Quote:
Originally Posted by IT
The only upgrade that cannot be done without removing the dashboard is a heated front screen.... 
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Retrofitting heated windscreen with dash in place is no problem at all.
Heated windscreen comes with 4 wires. Two from top of the winscreen and two from bottom corners. Top two are connected to wires with +42v from transformer in the boot. Connecting them is easy since two top wires go directly into headlamp area.
There are two bottom wires in each corner. They go to ground connection of transformer in the boot.
Connecting them is even easier than top wires since when a-pillar trims are out there is a good niche there to arrange a connection. There is about square inch hole connecting that niche with footwell areas on right and left.
I think biggest challenge in windscreen retrofit is snaking wires to boot as this is rear seats out job.