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324 Maintenance and care
Topping up the windscreen washer system /
headlamp cleaning system
& WARNING ‑ Risk of fire and injury due to
windscreen washer concentrate
Windscreen washer concentrate is highly
flammable. It could ignite if it comes into con‐
tact with hot engine component parts or the
exhaust system.
Make sure that no windscreen washer
#
concentrate spills out next to the filler
opening.
Topping up the washer fluid
Depending on the vehicle version, the washer
fluid reservoir for the windscreen washer system
and the headlamp cleaning system has a capacity
of approximately 10 l or 15 l.
If the washer fluid level in the washer fluid reser‐
voir is too low, the on-board computer will display
a grey event window containing the ¥ symbol.
A windscreen washer concentrate according to
Mercedes-Benz Specifications for Service Prod‐
ucts sheet no. 371.0 may be added to the washer
fluid all year round. Adapt the mixing ratio to the
outside temperature.
At temperatures above freezing, add a wind‐
screen washer concentrate for the summer to
prevent smearing. If there is a risk of frost, use a
windscreen washer concentrate for winter to pre‐
vent the washer fluid from freezing on the wind‐
screen.
Pre-mix the washer fluid to the correct mixing
#
ratio in a container.
Open the maintenance flap (
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Unscrew and remove the cap
#
washer fluid reservoir.
Refill the washer fluid reservoir.
#
Replace the cap
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Close the maintenance flap.
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Cleaning the cyclone dust pre-separator
* NOTE Tapping, blowing or washing out
The filter elements for the engine air cleaner
must not be cleaned.
Tapping, blowing or washing out the filter
medium could lead to structural changes and
damage:
R
R
R
#
The cyclone dust pre-separator is integrated in
the intake port and extends the non-operational
time of the air filter under dusty conditions.
Dust particles escape from the intake port on the
extraction valves
nate the air filter. Dust particles can collect in the
extraction valves 1, it is for this reason that the
extraction valves
/
page 321).
If the vehicle is frequently driven in dusty environ‐
ments, the valves should be emptied at least
1
and screw it on.
the air filter could damage the engine air
cleaner.
in this case, the required separation effi‐
ciency of the filter element can no longer
be guaranteed.
this may lead to increased wear and a
reduced engine service life.
the implied warranty will be rendered
invalid.
Renew air filter elements.
1
in order not to overcontami‐
1
should be emptied regularly.
1
of the
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