Mercedes-Benz 600 SEL 1993 Owner's Manual page 90

Emission Control
Certain systems of the engine
serve to keep the toxic compo­
nents of the exhaust gases within
permissible limits required by law.
These systems, of course, will
function properly only when
maintained strictly according to
factory specifications. Any adjust­
ments on the engine should,
therefore, be carried out only by
qualified Mercedes-Benz techni­
cians. Engine adjustments should
not be altered in any way. More­
over, the specified service and
maintenance jobs must be carried
out regularly according to
Mercedes-Benz servicing
requirements. For details refer to
the Maintenance Booklet.
88
Warning!
Inhalation of exhaust gas is
hazardous to your health. All
exhaust gas contains carbon
monoxide, and inhaling it can
cause unconsciousness and
lead to death.
Do not run the engine in con­
fined areas (such as a garage)
which are not properly venti­
lated. If you think that exhaust
gas fumes are entering the ve­
hicle while driving, have the
cause determined and cor­
rected immediately. If you
must drive under these condi­
tions, drive only with at least
one window fully open.
On-Board Diagnostic System
The Sequential Multiport Fuel
Injection (SFI) control module
monitors emission control
components that either provide
input signals to or receive output
signals from the control module.
Malfunctions resulting from
interruptions or failure of any of
these components are indicated
by the ''CHECK ENGINE" mal­
function indicator lamp in the
instrument cluster and are simul­
taneously stored in the SFI control
module.
If the '' CHECK ENGINE" malfunc­
tion indicator lamp comes on,
have the system checked at your
authorized Mercedes-Benz dealer
as soon as possible.
An on-board diagnostic connector
with pushbutton and light emitting
diode (LED) is located on the
engine compartment firewall,
allowing the accurate identification
of system malfunctions through
the readout of diagnostic trouble
codes.