Have Mercedes Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.Mercedes has released a service bulletin that deals with the type of problem it sounds like you are having. I have enclosed the bulletin in the link below. Copy and paste the link to your browser to open and view it.https://dl.dropboxusercontent.com/u/104923897/Mer%20Nav%20Jan%2024.pdf
Have you tried the suggestion in the link?
If you have not done this before you are best served to have it professionally done.