Our 1993 W124 500E won't even crank-over.

When I turn the ignition switch, everything has power, lights works, gauges
work, fuel-pumps start whirring, but nothing at the starter.

No sound of a solenoid clicking. Battery fully-charged, lights don't even dim
when attempting to crank. I measure 13.3 VDC at the B+ distribution block. I moved the tranny lever to Neutral and up & down to see if its is the neutral safety switch, but I'm not sure how to "jumper"/bypass this switch.

What's the test procedure and points/areas to check for voltage to the starter ?

I found a 3-pole connector near the CAN/LH electronics, which supposedly goes between the ignition switch and starter solenoid, but I don't know how or what leads to test for voltage.

The factory CD-ROM is poor here.

BTW: 3-months ago, I replaced the ignition tumbler, switch, and locking assembly with NEW MB OE parts.

TIA,
:-( neil