Mercedes-Benz 300 TD-TURBO DIESEL 1985, Owner'S Manual

Page: 90 / 97

Fuels Coolants Lubricants etc.
Coolants
The engine coolant is a m ixture of
w ater and anticorrosion/antifreeze,
w hich provides:
• corrosion protection
• freeze protection
• boiling protection (by increasing
the boiling point).
The cooling system was filled at the
factory w ith a coolant providing freeze
p rotection to —30° C / — 22° F and
corrosion protection. The red area of
the tem perature gauge is matched to
the heating properties of this coolant
solution.
The coolant solution m ust be used
year round to provide the necessary
corrosion protection and increase in
the boil-over protection. You should
have it replaced every 3 years.
To provide the im portant corrosion
protection, the solution m ust be at
least 33 % anticorrosion/antifreeze
(equals a freeze p ro te ctio n to
— 20° C / — 4° F). If you use a solution
th a t is m ore than 55 % a n tico rro ­
sion/antifreeze (freeze p rotection to
— 40° C/ —40° F), the engine te m p e r­
ature will increase due to the lower
heat transfer capability of the solu­
tion. Therefore, do not use more than
this am ount of a n tico rro sio n /a n ti­
freeze.
If the coolant level is low, w ater and
M-B a n ticorrosion/antifreeze (or
equivalent) should be used to bring it
up to the p roper level (have cooling
system checked fo r signs of leakage).
The w ater in the cooling system must
m eet mimimum requirem ents, which
are usually satisfied by normal drink­
ing water. If you are not sure about
the w ater quality, co n su lt your author­
ized MERCEDES-BENZ dealer.
A ntico rro sio n /a n tifre e ze
Y our vehicle contains a num ber of
aluminium parts. The use of alumin­
ium com ponents in m otor vehicle
engines necessitates that a n tico rro ­
s io n /a n tifre e ze /co o la n t used in such
engines be specifically form ulated to
p ro te c t the aluminium parts. (Failure
to use such a n tico rro sio n /a n ti­
fre e ze /co o la n t may result in a signifi­
cantly shortened service life.)
While there may be a num ber of
antico rro sio n /a n tifre e ze /co o la n ts
available w hich will provide the requi­
site protection, all such products
have not been tested for
MERCEDES-BENZ vehicles.
The following product, however, is
recom m ended fo r use in your car:
MERCEDES-BENZ. A n tico rro sio n /
Antifreeze Agent.
Before the start of the w inter season
(or once a year in the hot southern
regions), you should have the a n tico r­
rosion/antifreeze concentration
checked. The coolant is also regularly
checked each time you bring your
vehicle to your authorized
MERCEDES-BENZ dealer fo r m ainte­
nance service.
Freeze A n tico rro sio n /
p rotection antifreeze
5.50 1/5.8 US qt
6.50 1/6.9 US qt