Every 3 months Dacia agrees prices with Motability and offer a price guarantee. That means when you order your car you secure the current price, even if the price changes before you collect your new car. Some cars are available for no more than the cost of your allowance, however, to widen your choice of cars, you can pay what is called an Advance Payment. Advance payments are non-refundable and made to your dealer at the start of your lease. An Advance Payment is simply the difference between your higher rate mobility allowance and the overall cost of your chosen car over its 3 year lease.