DOES anyone know where speed sensor is connected ? CONNECTED A DRILL TO SPEEDO CABLE GAUGE MOVES . REPLACED BOTH CABLES STILL DOESNT TURN THINKING THERES A SPEED SENSOR

If you have a cable, it's a mechanical drive. I think the first ones with the electronic speedo were the W126 in the 80s. Probably a failed or stripped drive gear in the transmission tailpiece.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
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1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]