Originally Posted by richard28

Just wanted to make sure I understood the basics for finding the cause of the CEL light in my 1993 300ce convertible: After I push the button, I count the light flashes and interpret them using the table [excerpted below] shown in post #1:

Emissions - Using Built-in Diagnostic Module
1 No Fault Found
2 Heated oxygen sensor faulty
3 Lambda control faulty
4 Air injection system faulty hot film mass air flow sensor with hot wire
5 Exhaust gas recirculation faulty
6 Idle speed control faulty
7 Ignition system faulty
8 Engine coolant temperature sensor open circuit
9 Intake air temperature sensor, open circuit
10 Voltage at mass air sensor too high/low.

Thanks.