Hi,
The check engine light on my 93 190 e 2.3 is on. I decided to check the code on the little unit in the battery compartment. So with the key on (engine off) I pressed that little button for 4 secs & released it and waited...the red light does not blink at all. I tried for longer periods but no luck. The red light just does not come on. Any ideas ???? Please advise. Thanks

smk_texas
98 s420 - 53k
93 190e 2.3 149k