navi showing incorrect position
 

I just installed an MK4 navi drive in my 02 M3. Everything works well and it navigates and all that. The only problem is that the position it plots me on the map is off. For example, if I completely cross an intersection and look at the map, it will show me as coming up to the intersection. This can be very confusing when streets are very close together. It's approximately 100 feet west southwest of where i should be. When I drive down my block, the map will show me driving in between the two streets instead of on my street.

anyone had this problem or have any ideas?

If the nav came from another vehicle, then it needs to adapt itself to your car. To do that, go for a drive on the autobahn / motorway for at least 15min, driving at around 60mph / 100kmph. After a few minutes the nav will be calibrated to your wheel size (it adjusts the calibration valus to match your vehicle speed to GPS calculated vehicle speed).

thanks for the info. however i have already been driving around the entire day yesterday, both on streets and on the highway, i dunno if i went at least 60 for 15 mins straight, but it was definitely alot of driving. you think i need more time for it to adjust or could the unit be faulty? i was gonna put my old unit back in to see if it goes back to normal.

Go into the hidden 'service' menu and check that the Wheel Sensor field is changing with speed - if not (it shows 0 or is static when you are driving) then it is probably a faulty (incorrectly pinned) loom. I had this on my E46.

See http://www.xoutpost.com/articles/all-...formation.html for some info

this seems to be only for people who retrofitted the navi. mine was stock and my mk3 nav worked perfectly. but i will check out if the wheel speed sensor changes or not.

Hey have you tried to input directions just to see what it will do??

yea i have. and i did it while i was downtown manhattan where the streets are criss crossed and really close together, it really messed me up. it blatantly put me on the strong street. i had to look at the map and figure it out on my own.

It was down to a set of faulty wiring looms - some went to factory fit, some went to retrofit. It seems that people who retrofitted noticed the problem. My E46 had this exact issue and it took about 6 visits to the dealer to resolve, and only because I found the info about the wheel sensor wire did it get fixed.

But it may be something totally different in your case, however unlike the early Mk's of navi computer, the Mk4 has no dealer calibrations - it takes all the data from the GPS and the inertial sensors in the car (gyro, speed and direction etc) to calibrate

Can you go into the navigation service menu and tell us what all of the GPS status information is showing. Maybe we can figure out something from that data.

i attached the images here. some of them are blurry but you can make out what it says. in the first picture you can see the gps plotted me on top of someone's house (in between streets).