My 2009 X Type SE is fitted with the full touch screen kuit of sat nav, phone, CD/radio etc.  But there is no connection for MP3 or IPod.  Does anyone know of a modification or kit which can convert so that I can play my IPod through the in car system please. ?

Jaguar ACM (Audio Connectivity Module) is the official solution, but it's expensive. Extra info here. Alternatives:

• An aftermarket headunit - best functionality but might not fit the interior in an aesthetic sense, steering wheel controls may or may not work
• Parrot kit like the MKi9000/9100/9200 - mainly for bluetooth handsfree but also provides music connectivity, has its own 20W amplifier which may not be enough for everybody, steering wheel control adapter available
• One of the many RDS-adapters that you hook directly to the radio antenna

I've done the following mod, but unfortunately there's no certainty it can be done with the CD player or not.
http://www.jaguarforum.co.uk/f26/how-diy-headunit-hack-aux-tape-deck-57182.html