Finally got my upgrade today:
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So I set up a comfy chair to enjoy the show
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First connected their laptop to my car and backed up my profile, then unhooked the 12v battery under the hood and the 400v battery under the back seat. Then removed the glovebox and knee airbag and the interior panels needed to get those out. In the frunk, he unhooked the coolant lines and bent them up so they didn't drip. He let me slip in and spray coil cleaner on the AC to stop the stink when the AC first turns on, even pulled my filters for me. Nice guy. With the old computer out he let me check them both out. The new one doesn't have the two ethernet ports, but it does have HDMI. I think that's USB C I see there too, not micro USB. He had to modify the wiring harness since I have an older TM3. Then he aligned the four bolts and pushed the new one thru the firewall and ran around and bolted it down and re-attached the coolant lines. Then just attached the wires to the new box and put the dash back together. On the laptop again he ran the coolant purge and restored my profile.
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Already had the new maps and 2020.20.12, everything transferred to the new computer, just needed to reattach my iPhone and my WiFi