Early signs of a failing NSS switch or worn linkage bushing.
Fix it before it leaves you stranded , b/c it will... sooner/later.
...and Murphy says it will most likely fail when you stopped on the side of the road for a quick pit stop at midnight , in the woods on a full moon, a few miles down the road from that prison where those two armed and dangerous death row prisoners just escaped and stole a Benz just like yours...
.. Have no fear though, ..you can just explain the NSS situation to the cops when they surround your car, as it is common for the switching contacts to simply wear out from age/use........

Don't do as most .... they change it when it finally goes..

PS... Same goes for Ignition sw. When you have to play around for the trick to turn the key, get it fixed b/c it is one day going to strand you... specially for those foolish enough to have 10 lbs of keys and crap on their key ring.........dumb !