Instrument panel lights won’t come on & car won’t start. Why?

What is your question?

Lights, windows, wipers all work. Key gets locked in ignition in position two. Can not get key at position one; can get key in position 2 to 3 but still won’t start. Advanced Auto store could not pick up any fault codes with their big OBDII scanner.

What makes this problem better or worse?

One sensor after another has been replaced; seems like the electrical is going out slowly

How long has your 2001 Mercedes-Benz ML320 had this problem?

couple of months