Whats the issue. Never had an issue with mine and use it a decent anount as mine is a DD.
Two issues:
1. The Mercedes and the Porsche GPSs are at least two or three years behind on data. For example, Charlotte has several new sections of beltway. Those sections are several years old but they are not on either of my car's GPSs. So I use my iPhone to guide me.

Come on Mercedes/Porsche, make it easy to update your information.
2. The Mercedes and the Porsche GPSs are not intuitive. It is a pain in the a$$ to enter a destination. (Yes, I know how to use a GPS. I have been using a GPS since they were first made available to the public. My first GPS sent you to a
coordinate and directed you there with an
arrow. :crazy: There was no street-by-street guidance.)
Like I said above . . . That was just my rant for the day.
(By the way, I stopped using a GPS on my motorcycles. I found that I have a more enjoyable ride without a GPS. If I get lost I look at my phone.

)