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X
Using a rag, slowly open cap :
approximately
1
/
2
turn counterclockwise
to relieve excess pressure.
X
Continue turning cap : counterclockwise
and remove it.
The coolant level is correct if the level
R
for cold coolant: reaches marking bar
= in coolant expansion tank ;
R
for warm coolant: is approximately 0.6 in
(1.5 cm) higher
X
Add coolant as required.
X
Screw cap : back on and tighten it.
For more information on coolant, see the
“Technical data” section (Y page 538) and
(Y page 542).
Washer system and headlamp
cleaning system
G
Warning!
Washer solvent/antifreeze is highly
flammable. Do not spill washer solvent/
antifreeze on hot engine parts, because it may
ignite and burn. You could be seriously
burned.
!
Always use washer solvent/antifreeze
where temperatures may fall below
freezing point. Failure to do so could result
in damage to the washer system/fluid
reservoir.
!
Only use washer fluid which is suitable for
plastic lenses. Improper washer fluid can
damage the plastic lenses of the
headlamps.
!
Do not use distilled or deionized water in
the washer fluid reservoir. Otherwise, the
washer fluid level sensor could be
damaged.
Fluid for the washer system and the headlamp
cleaning system is supplied from the washer
fluid reservoir.
During all seasons, use MB Windshield
Washer Concentrate “MB SummerFit”. Mix it
with water or premixed washer solvent/
antifreeze depending on the ambient
temperature (Y page 544).
Example illustration: S 550 with AIRMATIC
Vehicles with Active Body Control (ABC)
X
Opening washer fluid reservoir: Pull tab
of cap : upwards.
X
Refill the washer fluid reservoir.
X
Closing washer fluid reservoir: Press
cap : onto filler hole until it engages.
For more information, see “Washer system
and headlamp cleaning system”
(Y page 539).
Brake fluid level
!
If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum
mark or below, have the brake system
checked for brake pad thickness and leaks
immediately. Contact an authorized
Engine compartment
409
Operation
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