First of all I've not got a clue when it comes to this stuff and I realise the man to see / speak too is EDDIE but I'm a little to far away on the south coast! If I can purchase some tdi high line clocks for my tdi how easy is the fit? Do I need to change any modules? Does it matter what millage they read? I suppose they have to be coded! Will the milage read the same as mine once done? I have the kenwood dnx520 fitted, would any info display on the new clocks? So many questions and no answers!!!