My 96 C220's temp gauge, gas, speedodometer,and tacodometer are not working. on 1996 Mercedes-Benz C220

I went on a trip last week, all of a sudden it was working. I stopped to get gas, when I started the car to leave the gag station it wasn't working again. the digital milage and trip odometer along with lights work fine. Where do I start, the radiator was replaced recently.

2 answers
maybe you have a loose connection
it works sometime