I have an electrical problem that I need a little guidance on solving.
This in an '87 300SDL.
When the headlamps are turned on the bulb out lamp illuminates on the
dash. I suspect a loose connexion rather than a bulb being out since
repeated walking-arounds show no lights being out. The guy that I
purchased the sedan from had replaced the original head lamp assemblies
with "Euro-style" units which is why I'm suspicious of a loose
Last week, I was making a left hand turn with the turn signal engaged,
headlamps on. The turn lamps both fore and aft now come on, but do not
flash when the switch is engaged. This occurs only when the headlamps
are operating or the parking lamps are selected. When the headlamps are
not on, the turn signals operate normally.
So, the question is should I look at the relays for the headlamps or
consider replacing the headlamp switch? After twenty years, I think
that the switch may be a candidate for replacement.
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