Starting The Engine For The First Time; Checking The Coolant Level; Refuelling; Refuelling With Adblue - Mercedes-Benz OM 904 LA Operating Instructions Manual

Example: OM 926 LA
X
Check the engine oil level with dip-
stick ;. The oil level should be between
the upper and lower marks on dipstick ;.
X
If necessary, use filler neck : to top up the
oil.
Only use engine oil which has been approved
for the engine and which meets the specified
SAE classification.
! Do not add too much oil. If you add too
much oil, the engine or the catalytic con-
verter could be damaged. Drain or siphon
off any excess oil.

Checking the coolant level

X
Check the coolant level as stated in the
vehicle/equipment operating instructions.
X
Fill the cooling system if necessary
Y
( page 50).

Refuelling

Use summer or winter fuel depending on the
season ( Y page 51).
! When refuelling ensure that conditions
are clean and do not allow water to enter
the tank and thus contaminate the fuel.

Refuelling with AdBlue

®
Only use AdBlue /DEF that complies with
DIN 70070/ISO 22241. Do not use any addi-
®
tives. If AdBlue /DEF comes into contact
with painted or aluminium surfaces, rinse the
affected surfaces immediately with plenty of
water.

Starting the engine for the first time

Starting the engine for the first time
X
Connect a power supply.
Carry out the work listed under "Preparing for
operation" before operating the engine for
the first time ( Y page 34).
Bleeding the fuel system
Bleeding, after refuelling a fuel system which
has been run dry, is performed the next time
the engine is started. Automatic continuous
bleeding takes place in the filter.
When the engine is started, the battery must
have sufficient charge to bleed the fuel sys-
tem.
Use the integrated hand pump
( Y page 86) to bleed the heated fuel prefil-
ter (with water separator) fitted to the vehicle
or equipment.
Checking the coolant level
X
Leave the engine running at a moderate
engine speed for approximately 5 minutes.
X
If the coolant temperature is less than
50 †, check the coolant level again. Add
coolant.
If a heating system is connected to the cool-
ing system, all heating system valves must be
open while the cooling system is being top-
ped up. Otherwise, there might be too little
coolant in the coolant circuit after it is filled.
Only close the heating system valves once the
engine has been running for a brief period
and, where applicable, the coolant has been
topped up.
Operation
®
/DEF
35