartment
234
Adding engine oil
H
Environmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful
to the environment.
! Only use engine oils and oil filters which
have been approved for vehicles with a
service system. A list of the engine oils and
oil filters that have been tested and
approved according to the Mercedes-Benz
specifications for service products can be
found on the Internet at http://
www.mbusa.com (USA only). Further
information on tested and approved engine
oils and oil filters can be obtained from any
authorized Mercedes-Benz Center.
The following causes engine failure or
damage to the exhaust system:
using engine oils and oil filters that are
R
not specifically approved for the service
system
replacing the engine oil and oil filter later
R
than the specified replacement interval
required by the service system
using engine oil additives
R
Example: engine oil cap
X
Turn cap : counter-clockwise and remove
it.
X
Add the amount of oil required.
Fill carefully to the maximum mark on the oil
dipstick.
i The difference in quantity between the
MIN mark and the MAX mark on the
dipstick is (depending on the engine)
approximately 1.6 to 2.1 US qt. (1.5 to 2 l).
!
Do not add too much oil. If the oil level is
above the MAX mark on the dipstick, too
much oil has been added. This can lead to
damage to the engine or the catalytic
converter. Have excess oil siphoned off.
Further information on engine oil
( Y page 297).
X
Replace cap : on the filler neck and
tighten clockwise.
Ensure that the cap locks into place
securely.
Checking and adding other service
products
Checking the coolant level
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
X
Turn the SmartKey to position
2( Y page 129) in the ignition lock.
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
X
Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
G
Warning
In order to avoid any potentially serious burns:
use extreme caution when opening the
R
hood if there are any signs of steam or
coolant leaking from the cooling system, or
if the coolant temperature display indicates
that the coolant is overheated.
do not remove the pressure cap on the
R
coolant reservoir if the coolant temperature
is above 158 ‡ (70 †). Allow the engine to
cool down before removing the cap. The
Y page 129).