Yeah, ignore the above and don't download and self-install! If you are talking breadcrumbs you have nav and if you have nav you are going to need a new nav card (A4). Contact your dealer and tell them you need it because your breadcrumbs are not working. Demonstrate that fact to them if you have to. If you download and self-install they (your dealer) may not honor the TSB and you are stuck paying for the card (or having no nav). Just letting you know it seems to work now w/3.5.1.
.......here's a lockpick. It might come in handy if you, the master of unlocking, take it with you.