Following a cluster repair, i find myself needing to recalibrate the trip computer. Currently I have no 'distance to empty' or 'average fuel' figures. Also the cruise control won't lock a speed in. The new computer was originally in a v6, it's now in a v8. I have been told a scan tool can do it but can't find anyone who has a device capable of performing this upgrade. Is it a job for a sparky perhaps? I've read in other t hreads that pressing and holding certain buttons can fix things. Is this true? Car is a vr calais.