Mercedes-benz 2003 C-Class User Manual download pdf (Page 336)

336

Technical data

Fuels, coolants, lubricants etc.

Coolants

The engine coolant is a mixture of water

and anticorrosion/antifreeze, which pro-

vides:

앫 Corrosion protection

앫 Freeze protection

앫 Boiling protection (by increasing the

boiling point)

The cooling system was filled at the factory

with a coolant providing freeze protection

to approximately -22°F (-30°C) and corro-

sion protection.

If the antifreeze mixture is effective

to -22°F (-30°C), the boiling point of the

coolant in the pressurized cooling system

is reached at approximately 266°F

(130°C).

The coolant solution must be used

year-round to provide the necessary corro-

sion protection and increase boil-over pro-

tection. You should have it replaced every

15 years or 150000 miles (250000 km),

whichever comes first. Coolant system

design and coolant used stipulate the

replacement interval. The above replace-

ment interval is only applicable if

MB 325.0 anticorrosion/antifreeze

solution or other Mercedes-Benz approved

products of equal specification (see

Factory Approved Service Products pam-

phlet) are used to renew the coolant con-

centration or bring it back up to the proper

level.

To provide important corrosion protection,

the solution must be at least 45% anticor-

rosion/antifreeze [equivalent to freeze

protection to approx. -22°F (-30°C)].

If you use a solution that is more than 55%

anticorrosion/antifreeze [freeze protec-

tion to approx. -49°F (-45°C)], the engine

temperature will increase due to the lower

heat transfer capability of the solution.

Therefore, do not use more than this

amount of anticorrosion/antifreeze.

If the coolant level is low, water and

MB 325.0 anticorrosion/antifreeze should

be used to bring it up to the proper level

(have cooling system checked for signs of

leakage). Please make sure that the mix-

ture is in accordance with label instruc-

tions.

The water in the cooling system must meet

minimum requirements, which are usually

satisfied by normal drinking water. If you

are not sure about the water quality, con-

sult your authorized Mercedes-Benz

Center.

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