Greetings. I am having a rough idle condition with my 92 500E. I have replaced the upper wiring harness, spark plugs, cleaned and inspected the rotors and caps (ok). The plug wires are new as well. The car will also occasionally idle very low and stall.

I have the ABS and ASR light on intermittantly. I think I am narrowing it down to the EZL module. I am curious if I can diagnose this device myself. There is a 3-pin connector on it, which I can pull with the car running and have no effects good or bad. Normal?

Thoughts/Suggestions/Comments are appreciated! Thanks!

i doubt it is the EZL, check the wiring harness that goes to the throttle actuator, i have found that when the engine harness is,or in your case was cracked so is the harness to the actuator. be careful if you mess with it if you are not ready to replace it you make make your problem worse.

The EZL must create the same "dwell" signal to both coils!

Have you checked that???

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I can't say as I have. How would I do that?