140 Dash Cluster Flashing
I had this same problem on my 1992 300 SE. It is the motherboard. I was able to get it fixed with a 3 year warranty for $450.00 by ProgRama--they have a website and they are out of Boca Raton, Fl. Service was super fast--sent it out from Washington D.C. on Saturday afternoon by FEDEX and I had it back on my doorstep on Tuesday afternoon!
1967 230SL 5 speed