Hi all, John here, so I'm trying to get a 2nd opinion here, I've posted on Benzworld with this issue, any help/opinions would be appreciated! . I have a 1991 500SL Ca version 129.066 37K miles, issue I've been having started 7 months ago and now its gotten bad, started with dreaded dash flash and car stalling at rolling stop. I thought issue was low voltage to systems, and it was, had below 12v at idle with any accessories on, so replaced battery and alternator,OVP, all fuses, also replaced dist caps and updated rotors, now have a healthy 13.82V running voltage, but car is stalling big time now. I can crank and no start, all cluster lights are off with key in #2 position?, I can remove key and reinsert a few times and instrument lights come on and car starts and runs fine. In the last 4 days I built a led code reader and ran codes, code 17 CPS keeps coming back, I've been told its possibly a bad EZL, or ignition switch, I've been told to check for voltage from ignition switch to EZL with a test light, dim light= bad ignition switch, not sure which wire has the voltage on EZL? so its been narrowed down between EZL and ignition switch, I don't think the CPS would disable all instrument lights? its been suggested that plastic ignition switch connector gets loose contacts, also I've been told brake light switch can cause issues?

I'm going to start testing today, a electrical schematic for power feed from switch to EZL would be handy! here's a video I made of issue, thanks John.
https://www.youtube.com/watch?v=uC9_7v7Ie5I

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John