Mercedes-Benz 260 E 124 1988 Owner's Manual page 71

Emission Control
Certain systems of the engine serve to
keep the toxic components of the ex­
haust 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 engine
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.
Warning!
Inhalation of exhaust gas is haz­
ardous to your health. All exhaust
gas contains carbon monoxide, and
inhaling 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 entering
the vehicle while driving, have the
cause determined and corrected
immediately. If you must drive un­
der these conditions, drive only
with at least one window fully open.
On-Board Diagnostic System
(California models only)
The CIS-E control unit monitors em is­
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 emitting diode
(LED) is located on the engine com ­
partment firewall, allowing the accu­
rate detection of system malfunctions.