Dashboard out and ignition turns but nothing happens on 2001 Mercedes-Benz C240

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Dashboard lights are completly out and when you turn the ignition nothing happens. All other components like radio, fan and lights work fine. Just changed crankshaft position sensor and when restarted all dashboard and warning lights lights came on and wouldn't go off and the gauges would not work.
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Check the basics, like all the fuses etc. A new Crank Sensor should not need a software update on a 2001. I have done several on MBs
Checked all fuses, mechanic a dealership states I might need a new instrument panel because they do go out or it could be a ground wire problem caused when I changed the sensor.