I have this s420, 1995 I am working on. It is plagued with an intermittent no start problem, she cranks very well, but sometimes cranking, but no start.
There is fuel pressure, but no fuel, and no ignition.
no codes either. sometimes this car will start and run for weeks especially if used every day. let her sit for a few days, problems begin.
a different key does not resolve this problem.