The system is very accurate and has never steered me wrong. The only thing that I don't like about it is the display mounted off of the side of the center console (used a pro-fit mount). On the other hand the only other way to do aftermarket NAV is to replace the radio/MID with a full aftermarket system.

The other bonus of the VDO is that the computer is the same size as the BMW factory system. After a trip to the parts department and an outlay of $200 I have the nave computer mounted in the stock location... very cool...

I was also able to fully integrate it with the vehicle wiring harness so that the NAV instructions go over the stereo speakers.

If I ever get time and a digital camera I'll post pics and install instructions.

-Andrew

I need to know which is the best NAV system. I have a 97 540i w/o nav and would like to get one installed. I have heard mixed reviews about BMW's NAV that is not built into the dash. What about Alpine? ANy comments, suggestions would be appreciated.