Hi - I have a 1995 E320 wagon that began giving me crank, no-start problems yesterday. Would not start after work last night, cranking but giving me a bouncing tach needle. I got it to start after turning the ignition to on for 90 seconds, turning it off, and then it started. ASR light was on but surprisingly no driveability problems for the 15 mile ride home.

Would not start again this morning, battery fully charged, cranks but no start, and now the tach does not move. Tried to pull the codes with a code reader that I have used successfully before. Ignition to on, plug in reader, and the LED comes on dimly before pressing the button. Press the button and it comes on full brightness; release and LED goes back to dim with no blinks.

Disconnected and reconnected battery, still the same.

Have searched a number of sites and have come up empty. What would cause the diagnostic system to act this way? Bad OVP relay?

Note: I have had previous intermittent ASR lights with the reduced power symptoms, but I have always been able to pull the codes. I have a replacement ETA to install but have been waiting for warmer weather (winter is still here in Mass.)

Thanks in advance for any advice on this.