bug892

I have a 2002 190ls with tach problems. I'm trying to get the gauge out, but it's been difficult as I can't see the back of the gauges due to fiber glass panel underneath. Can someone tell me how to remove the entire dash from the front so I can easily get to the gauges? Also, the tach is stuck on 800 rpm. Digital hour meter on the gauge is working fine. Any thought?

I'm looking for a manual. Can someone post a link?