Great thread and loving the Mojave silver saw one in the flesh at Caffeine & Machine a few weeks back and it looked stunning.Reinstalled my Blackvue DR490L 2-channel dashcam from the W176 A200 into the missile today. Took a little while to sort out suitable ignition and permanent live supplies, plus ensure the piggy back fuse connectors were a good fit in unused slots; 125 for ignition and 162 for permanent.
Minor details with trim and seals are a bit trickier in the W177 than the W176, but other than that the routing is very similar, all the way to the rear screen.
At some point when I've collated all the photos, I'm not out in the missile, or wiring the house, or gardening, or at work, it's arse weather and there's no pixels to kill, no premium TV to watch (all you GoT addicts) and other sundry excuses, I might eventually post a guide.
Cheers for the dashcam install pics I'm just doing this myself. One thing I've picked up though is you've routed cables over the curtain airbag rather than behind them - hopefully they'll never deploy and it'll never be an issue but for the sake of 10 mins it may be worth a look.