Which of the following is not allowed in a dealer's advertisement?

In the context of dealer advertisements, the specific practice of offering to match down payments is not allowed because it can mislead consumers about the actual terms of the financing and may create an impression of incentives that are not lawful or standard industry practices. This type of promotion can lead to confusion regarding financing options and may not comply with fair advertising regulations, particularly in accurately representing the dealership's terms and conditions.

On the other hand, offers related to trade-in bonuses, vehicle financing, and discounts on maintenance are generally permissible as they can be presented transparently and comply with advertising laws as long as they adhere to truthful advertising practices. These types of promotions can provide customers with legitimate incentives and clearer information about the dealership's offerings without creating a potentially misleading or deceptive situation. Therefore, the prohibition of matching down payments is rooted in the need to ensure clarity and fairness in advertising practices.