[arnebret]

Little update: i took the instrument cluster out, and cleaned all the contact points etc. I then sprayed them with a little 2-26 Electro to keep the dirt off. I only reconnected the three plugs and already noticed the fuel gauge is giving me a higher reading then before. Tomorrow, i'll get me some new bulbs and replace them all. It's not a hard job and actually worth to clean once every 4-5 years or something.