Electrical system. And why do you think it can't be connections since it does it on both clusters? If the connector plugs are bad, that's exactly how it would react, showing the same symptoms on both clusters.
Quotes to live by:
guessing gets expensive
nothing is more expensive than a cheap BMW
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito)
Ken Kanne, Silverhill, AL, E36 & New Member Intro Forum Mod/Bimmerfest Tow Truck
1995 318is "Bebe"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette"