I have an '84 500 SEL and for a few weeks it would stall once in a while
when taking off from a light.  Thought it was the fuel filter so when it
just stopped working we replaced.  Didn't work, had to tow car home.
Everything works, light, horn, windows, radio the starter turns over but
the coil and ignition don't get spark.  paid a mechanic to look at it and
he said it needed an ignition control module (not cheap!) it didn't do a
thing.  Any suggestions?  We would rather not do the hit and miss method
as it can be very expensive and every part takes at least 3-5 days to get
to us through  UPS.