Oil Pressure Gauge; Coolant Temperature Gauge; Emission Control; Engine Oil Consum Ption - Mercedes-Benz 300 D 1984 Owner's Manual

Safe D riving

Oil Pressure Gauge

The oil pressure may drop at idle
speed to 0.3 bar/4.4 psi if the engine
is at operating tem perature. This will
not jeopardize its operational reliabil­
ity. Pressure must, however, rise
[ immediately upon acceleration.
I The oil pressure gauge will not
provide early warning of low oil level.
Therefore, check oil level at regular
intervals with the dipstick.

Coolant Temperature Gauge

Due to the pressurized cooling
system, the coolant only starts boiling
at a tem perature of approx. 125° C/
257° F with an anti-corrosion/anti­
freeze-blended coolant fill protecting
down to —30° C l — 22° F (see also
" Fuels, Coolants, Lubricants, e tc." ).
During severe operating conditions
and stop-and-go city traffic the
coolant tem perature m ust not rise
above the red marking.
50

Emission Control

Certain system s of the engine serve
to keep the toxic com ponents of the
exhaust gases within perm issible
limits required by law. (Nevertheless,
we urgently advise you not to let the
engine run in a closed garage.) These
system s, of course, will function
properly only when maintained strictly
according to factory specifications.
Any adjustm ents on the engine
should, therefore, be carried out only
by qualified MERCEDES-BENZ te ch ­
nicians. The adjustm ents of the
engine should not be altered in any
way. Moreover, the specified service
and maintenance jo bs m ust be
carried out regularly according to
MERCEDES-BENZ servicing require­
ments. For details refer to the
Maintenance Booklet.

Engine Oil Consum ption

Engine oil consum ption can only be
determ ined after a certain mileage
has been covered. During the break-
in period, higher oil consum ption may
be noticed and is normal.