We have a 2006 Mercedes S430 with Navigation. We had a heating problem and the dealer said we had a faulty chip that was replaced under warranty. However, something affected our GPS. Now all of our saved locations are saved by county, not city. As you can guess, there are many cities in our county and we prefer our addresses to list the city, not county. However, when we brought the car back and asked the dealer to change it back, he said that it was never that way. He says addresses are always saved by county. We have been using this car for a while and we know that they were saved by city. Can anyone help?

Thanks.