i have a t reg wagon aswell and my digi clock dosent work either,it comes on from time to time,normally on a long run after a bit of a blast. it is enoying and i hope there is some good response to this as we both have the same damn problem.even when it comes on it dosent last very long,sorry i cant be of help but someone on here must know what the problem is!

hopefully u get some good replys soon.