Mercedes-Benz GLS Operator's Manual page 329

When checking the oil level:
park the vehicle on a level surface.
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the engine should be switched off for approx-
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imately five minutes if the engine is at normal
operating temperature.
if the engine is not at normal operating tem-
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perature, e.g. if the engine was only started
briefly, wait about 30 minutes before carrying
out the measurement.
Checking the oil level using the oil dip-
stick
Example: vehicles with a gasoline engine
Example: vehicles with a diesel engine
Pull oil dipstick : out of the dipstick tube.
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Wipe off oil dipstick :.
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Slowly slide oil dipstick : into the guide tube
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to the stop, and take it out again.
If the level is between MIN mark = and MAX
mark ;, the oil level is correct.
If the oil level has dropped to MIN mark = or
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below, add 1.1 US qt (1.0 liter) engine oil.
Engine compartment
Adding engine oil
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Environmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful to
the environment.
!
Use only engine oils and oil filters that are
approved for vehicles with a service system. A
list of the engine oils and oil filters that have
been tested and approved in accordance with
Mercedes-Benz Specifications for Service
Products is available at any authorized
Mercedes-Benz Center.
The following cause engine failure or damage
to the exhaust system:
Use of engine oils and oil filters that have
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not been expressly approved for the service
system
Replacement of engine oil and oil filter after
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the replacement interval specified by the
service system has expired
Use of engine oil additives
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!
Do not add too much oil. adding too much
engine oil can result in damage to the engine
or to the catalytic converter. Have excess
engine oil siphoned off.
Example: engine oil cap
Turn cap : counter-clockwise and remove it.
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Add engine oil.
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If the oil level is at or below the MIN mark on
the oil dipstick, add 1.1 US qt (1.0 liter) of
engine oil.
Replace cap : on the filler neck and tighten
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clockwise.
Ensure that the cap locks into place securely.
Check the oil level again with the oil dipstick
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( page 327).
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327
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