Mercedes-Benz S-Coupe 2015 - Manual (Page 325)

opening the cap, you could be scalded by hot
coolant spraying out. There is a risk of injury.
Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape.
X Park the vehicle on a level surface.
Only check the coolant level when the vehi-
cle is on a level surface and the engine has
cooled down.
X Turn the SmartKey to position 2 in the igni-
tion lock (
Y
page 147).
or
X
Press Start/Stop button twice
(
Y
page 147).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
X Turn the SmartKey to position
0 (
Y
page 147) in the ignition lock.
or
X
Remove Start/Stop button from ignition
lock (
Y
page 147).
X Slowly turn cap : half a turn counter-
clockwise to allow excess pressure to
escape.
X
Turn cap : further counter-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 0.6 in
(1.5 cm) above marker bar = in the filler
neck when warm, there is enough coolant
in expansion tank ;.
X
If necessary, add coolant that has been tes-
ted 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 395).
Adding washer fluid to the windshield
washer system
G WARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
G WARNING
Windshield washer concentrate could ignite if
it comes into contact with hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
X To open: pull cap : upwards by the tab.
X Place cap : on the edge of the filler neck
and engage in place.
Engine compartment
323
Maintenance
and
care
Z