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Message: <blockquote data-quote="ehoe" data-source="post: 10354" data-attributes="member: 141"><p>My E34 M20 (1989) instrument cluster was having erratic functioning of the gauges recently. The fuel and temperature gauges would swing all the way to the right side (i.e max fuel & temp) then it will return to normal. This happens intermittently only. So came across this link on a possible cause : <a href="http://www.bmwe34.net/e34main/maintenance/electrical/capacitors.htm" target="_blank">http://www.bmwe34.net/e34main/maintenance/electrical/capacitors.htm</a> So I dismantled my cluster looking for the capacitors which is the prime suspect stated in the link above that could cause this erratic functions and my cluster is totally different from the picture of the cluster in the link. I don't even have such capacitors on my board. I do however have two large rechargeable batteries on my board.  Just wondering anyone know what else could cause erratic functioning of my cluster on my model of cluster?. Has the rechargeable batteries got anything to do with it? What is the function of the batteries in the first place?. Also what is that black little object I pulled out from the back of the cluster? (I highlighted it in a red circle).  Any ideas sifu's?. Appreciate the help/advice. Thanks</p></blockquote><p></p>