2004 Mercedes E-Class Owner's Manual - Page 405
2004 Mercedes E-Class Manual
Page 405 highlights
Technical data Fuels, coolants, lubricants etc. Damage or malfunctions resulting from poor fuel quality or from blending specific fuel additives are not covered by the Mercedes-Benz Limited Warranty. Coolants The engine coolant is a mixture of water and anticorrosion/antifreeze, which provides: Corrosion protection Freeze protection 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 corrosion 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 corrosion protection and increase boil-over protection. Refer to Service Booklet for replacement interval Coolant system design and coolant used stipulate the replacement interval. The replacement interval published in the Service Booklet is only applicable if MB 325.0 anticorrosion/antifreeze solution or other Mercedes-Benz approved products of equal specification (see Factory Approved Service Products pamphlet) are used to renew the coolant concentration or bring it back up to the proper level. To provide important corrosion protection, the solution must be at least 45% anticorrosion/antifreeze [equivalent to freeze protection to approximately - 22°F (-30°C)]. If you use a solution that is more than 55% anticorrosion/antifreeze [freeze protection to approximately - 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. 405