mercedes intermittent dash light problem
 

Hi all, I have been having intermittent problems with dash lights and gauges on my 84 mercedes 300d.turn signal indicators and high beam lights stay on and electrical gauges spike when turn signals are used, or sometimes just driving down the road. can anybody give me some suggestions where to start?? was told it's possible I have a bad voltage regulator. new to mercedes so I'm pretty much flying blind!!!!