I'm having trouble with the service indicator on my 1997 328iC. Under normal operation when you start the car, the service indicator comes on, then times out. What I'm seeing 95% of the time is the SI tries to come on (looks like a dim backlight for the whole LCD) at this time half of my odometer digits (or bars) are out. Once the SI times out, the odometer returns to normal operation.
I've done some reading about lamps being burnt out, so I replaced the 2 lamps for the LCD on the back of the cluster. I also tested all other lamps. This did not help.
I've also read about SI batteries but was only able to find information on E30 SI batteries.
Anyone have any ideas?