My friend has text me tonight saying his fuel gauge suddenly stopped working on his 323i (E36) and wants me to have a look at it tomorrow, tbh I haven't a clue where to start looking apart from the fuses and the connection to the tank.
Has anyone else ever had this problem and can advise me where or what to look at?
Your help as always, very thankfully received.

The 100% American is 99% idiot.