Do you hear the starter turning? if the rotor is not turning and there is no spark, but you hear cranking, then I would guess that the timing chain broke, and if that happens, it is quite a job to get it fixed. However from what I know, when the chain breaks, it is quite catastrophic and your descrition of the incident sounds more like a failure of the fuel pump, but you did mention a buzzing noise, which to me suggests the fuel pump works.
Take off the valve cover and you will know for sure if the chain is the problem, also see if you can give us any other details about what happens with the car now.
If I remember correctly 91 190s have a duel link timing chain, which is much stronger and should last a lot longer, can you tell us how long ago the chain was replaced? If ever?
1985 190E 2.3L - a constant project.