Working on replacement of heater hoses and noticed some slime under these boxes? It is all dried up but I wonder if the electronics were fried at some point? Guess I find out when I attempt a start at some point...
Just replace that thing. Had the same slimy stuff coming out of my Ignition Box in my '79 RV (MB400). Then shortly after - it just failed on me. Luckily not in heavy traffic on a small road....