I change the oil in the springtime and store the car indoors during the winter months. Whatever my Super Beetle needs, it gets. I wash and wax it a lot and use all the proper products for the job. I would recommend Protectorant 303 for your interior and tires. Unlike the other shiny products this does more than just clean, it screens out UV rays and stops plastic from cracking. I recently gave the car a waxing using Zymöl Automotive Enhancement Products. You can read all about it in the Review section of the site.