I have spoken to mr andy hunter of tvnavman ,seems totally genuine honest guy ,he will fit widescreen and mk3 @1850 2yr warrenty all brand factory install same spec. Or wide mk3 tv tuner @2k. Or wide and mk4 @2350 .He suggested i go for 1850 with mk3 and if i like the nav etc then buy a mk4 on ebay and swap sell the mk3 on and save pounds .he said id get a mk4 around 400 and could sell the mk3 at around 150 ,would you know what my 2004 would have came with if i had ordered nav then ?mk3 i guess and i suppose i would have been happy am i being weird ?wanting the latest spec in the mk4 ,My next concern is if i fit mk4 i guess my 2yr warrenty is void ? ,how hard to swap a 3 for a 4 .Is the tuner worth having ? and im i correct in thinking mk would play dvds ? next as you may see 9k miles in 30 months hardly drive the x5 . is it worth bothering ? please help me decide