AJAX Custom Taxonomy filter in Wordpress

I want a plugin for a car dealer theme to filter custom taxonomies with AJAX live. I need a custom post named "Cars" with 5 custom categories: Brand (I don't need Model),Fuel, Price, KM and Year in this order. I want to make a filter based on that 5 custom taxonomies. I give you a example. Let's say I have 3 cars: Opel that cost 12.000$, diesel, 110.000KM from 2007, Honda that cost 15.000$, gasoline, 250.000KM from 2000, Toyota that cost 6.000$, gasoline, 180.000KM from 2003. From the filter if I select Opel as a Brand, next taxonomies to be live actualized in association with the brand selected, in this case at fuel to see only diesel, at Price to see only the range where is included the price of all Opel cars, in this case only 1 price and the KM and Year the same like Price. With other words, I don't want to get negative search results with any combination on filter. Taxonomy filter in this way: Brand as dropdown. Fuel as dropdown. Price with 2 dropdowns: first dropdown that shows the minimum price and the last dropdown that shows the maximum price. If I select as Brand Opel and I have only 1 car then first and second dropdown will be the same, the price of the car. KM and Year will be the same as Price. Remember that I want the dropdowns to be with AJAX to not refresh the page. Page will show the results of filter after I press a button. I want friendly permalinks.