Why does my turn signals stop working while im driving

What is your question?

While driving my 2013 Mercedes ML350 my turn signals work while driving as I'm driving they stop working I have to stop put car in park turn off the car and turn it back on like I'm rebooting the system they work again only to turn off and not work again what is the problem and how much to get fixed?

What makes this problem better or worse?

Better turn car off and on it works worse it stops working again

How long has your 2013 Mercedes-Benz ML350 had this problem?

A couple of weeks after we got the car