Earlier quoted context omitted.
Mazda earns several hundred to several thousand dollars of profit from the sale of a car to you. Google earns an order of magnitude or two less per user.
Thousands of dollars are only possible with luxury cars. VW, one of the two largest auto makers, makes around 300€ profit per vehicle sale (excluding luxury brands). For some models it's even less than 100€. You can calculate around 1% profit for a car sale, often less. The actual money is in leasing and financing, which is why almost all automakers own a bank.
Seeing as it's absolutely trivial to negotiate 10% discount on any new VW car, I struggle to see how that's true? Unless you mean that VW makes 300 euro and the rest is the profit of the dealership?
Even if that's true, VW makes an absolute mountain of money through financial services. Yes, they will make very little profit selling you a £12k Polo, but VW Financial Services will make £2-3k just providing you with a financial agreement for it.