Mercedes-Benz OM 457 LA Operating Instructions Manual page 75

When cleaning, never point the water jet
!
at the exhaust pipe. The system may oth-
erwise be damaged.
When using a high-pressure cleaner, keep
!
a minimum distance between the high-
pressure nozzle and the engine parts. Oth-
erwise, parts of the engine may be dam-
aged.
Observe the following minimum distances:
about 70 cm with round-spray jets
R
about 30 cm with 25° flat-spray jets
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about 30 cm with concentrated-power
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jets
Keep the water jet moving constantly
!
while cleaning. In this way, you will avoid
causing damage.
Do not point the water jet at:
electrical components
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plug connectors
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seals
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hoses
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Cleaning the engine
Observe the following notes when clean-
!
ing the engine. This avoids malfunctions
and damage to the engine.
When using high-pressure or steam
R
cleaners, do not point the spray directly
at electrical components and electric
cables.
Make sure that no water enters the air
R
intake and ventilation openings.
Treat the engine with preservative
R
agents after it has been cleaned. When
doing so, protect the belt drive system
from the preservative agent.
Only use wax-based protective agents
R
for engines that comply with
Sheet No. 385.4 of the Mercedes-Benz
Specifications for Service Products.
In addition, observe the notes in the "High-
pressure cleaning" section ( Y page 72).
Cleaning and care
73
Z