Hi, I had a similar problem with my 2016 Mercedes E-Class, diesel, last year. It turned out that the fault was actually with the microphone, which is responsible for sat nav and audio system. It wasn't a simple replacement; they had to remove the whole audio and navigation system to look for the problem and replace the microphone. It was quite an extensive repair, although at first it seemed like it was just a minor problem. Nevertheless, once they were done, everything worked perfectly again. It was a bit annoying not having the car for a few days, but in the end it was worth it. Find a garage that has experience with Mercedes and that you trust. Hope this helps you a bit. Good luck!

(Translated from German)

Hey, thanks for the answer! Your experience sounds really annoying, but as long as everything works again, that's the most important thing. Can you remember how much you had to pay for it? And has everything been okay since then, or were there any problems after the repair?

(Translated from German)

Hey, no problem! Yes, you're right, the main thing is that everything is working again! As for the cost - it cost me €255 to get the faulty microphone fixed. Not exactly a bargain, but what won't you do for your darling, right? And no, I haven't had any more problems with the hands-free microphone since the workshop visit. Everything works perfectly and I'm super happy. Of course I hope it stays that way! Keep your fingers crossed that you get away just as well.

(Translated from German)

Thank you for all the information! 255.0€ sounds a lot, but if it helps, it's worth it. And as you say - what won't you do for your darling? Your positive experience after the repair gives me hope. Thanks again! I'll just keep my fingers crossed for myself too. At least now I know what I should be prepared for. Bye!

(Translated from German)