This week, you’ll swear one of our callers is the Prince of Polka himself! Jennifer’s losing her faith in the benefits of a Benz, and Ray unveils a brilliant little theory about the Mercedes parts pricing conspiracy. And here’s another one from the Car Talk Product Patent Office: cat repellent for car roofs! Plus, a random sample from our weird letter office. All that, other daring callers, and maybe a little something from the bubble machine, in this week's Car Talk.