BMW 325 Instrument Cluster Gauges Tachometer

I Noticed A Couple Of Weeks Ago That When The Car Is Idling And I Role Down All Four Windows At The Same Time The Tachometer Dropped. Also...

Computer Problem 1993 Bmw 325 6 Cyl Two Wheel Drive Automatic 116xxx Miles Hey, My Bmw Has A Tachometer That Will Not Register...

My Tachometer Doesnt Work, And I Have Already Checked All The Fuses And They Are Still Working. What Do I Do Next?

Thanks For Your Expert Advice On All The Topics. My Concern Is The Speedo Meter On The Intrument Panels. Evrything On The Panel Works Fine...