Renewing Coolant - Mercedes-Benz OM 904 LA Operating Instructions Manual

Maintenance
Work schedules

Renewing coolant

Risk of injury
The cooling system is pressurised. Hot cool-
ant can escape under pressure when the
cooling system is opened and scald your
skin and eyes.
Only open the cooling system at coolant
temperatures below 90 °C.
Unscrew the cap slowly and release any
5 excess pressure completely before
opening the cap fully.
Wear suitable protective gloves, protec-
tive clothing and safety goggles when
handling coolant.
92
Risk of poisoning
G
There is a risk of poisoning if coolant is swal-
lowed.
Never swallow coolant.
Never store coolant in containers nor-
mally used for beverages.
Store coolant out of the reach of chil-
dren.
!
Only use antifreeze/corrosion inhibitor
approved by Mercedes-Benz, (see
specifications for service products).
i
Before renewing the coolant, check the
cooling and heating system for leaks
and condition. Have the coolant renew-
al confirmed in the Maintenance Book-
let.
Draining coolant
G
1 Coolant drain plug
Open the engine cooling system cap
slowly, relieving the excess pressure,
and remove it.
On heating systems: open the heating
temperature selectors (regulating
valves).