One problem related to turn signal has been reported for the 2013 Mercedes Benz ML350. The most recently reported issues are listed below.
The left and right turn signal failed while driving on highway. It was a pre-owned car which I purchased from myrtle beach automotive on July 28, 2018. However, the left and right signal malfunction occurred next day July 29, 30, 31 and Aug 1 when I was driving on highways. On Aug 2, the car was inspected and software upgraded at the dealer and was driven home this same day. Aug 3, the car ran well and the following two days it was parked in lot. Aug 6. The left and right signal malfunction appeared again. I am now contacting the dealer again for a solution. It is really a dangerous and disturbing safety issue.