C Oolants - Mercedes-Benz 350 SDL TURBO 1991 Owner's Manual

C o o lants
T he en gine co o la n t is a m ixture of
w a te r and an ticorro sion /a ntifree ze,
w hich provides:
• corro sion protection
• freeze protection
• boiling pro te ction (by increasing
the boiling point).
T he cooling system w as filled at the
factory w ith a coo la nt providing freeze
protection to approx. -3 0 ° C (-2 2 °F )
and corrosion protection.
T he coo la nt solution m ust be used
year round to provide the necessary
corrosion protection and increase in
the b o il-o ver protection. You should
have it replaced every 3 years.
To provide the im portant corrosion
protection, the solution m ust be at
least 40 % an ticorro sion /a ntifree ze
(equals a fre e ze protection to approx.
- 2 5 ° C [-1 3 °F ]). If you use a s o lu ­
tion th a t is m ore than 55 % a n tico rro ­
sio n/an tifre eze (freeze protection to
approx. -4 5 ° C [^ t9 ° F ]), the engine
tem p e ra tu re will in crea se due to the
106
low er heat tra n sfe r cap ab ility of the
solutio n. T here fore, do not use m ore
than this am o un t of a n tico rro sio n /
antifreeze.
If the co o la n t level is low, w a te r and
M B an tico rro sio n /a n tifre e ze should be
used to bring it up to the p ro pe r level
(have coo lin g system che cked for
signs of leakage).
The w a te r in the cooling system m ust
m eet m inim um requirem ents, w hich
are usually satisfied by norm al
drinkin g w ater. If you are not sure
ab ou t the w a te r quality, con sult your
au thorized M E R C E D E S -B E N Z dealer.
A n tico rro sio n /a n tifre e ze
Y o u r veh icle con tain s a nu m be r of
alum in um parts. T he use o f alum inum
c o m p o n e n ts in m otor veh icle engines
n e cessita te s th a t a n ticorro sion /
a n tifre e ze co o la n t used in such
e n g in e s be spe cifica lly fo rm ulated to
pro te ct the alum in um parts. (F ailure to
use such a n tico rro sio n /a n tifre e ze
coo la nt w ill resu lt in a sig nifica ntly
shortened service life.)
T here fore the follow ing pro du ct is
strong ly reco m m en ded fo r use in
you r car: M E R C E D E S -B E N Z A n tico r­
rosion /A n tifre eze A gent.
B efore the start of the w in te r season
(or once a yea r in the hot southern
regions), you should have the a n tic o r­
rosion /a ntifree ze con cen tra tion
checked. T he co o la n t is also regularly
che cked each tim e you bring your
veh icle to you r au thorized
M E R C E D E S -B E N Z d e aler for m ainte­
nance service.
A pprox. freeze A n tico rro sio n /
protection antifreeze
4.50 I (4.8 US qt)
5.50 I (5.8 US qt)