New car with AUTOMATIC for around 13,000 + disabled discount

Hello, my parents would like to buy a new car and are currently caring with the Skoda Fabia. I’m now trying to find some alternatives to Fabia that meet their requirements. One of the main requirements is the automatic circuit and the price that should be around 13k. I’ve already searched various sites but I haven’t found a list of which vehicles in this case would be in question, maybe someone here has an overview. The second point is the disability discount (SBG 50%). Here there is a 15% discount from Skoda. My question: how to proceed with price negotiations? First negotiate a normal discount and then talk about the disability discount, or put the cards on the table from the beginning? How many % can you realistically calculate summarum? Thanking for all the hints..