Mercedes-Benz 2013 GLS Class - Manual (Page 341)

X Replace cap : on the filler neck and turn
clockwise.
Make sure that the cap locks securely into
place.
X Check the oil level again with the oil dip-
stick (
Y page 338).
For further information on engine oil; see
(
Y page 410).
Other service products
Checking the coolant level
G
WARNING
The engine cooling system is under pressure,
particularly if the engine is warm. You could
be scalded by hot coolant spraying out when
opening the cap. There is a danger of injury.
Allow the engine to cool before opening the
cap. Wear gloves and protective eyewear
when opening. Slowly turn the cap half a turn
to allow pressure to escape.
X Park the vehicle on a level surface.
Only check the coolant level if the vehicle
is on a level surface and the engine has
cooled down.
X Turn the key to position 2 in the ignition
lock ( Y page 157).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (
Y page 157).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
70 †.
X Turn the key to position 0 ( Y page 157) in
the ignition lock.
X Slowly turn cap : half a turn anti-clock-
wise to allow excess pressure to escape.
X Turn cap : further anti-clockwise and
remove it.
If the coolant is at the level of marker bar
= in the filler neck when cold, there is
enough coolant in coolant expansion
tank ;.
If the coolant level is approximately
1.5 cm above marker bar = in the filler
neck when warm, there is enough coolant
in coolant expansion tank ;.
X If necessary, top up with coolant that has
been tested and approved by Mercedes-
Benz.
X Replace cap : and turn it clockwise as far
as it will go.
For further information on coolant; see
(
Y page 411).
Topping up the windscreen washer sys-
tem/headlamp cleaning system
G
WARNING
Windscreen washer concentrate is highly
flammable. If it comes into contact with hot
engine components or the exhaust system it
could ignite. There is a risk of fire and injury.
Make sure that no windscreen washer con-
centrate is spilled next to the filler neck.
Engine compartment
339
Maintenance and care
Z