Car manufacturers (notably VW and BMW) where punished with 100s M Euro fines for enforcing that their Italian dealerships do not sell to Swiss customers, even though Switzerland is not part of the EU.
The situation is, of course, exactly the opposite in that Swiss customers profited from cheaper Italian prices.
The EU commission takes a very dim view on attempts to subvert the free market by manufacturers.
This seems exactly the opposite from the US, where big business is protected, but not the customer.