Thanks for your comments Randombloke. I want to do a straight replacement, like for like, of the multi-line displays not upgrading, or downgrading. I did search the forum for answers to my questions without success, hence my post. My supplementary question came up after I spoke to a Citroen dealer after my first posting. Your reply does raise a question:- How do I merge the threads? I am a newbie to these forums. Thanks for your help and patience.