Mercedes Benz 2003 e 320 User Manual

Damage or malfunctions resulting from 
poor fuel quality or from blending specific 
fuel additives are not covered by the 
Mercedes-Benz Limited Warranty.

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 cool-
ant 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 150 000 miles (250 000 km), 
whichever comes first.

Coolant system design and coolant used 
stipulate the replacement interval. The 
above replacement interval is only applica-
ble if MB 325.0 anticorrosion/antifreeze 
solution or other Mercedes-Benz approved 
products of equal specification (see Facto-
ry Approved Service Products pamphlet) 
are used to renew the coolant concentra-
tion 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.