Mercedes-Benz C-Clas 2016 Owner's Manual page 315

Engine compartment
312
cap, you could be scalded if hot coolant
sprays out. There is a risk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Open
the cap slowly to release the pressure.
G
WARNING
If you open the bonnet while the engine is
overheating or while there is a fire in the
engine compartment, you could come into
contact with hot gases or other leaking ser-
vice products. There is a danger of injury.
Allow an overheating engine to cool down
before opening the bonnet. If there is a fire in
the engine compartment, leave the bonnet
closed and notify the fire brigade.
Checking the coolant level
Check the coolant level (example)
Park the vehicle on a level surface.
X
Check the coolant level only if the vehicle is
on a level surface and the engine has cooled
down.
Turn the key to position 2 in the ignition lock
X
( page 133).
Y
or
Press the Start/Stop button twice on vehicles
X
with KEYLESS-GO or the KEYLESS-GO start
function ( page 133).
Y
Check the coolant temperature display on the
X
instrument cluster (
The coolant temperature must be below
70 †.
page 221).
Y
Turn the key to position 0 in the ignition lock
X
( page 133).
Y
or
Press the Start/Stop button once on vehicles
X
with KEYLESS-GO or the KEYLESS-GO start
function ( page 133).
Y
Slowly turn cap : half a turn anti-clockwise
X
and allow excess pressure to escape.
Turn cap : further anti-clockwise and
X
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 ;.
If necessary, top up with coolant that has
X
been tested and approved by Mercedes-Benz.
Replace cap : and turn it clockwise as far as
X
it will go.
Further information on coolant (
Topping up the windscreen washer sys-
tem
G
WARNING
If windscreen washer concentrate comes into
contact with hot components of the engine or
the exhaust system, it can ignite. There is a
risk of fire and injury.
Make sure the windscreen washer concen-
trate does not come into contact with the filler
neck.
Topping up the windscreen washer system
(example)
page 366).
Y