I had the same in February last year at CW. It was nothing to do with the colour, they wanted another full set of paperwork for reasons they didn't explain. They probably mentioned B/W because it's cheaper.
This month they didn't ask for it.
I found one before on ebay for around 1500 baht versus the 12k the dealers wanted. This was a couple of years ago. It worked and had free updates for a year, but the prices to update after that were pretty high so I switched to Android Auto.