cynic formulated the question :

Have we anyone in our numbers who have knowledge of the engine
management system on a Discovery 2.5 Diesel and is it feasible to get
hold of the commes interrogation software to run on my own laptop?

Best source for information would be a Land Rover specialist group web
site.

You can get the adaptor and software for most cars, but you would be
best to find out which of the many works best with your model.

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Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk