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Originally Posted by Demon31
I will check the gyro tonight. but does it really need all that? i have a bluetooth gps receiver hooked up to a PDA and it works perfectly fine. even aquires a signal faster. doesn't need a gyro or any wheel speed sensor. it just picks up a signal and knows where you are by that.
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Your PDA is just a GPS receiver
The BMW nav is an inertial guidance system with GPS position verification - quite different!
Your PDA won't work in tunnels, in parking garages, etc.
The BMW nav will.