Only check the coolant level and/or fill the cool‐
ant if the vehicle is stationary, on a level surface
and the engine has cooled down. The coolant
temperature must be below 122°F (50°C).
&
WARNING Risk of burns from hot com‐
ponent 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.
#
Coolant contains glycol and is therefore poi‐
sonous. Observe the information under
"Operating fluids and capacities"
(
/
page 230).
*
NOTE Paintwork damage due to coolant
If coolant gets on painted surfaces, the paint‐
work can be damaged.
#
Add coolant carefully.
#
Remove spilled coolant.
Regularly check the engine cooling system and
the heating system for leaks. If there is a loss of
coolant, have the cause determined and rectified
in a qualified specialist workshop without delay.
Example: cap and coolant expansion reservoir
Checking the coolant level
#
Slowly turn cap
1
of coolant expansion res‐
ervoir
2
half a turn counter-clockwise and
allow overpressure to escape.
#
Turn cap
1
further and remove it.
The coolant level is correct in the following cases:
R
Up to marker bar
3
when the engine is cold
R
If the engine is warm, up to 0.6 in (1.5 cm)
over marker bar
3
Adding coolant
Only use coolant approved for Mercedes-Benz to
avoid damaging the engine cooling system.
#
Refer to the information on coolant
(
/
page 230).
#
Refill the coolant up to marker bar
3
in the
filler opening of coolant expansion reservoir
2
.
#
Replace cap
1
and tighten in a clockwise
direction.
#
Start the engine.
#
Set the temperature in the vehicle interior to
the maximum output on the control panel of
the climate control.
#
After approximately five minutes, switch off
the engine again and allow it to cool down.
#
Check the coolant level again and add coolant
if necessary.
Refilling the windshield washer system
&
WARNING Risk of fire and injury from
windshield washer concentrate
Windshield washer concentrate is highly flam‐
mable.
#
Avoid fire, open flames, smoking and
the creation of sparks when using wind‐
shield washer concentrate.
&
WARNING Risk of burns from hot com‐
ponent 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.
*
NOTE Damage to the exterior lighting
due to unsuitable windshield washer fluid
Unsuitable windshield washer fluid may dam‐
age the plastic surface of the exterior lighting.
#
Only use windshield washer fluids that
are also suitable for use on plastic sur‐
Maintenance and care 181
