I have a 1985 300SD that usually runs very good. And all
of a sudden, wouldn't start. Like before a few times before, have
just changed the glow plugs and everything was great. This time
still don't start. I see where there is a glow plug relay.
Have never changed it. Also notice that the light on the dash
don't light like it used to, when turning the key on. Also
where is the glow plug relay??? In the electrical box or????
Also what part of the electrical box, as I don't have a manual.
Thanks in advance. And any other hints, if this isn't the problem..