This is where the car dealer sells you a finance package for the car but does not tell you that they are getting a commission, or how large the commission they are getting is. Most customers expect the salesperson or dealership to make money on the sale of the car, but they do not realise that they may also be getting a commission from the finance company for the PCP finance agreement that goes with it, meaning that the customer is potentially paying more for the Mercedes than they should.
Because of the high risk of there being a conflict of interest between the customer and the car dealer (the dealer recommending finance products based on the amount of commission as opposed to what is best for their customer), and to ensure full transparency for their protection, the exact amount of this commission should be disclosed to the customer.
If the payment of commission and the amount of that commission has not been explained, then the customer can claim compensation for mis-sold PCP car finance.