While getting the brakes replaced on I had them do a tranny and rear diff fluid flush with Redline Fluid. I know Audi says the fluid should last the life time of the car but that really is a risk I don't want to take. I always do a fluid flush every two years or 20,000 miles just to be safe. The cost of fluid is much cheaper then replacing part in the diff or tranny because of poor lubrication. That's just my opinion.
I started noticing that my subwoofers sounded like they were failing. I figured since my wife and I are expect our first child toward the end of October or early November that it might be a good time to change my setup. So my current setup was with a subwoofer box that took up about 40% of my trunk was not going to work all the future baby stuff. I stopped by CarToys since they were having the Memorial Day sale and picked up a Alpine Type-R Series SWR-1242D which came with a free box. Now I gain a good 20% back in trunk space.