The gauges in my '96 328is have some strange problems. Temp and tach are dead. Gas says the car has the same amount of gas in it as it did when this problem started. The speedometer works most of the time, but occasionally it will go up to 70 or 80 when I am manuevering the car around in parking lots at low speeds. Almost like it is trying to do the tach's job. The car did this about a year and a half ago, then it fixed itself. The problem is now back, and I would rather not wait again. Any help would be appreciated. Thanks.