I guess a big part of this conundrum, is how you will intend to sell your used vehicle. The problem can be with extras is the valuation process does not really allow for them, and there is alot of extra combinations with a T6; If however you sell privately and do a good job bigging up your van and really sell the benefits to the new owner of your extras, then you may recover alot more cash.
So I guess the highline spec may offer higher residual values, because it may fit more easily into a valuation models/tools.
The extras people can easily add themselves, and offer personalisation routes such as wheels, suspension, leather, windows, cab heater, ICE(especially as ICE moves on quickly every year and is soon out of date) may not add much residual value to the vehicle.
The extras that cannot be retrofitted DSG, 4 motion may offer loads of extra value, but you will use more fuel with 4mo.
Aircon, electric heated mirrors, electric windows etc are no brainers.
My personal favourites are heated captions chairs *2, with arm rests
Then there are the feel good about the van extras such as LED's, which everybody enjoys (imo
)
And of course the colour, I guess Greys and Blues will always find an easier second home, than more exotic choices, but if you have a really nice rearer colour well specked; yours maybe the only van in the country to come on the market at that time and really float somebodies boat; even better it it floats many peoples boats, and you get a bidding war.
I would be surprised if any extra can retain 100%+ of its new cost and suffer no depreciation at all; maybe 4motion gets close to that??????? Don't know what others think about this?????
My personal route to maximum value it to spec it exactly to my choice, and then hang onto it for many many years, but I did speck up alot of options.
