Hi,
I just found out about the code scanner by the battery on my 1995 E320 wagon. It worked once and has not worked since then.
By not working I mean with the key on, but the car not running, I press the button for 2 to 3 seconds and the led lights up but when I let go
I get no response. No blinking back except the very first time I tried it a week ago. The car has been run every day for the last week. I have tried with the car running, with all the idiot lights on and with the idiot lights off. Most times I try it with all the idiot lights on because that is how it worked
the very first time I used it and it worked. Anyone know what I am doing wrong or seen this before?

Thanks very much,
Jim Lee

 

THE ENGINE SHOULD BE RUNNING.