Driver Seat not working on 1995 Audi A6 Quattro

I dont know why but my drivers seat seems to stop working, and then randomly starts working weeks or months later for a very short period of time, my passenger side power seat works perfectly.
Any suggestions

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1 answer
do all the functions stop working? back, fore, up, down, tilt? if all are out check the circuit breaker (i think its under the hood or poss under dash). if only 1 or 2 funtions are inop is the switch ok? if the cap falls off the switch and is not put back correctly it can hinder operation.