Mercedes-Benz 420 SEL 1988, Руководство пользователя

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Certain systems of the engine serve
to keep the toxic components of the
exhaust gases within permissible
limits required by law.
These systems, of course, will func­
tion properly only when maintained
strictly according to factory specifica­
tions. Any adjustments on the engine
should, therefore, be carried out only
by qualified MERCEDES-BENZ tech­
nicians. The adjustments of the en­
gine should not be altered in any way.
Moreover, the specified service and
maintenance jobs must be carried out
regularly according to MERCEDES-
BENZ servicing requirements. For de­
tails refer to the Maintenance Booklet.
Emission Control
Inhalation of exhaust gas is hazard­
ous to your health. All exhaust gas
contains carbon monoxide, and in­
haling it can cause unconscious­
ness and lead to death.
Do not run the engine in confined
areas (such as a garage) which are
not properly ventilated. If you think
that exhaust gas fumes are enter­
ing the vehicle while driving, have
the cause determined and correc­
ted immediately. If you must drive
under these conditions, drive only
with at least one window fully open.
Warning!
On-Board Diagnostic System
(California models only)
The CIS-E control unit monitors emis­
sion control components that either
provide input signals to or receive
output signals from the control unit.
Malfunctions resulting from interrup­
tions or failure of any of these compo­
nents are indicated by the “CHECK
ENGINE” indicator lamp in the instru­
ment cluster and are simultaneously
stored in the CIS-E control unit.
If the “CHECK ENGINE” indicator
lamp comes on, have the system
checked at your authorized
MERCEDES-BENZ dealer at the
first opportunity.
An on-board test connection with
pushbutton and light emiting diode
(LED) is located on the engine com­
partment firewall, allowing the accu­
rate detection of system malfunctions.
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