Currently I am considering getting a 'Mini' brand folding bike mail order, even though I have not seen one in a shop or in the street. This I am happy to do as it is a re-badged Dahon at a special price.
Being a niche product I can understand why bike racks are not filled up with 'Mini' folders, however, I don't know why it is that all other bikes by auto manufacturers seem to completely fail in the marketplace.
Peugeot did really well until mountain bikes came along so it is possible for an auto manufacturer to succeed at bikes. Other than the past efforts of Peugeot the only real-world evidence in the UK of the efforts of the auto manufacturers are a few bicycle-shaped-objects from mail order catalogues with tacky 'Land Rover' decals on them.
I would not mind a Mercedes road bike and a BMW mountain bike just so I could have running jokes, e.g. casually mentioning that 'I came in to the office with the beamer today', 'I parked my Mercedes in the car-park', etc. For joke-reasons alone I would have thought bikes-by-auto-companies would have enough kudos to sell. But they don't. Why is that? Do they sell well outside the UK?
In case you have not seen any bikes-by-auto-manufacturers, here is a small selection of them.