There has been well-intentioned but misleading advice in this forum that the heater control panel from a MK4 Golf (with a part number beginning with 1J) can be adapted to fit a post-99 T4. I'm not alone in making the mistake of buying a MK4 Golf panel only to find there is no way it could ever be made to fit. The front looks the same but the electrical connections are totally different and the outer sheaf of the control cable is secured differently. I'm currently in dispute with an eBay seller who even listed a panel from a Golf as a T4 heater control panel. As far as I'm aware only a genuine post-99 T4 control panel (ie with a part number beginning with 7O) will fit and these seem to be almost as rare as hens teeth or rocking horse poo.