Thanks guys, some useful info there, I'm using an iPhone so it would be handy if I could get something that's compatible with it. If I'm out on the road and need to tweak a route that would be great but not essential as I will have planned an exact route before I leave. I'll be preparing around Christmas time for a sat nav so I'll make sure I get something that suits my needs. Sounds like either the farming or tomtom should suffice. Shorty: I don't believe there is a specific socket on my bmw although I could be wrong, all I have linked to it is a 12v fitting at present.