[msej449]

In terms of patent, trademark and intellectual property law, my non-legal understanding is that if the item is sold for profit without license from BMW, then it breaks the law in the UK and EU. The case would be strengthened further if the BMW logo enhanced the value of the item or made it more desirable to a buyer. And strengthened again if BMW themselves sold products of a similar type, even if their main business wasn't in the sale of that product i.e. clocks.

Whether BMW would bother to take action is not something that anyone but BMW can predict.

So one route is possibly to write to BMW's legal department outlining your item and explaining your intent and see what they say. The thinking being that you can't be any worse off if they state their position up-front, versus their contacting you after something appears on eBay or similar.

As ever, all this is without liability. I'm not a lawyer.

BTW, I love the design and think it's a really original idea.