Hi. I'm brand new here having googled my way to the experts it seems.

I have a 2002 735 with a (I assume) Carin system. It certainly uses CDs. It had a variety of software updates over the first years while BMW were servicing the vehicle but I've done nothing to it. The navigation facilities now seem a bit dated and the map update costs outrageous for TMC maps, in fact I was going to get a Tomtom for the POIs, 3d mapping etc and relegate the built-in map to an overview role.

It now seems that I can increase the capabilities of the built-in system but my query is really - what should I do?

TIA