Tried the spray technique. Was a wast of time. Bottled out of the solder method. Not because of the soldering but because of having to take the dial needles off. (had a bad experience with an Audio TT and dial needles )
Ended up sending the cluster away to the guy on eBay from Southampton. Charged me 80 quid for a superb job, all pixels working and had it back to me in a day. http://cgi.ebay.co.uk/BMW-E38-E39-X5...1%7C240%3A1318
Thanks for that, will give the spray a go and if that doesn't work I'll get in touch with the guy in Southampton.