Thanks to Nathan @ Babbitt Motor Werks in Mesa, AZ my NAV system has finally been diagnosed. It is my screen as suspected. Both my MK2 and MK4 worked in my X5 with a spare 4:3 screen he had laying around, we also tried the units in a 740 and they worked there as well. I would certainly reccomend this shop to others in the Phoenix/Mesa/Tempe/Scottsdale area.

Shipping my unit to Alpine in NJ with a check for $150 in the morning.

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Indy Shops:

Berkeley:
German Auto Sport

Phoenix:
Babbitt Motor Werks | Arizona Bimmer Motor Works

Reno:
Reno Rennsport

Rides:
00 BMW X5 4.4
93 Nissan 300ZXTT
88 Nissan 300ZXT Shiro #853
88 Nissan 300ZXT Shiro #773
84 Nissan 300ZXT 50th AE
78 Datsun 280Z Black Pearl
15 Yamaha WR250R
06 Yamaha R1 AE

Email:
WE350Z at gmail