Welcome Drew!
I bought my 230 at the end of the year last year so I'm still getting used to it. The folks on this site are fantastic and have the answers to most any problem. As for your dash, I feel your pain. I ran the ground wire to the battery to no avail. Actually, the previous owner had Rapair do the soldering, they just didn't take it directly to the battery when it was reinstalled. I've gotten so fed up with it, I decided to get the new individual gauge panel. ($506 + tax and shipping). I posted a pic of it in this link.
viewtopic.php?f=3&t=2784&hilit=025+3119+01+dashI have seen somewhere on this site a picture of your VDO cluster open on the back and it showed where the ground wire was soldered. Just not sure which thead.
This may help as well. Copy of the CDI Manual
http://cdielectronics.com/LinkClick.asp ... uage=en-USAs for pics. I upload to Photobucket.com and then copy the URL directly to my post.
Hope this helps. Looking foward to seeing pics.