Those little things that still puzzle me after having the car for a couple of months. . . I never did figure out what that thing was that I found stuffed behind the passenger seat. Re: What is this thing?? I think the interior light in my Roadster is installed backward. When I tilt it forward, it shuts off. When I tilt it back, it lights up -- nicely illuminating the rear window, but the rest of the cabin not so well. Based on common sense plus my reading of the owner's manual, this seems to be opposite of how it's supposed to work. I asked the guys at the service center, but they assured me that "the way it works is counter-intuitive". They also claimed they checked another Roadster, and it worked the same as mine. So is it the manual (and common sense) that's wrong here? Why does the rear compartment -- outside of the gasket-sealed trunk space -- collect so much dust? Sheesh! Even short drives on seemingly non-dusty paved roads put a layer of dust on the PEM, ESS and the top sides of the wheel wells. Driving over a dirt road really poured it on. By comparison, the front of the car, under the hood, doesn't collect dust at all. Is the battery cooling system really supposed to be this noisy? The intensity varies, but over the last few days it's had a few episodes of really buzzing. Today somebody was asking me about the car. . . "Does it have a four-cylinder backup generator?" "No, it's all electric." "Then what's that sound coming from the back?"