Nto sure if your car has one, but search for OVP, and read the posts. yours sounds like it could be related to this inexpensive part, which is notorious for similar symptoms and many others.
I would also have the codes read, it could be showing a fault code for something specific.
Good luck on your search.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.