The Noise
The SDL developed a noise that drove me absolutely bonkers for months. The sound? Like sporadic heavy drops of rain on car sheet metal. I always felt the sound was coming from the driver side near the firewall of the car. It only happened at highway speeds of +50 mph – but not all the time. It would be hard to guess how much time was spent on trying to locate this.
The conclusion?
When the car would be moving into a head wind and traveling +50mph. A small strip of the windshield gasket looking like a rubber band would extend out from the windshield frame and slap against the roof metal. When you stopped it would neatly retract back. The sound developed once while the other half was driving. On a lark I opened the sunroof and stuck my head out while proceeding down the highway. Problem solved shortly after stopping with pocket knife.