The dual purpose display seems to be the most obvious explanation but it's funny that I have never noticed this before ...wonder if it's mentioned in the handbook ......must read it one day. The nearside heated mirror seems to have stopped working now, anyone else had this and is it a straight swap for a new one under warranty. has it become infected with the citroen build quality virus ..............nasty rattle in the rear quarter roof lining as well.....oh dear Thanks for the answers guys Cheers