Maintenance and Service
Shutdown for a longer period of time
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Arrangements for shutdown of engine system OM936/471/473 for a period up to
6 month
In order to avoid sediments accumulation due to 7% biodiesel content in diesel fuel,
as well as consequential damages or problems during restart, which may result from
it, the following points must be noted during the machine shutdown additionally to the
actions pointed out in the Mercedes-Benz operating manual:
– Let the engine run monthly for approx. 10 minutes at max. 900min-
1
, with the air
conditioning and heating switched on.
– Always by all means check engine oil level and coolant level before start. Addition-
ally, drain the water separator at the engine and fuel prefilter.
– Always by all means monitor the oil pressure as well as coolant and oil temperature
when starting or during running the engine.
ADVICE
The monthly engine start can be omitted if the engine has been operated with FAME-
free fuel (B0-diesel fuel) and shut down. If the engine system has been operated pre-
viously with the standard diesel fuel according to DIN EN 590 with 7 % of bio-diesel
content, in this case it is sufficient to pump out all the remaining fuel from the tank
and fill in sufficient quantity of B0 fuel, but not less than 50 litres. Before shutdown the
engine system must be operated for at least 30 min. with this fuel, to flush all the fuel-
carrying components.
The B0 requirement is currently met by, for example, the fuels Aral Ultimate Diesel and
BP Ultimate Diesel.
These actions are valid in combination with the Mercedes-Benz operating instructions
as of 01-14 of the above mentioned engine series.
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