Mercedes-Benz GLS 2023, Operator'S Manual

Page: 346 / 538

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Park the vehicle on a level surface.
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Check the coolant temperature display on the
Instrument Display.
The coolant temperature must be in the bot-
tom quarter of the temperature indicator.
#
Slowly turn cap 1 counter-clockwise to
release overpressure.
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Continue turning cap
1
counter-clockwise
and remove it.
The coolant level is correct in the following cases:
R
If the engine is cold, the coolant is up to
marker bar 2 .
R
If the engine is warm, the coolant is up to
0.6 in (1.5 cm) over marker bar
2
.
#
If necessary, refill with coolant that has been
approved for Mercedes-Benz.
%
Further information on coolant (
/
page 417)
Refilling the windshield washer system
&
WARNING Risk of burns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
partment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system.
#
Allow the engine to cool down and only
touch component parts described in the
following.
&
WARNING ‑ Risk of fire and injury from
windshield washer concentrate
Windshield washer concentrate is highly flam-
mable. It could ignite if it comes into contact
with hot engine component parts or the
exhaust system.
#
Make sure that no windshield washer
concentrate spills out next to the filler
opening.
344 Maintenance and care