Tried to get nav updated today at dealer, informed nav was up to date. Waiting for MB to notify me that there is an update for my vehicle, free for first 3 years, likely futile. Anyone know how to find out when updates are available? MBUSA tells me it's a dealer thing, service and parts dept. Told by parts man that new update available but this dealership had not purchased yet!??? Is this how its supposed to work ? My service rep and MBUSA customer svc rep "investigating"! Have heard nothing all day. Only have two weeks left before free update expires.