It simply means there is something wrong with your Mercedes' Pre-Safe system.
What is the Pre-Safe system, you asked?
Well, for starters, it is one of your Mercedes' safety mechanisms.
Pre-Safe prepares passengers for an inevitable collision before it even happens.
Well, it employs a network of radar sensors and cameras to know whether an accident is inevitable or not.
Its failure will prompt the onboard diagnostic system to show a "Pre Safe Inoperative" message on the dash of your Mercedes.
The Pre-Safe is a very advanced safety mechanism.
It employs thousands of parts to function.
If any of these components stop working, the Pre-Safe will malfunction.
As a result of which, the "Pre Safe Inoperative" message will come on as a warning.
Yep… the Pre-Safe of your Mercedes will not function, if the weather outside is harsh.
It may prompt the onboard diagnostic system to show a "Pre Safe Inoperative" message on the dash.
Whatever the reason may be, if the "Pre Safe Inoperative" message appears on the dash of your Mercedes- don't take it lightly.
Call a car mechanic and consult with him about the message.
