Hi And thanks livefreeordie,
Ah, ok. Had been trying it with the door open.
Just tried with the door closed and followed this proceedure.
1: Put key into ignition, turned to position 1.
2: Pressed and held button (1).
3: Turned key to position 2.
4: After about 5 secs there was a "Peep" sound from the dash...............BUT no display reset.
5: Released button (1).
6: Turned key to position 0 and removed key.
It's a mystery...............
Thanks again for the reply.