My speedo and odometer stopped working yesterday.

I have 270,810 miles on the beast.

Could something other than the cluster be to blame?

My trip odometer hasn't worked since I bought it about 18 mos. ago.

I was watching the speedo as it fell to zero.

It happened right after a sustained period of over 3K rpm on an on-ramp.

A split second after the speedo needle fell to zero something bounced up under my car.

It could have been debris from the road but is there anything that could have broken/fallen off associated with the failure of the speedometer/odometer?

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1993 W124 300D
-297K on the clock as I type this.