Doesn’t matter any more. I fixed the problem myself. I held down the button in the speedometer then switched on the ignition while holding down the button, after a period of around 10 seconds the display flashed and then displayed 21000 miles until next service. Don’t know if this is the way you should do it, i.e. whether I did too many things or something that wasn’t necessary, but it worked.
Dave, December 2004