Mercedes-Benz 2009 SL-Class Operator's Manual page 210

Operation
Engine compartment
voir contains hot fluid and is under pres-
sure.
Using a rag, slowly open the cap approx-
R
1
imately / turn to relieve excess pres-
2
sure. If opened immediately, scalding hot
fluid and steam will be blown out under
pressure.
Do not spill antifreeze on hot engine
R
parts. Antifreeze contains ethylene gly-
col which may burn if it comes into con-
tact with hot engine parts.
Coolant expansion tank
1
208
X
Using a rag, turn the cap slowly approxi-
1
mately / counterclockwise to release any
2
excess pressure.
X
Continue turning the cap counterclockwise
and remove it.
The coolant level is correct if the level
for cold coolant: is up to the upper mark
R
on the bracing rib of the coolant expan-
sion tank (translucent)
for warm coolant: is approximately 0.6 in
R
(1.5 cm) higher
X
Add coolant as required.
X
Replace and tighten cap.
! SL 600 and SL 65 AMG: Only open the cap
on the coolant expansion tank. Never open
the cap between the two charge-air cool-
ers. Otherwise, the engine could be dam-
aged.
For more information on coolant, see the
"Technical data" section ( Y page 355).
Washer system and headlamp clean-
ing system
G Warning!
Washer solvent/antifreeze is highly flam-
mable. Do not spill washer solvent/anti-
freeze 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 freez-
ing point. Failure to do so could result in
damage to the washer system/fluid reser-
voir.
! Only use washer fluid which is suitable for
plastic lenses. Improper washer fluid can
damage the plastic lenses of the head-
lamps.
! Do not use distilled or de-ionized water in
the washer fluid reservoir. Otherwise, the
washer fluid level sensor could be dam-
aged.