Hi there! I'm new to this forum I had a 2004 SLK 230 and have recently bought a used 2012 SLK 250. I'm happy to meet you all. Hope everyone has had a great holiday season. F) I currently am experiencing a problem with the Comand navi system. The previous owner says they have no idea what happened. Everytime I press the navi button I get "Navi drive unavailable". Called dealer, they confirmed that the car does come with factory installed navi but previous owner claims it was working before they sold it :crying: So I'm trying to see if there is anything I can do before having to bring it into the dealers and paying for a diagnostic test that may not even fix the problem (ex. if the previous owner disabled or removed the drive). Thanks ahead of times.