Mercedes-Benz 300D 2.5 1990, Owner'S Manual

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Starting and Turning Off the Engine
Before Starting
Engage parking brake and move the
selector lever to position “P”.
Cold Engine
Turn key to steering lock position 2.
Charge indicator and preglow indi­
cator lamp should come on. The
preglow process starts. When the
preglow indicator lamp goes out, the
engine is ready for starting.
Ambient temperatures
above 0°C (+32°F):
Turn key in steering lock clockwise to
the stop. Do not depress accelerator.
Release key only when the engine is
firing regularly.
Ambient temperatures
below 0°C (+32°F):
Depress accelerator to the floor.
Turn key in steering lock clockwise to
the stop. Release key only when the
engine is firing regularly and back off
accelerator slowly.
Do not interrupt the starting process. If
the engine is very cold, it is possible
that it will fail to start on subsequent
attempts.
At ambient tem peratures below -1 8 °C
(0°F), depress accelerator three times
prior to starting.
Hot Engine
Turn key in steering lock clockwise to
the stop and start engine immediately
w ithout depressing the accelerator.
Turning off
Turn the key in the steering lock to
position 0 only when the vehicle has
stopped moving.
The key can only be removed with the
selector lever in position “P”.
Should the engine continue to operate
with the key in steering lock position 0,
refer to page 76.
If the coolant tem perature is very high
(e.g. after hard driving on mountain
roads), do not shut off the engine
immediately, allow it to run for
1 -2 minutes at increased idle speed
with selector lever in position “P".
Important!
Due to the installed starter non-repeat
feature, the key must be turned
completely to the left before attem pt­
ing to start the engine again.
Observe the oil pressure gauge im­
mediately after starting the engine. In
a very cold engine the oil pressure will
rise slowly. Do not speed up the
engine before pressure is registered
on the pressure gauge.
The battery charge indicator lamp
should go out as soon as the engine
has started.
If the preglow indicator lamp fails to
light up, or lights up while driving, the
preglow system is defective and
should be repaired at your authorized
MERCEDES-BENZ dealer at the
earliest possible date.
The engine is equipped with a block
heater to provide reliable starting at
tem peratures below -1 8 °C (0°F).
Refer to page 70.
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