I agree with brian5, the heads-up display significantly increases the usefulness of the NAV system. My 07' X5 3.0 does announce the street name when it states, turn left in 1000 feet onto...street.

__________________
2007 BMW X5 3.0- loaded with every option!
2006 911 C2S Cab- loaded with techart touches
2006 MB CLK500 Cab- wife's car
1986 944 TURBO- track car