Gasoline Additives; Coolants - Mercedes-Benz 2003 CLK 430 Operator's Manual

Instruments
Operation
and controls
Fuels, coolants, lubricants etc.

Gasoline additives

A major concern among engine manufacturers is carbon
build up caused by gasoline. Mercedes-Benz
recommends the use of only quality gasoline containing
additives that prevent the build up of carbon deposits.
After an extended period of using fuels without such
additives, carbon deposits can build up especially on the
intake valves and in the combustion area, leading to
engine performance problems such as:
• Warm-up hesitation
• Unstable idle
• Knocking/pinging
• Misfire
• Power loss
Do not blend other specific fuel additives with fuel.
They only result in unnecessary cost, and may be
harmful to the engine operation.
Damage or malfunctions resulting from poor fuel
quality or from blending specific fuel additives are not
covered by the Mercedes-Benz Limited Warranty.
Instrument
Driving
cluster display
320
Practical hints Car care

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. 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 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.
Technical
Index
data