Mercedes has used the wrong led light bulb for the car lights. I'm sure that the Mercedes dealership will be able to solve this problem. Just get in touch with your local dealership. To be honest, I had a similar problem with some of the light bulbs in my house. They weren't working properly. I could only fix this problem by replacing them with a new set of the led strip light. Right now, everything works perfectly. So, mate, I'm sure your problem is solvable, you don't have to worry about it.