Intermittent electrical speedo failure and engine cut out.
Speedo arm does not move off zero, then next start-up, everything normal. Engine can just die on long hill ( with A/C on). Not steep. Shut everything off, restart and all goes as usual. Cyclical metallic 'ter-tink' sound about once very two minutes. Not related to speed of engine. Has been like this a long time and has not varied or got worse/better. Car just driven for short hops and parked on slight slope.