Volvo S40 Sat Nav update

The sat nav on my 3 year old Volvo s40 is a bit antiquated to say the least. No postcode input, no RTI and loads of errors in the database. Where can I get an update to the two DVD's.
Whats the best and cheapest route. Might even be better to scrap it and go Tom Tom 700?

Can anyone help point me in the best direction.

Thanks

[Charlie]

Welcome to our forums.
There has been a recent post regarding this (if you use the search function you may find it) in which it transpires that you will need to contact a Volvo dealer in order to aquire an update unles you decide on the TomTom solution which isn't a bad idea to be honest.