I've got an 1999 UK model E38 735 which has an occasional fault on it's Mk2
satnav. I've deduced it's probably losing the calibration on the Gyro so
I've got a replacement second hand unit which I'm about to install.
My question is this, can I just swap the units and expect it to work?
What I'm concerned about is
1) should I disconnect the battery first
2) Will the break in power when the units are swapped over mean that the
software will need to be re-loaded or the car re-coded as I only have the
map CD and not the operating software CD
I'm a bit nervous about proceeding as an intermittent Sat Nav is better than
no Sat Nav and taking it to BMW could be very expensive as they've quoted
almost £1500 for a new Nav computer alone with labour on top.