Mk3 TDi random fuel gauge?

Recently the fuel gauge on my Mk3 TDi has started to randomly display what may, or may not, be in the tank. Sometimes a 3/4 tank will be empty and then as l am driving along it returns to normal and also when l start the vehicle the diesel fairy seems to have added a 1/4 tank worth which will then disappear after 5-10 miles. For the past couple of days l have done 200 miles on an empty tank even though l know there is over 1/2 a tank in there!!

Any assistance with this would be greatly appreciated as l know one day soon l am going to lose track of whats in there and end up sheeply standing on the motorway awaiting the orange flashing lights to rescue me.

I found this as i have a failing tempeture gauge on my AUDI, this link deatils the mk3 DASH.

http://www.bba-reman.com/content.asp...luster_failing

They may help you diagnose it before you resort to a serviced unit, I haven't used them but it could be usefull to speak to them.

Rob :D