Operational Monitoring; Charge Current; Engine With Two Buttons - Mercedes-Benz OM 904 LA Operating Instructions Manual

Operation
38
speed. The engine speed can be increased
up to the limiting speed.
X
To stop the engine: press Start/Stop but-
ton : again.
The engine switches off.

Engine with two buttons

X
To start the engine: press start but-
ton ;.
The engine starts and runs at engine idling
speed.
X
To increase the engine speed: while the
engine is running, press start button ;
again and hold it down until the desired
engine speed is reached.
After releasing start button ;, the engine
continues to run at the currently set speed.
The engine speed can be increased up to
the limiting speed.
X
To stop the engine: while the engine is
running, press stop button :.
The engine switches off.
X
To turn the engine over without starting
it: press and hold start button ; and stop
button : at the same time.
The engine turns over without starting.
X
Release start button ; and stop but-
ton :.
The engine remains at a standstill.

Operational monitoring

Charge current

The charge current indicator lamp must go
out after the engine has started.
Example: charge current indicator lamp
If the # indicator lamp does not go out, or
if it lights up while the engine is running,
switch off the engine and check the poly-V-
belt.
! Make sure that the poly-V-belt contact
surfaces are not damaged (e.g. torn), oily
or glazed, as this could cause the poly-V-
belt to slip. Do not run the engine without
a poly-V-belt. Otherwise, the alternator and
coolant pump are not driven, which results
in engine damage.
Further information can be found in the
"Checking the poly-V-belt for wear"
( Y page 67) and "Replacing the poly-V-belt"
sections ( Y page 95).
Electronic engine control unit
The electronics warning lamp must go out
after the engine has started.