AudiForums.com - (Right) Turn signal funk

I left my 2005 A4 3.0 Tip with a dealer who "tried" to sell it for me for several months.
Last Saturday I went to pick it up and found that the battery was flat dead! $152.00 later the car started but I also found that my passenger HID low beam was dead. The coolant reservoir was empty, and the tires seriously deflated. I bought a replacement DS1 for $60.00 on eBay, refilled the expansion tank with the proper fluids and everything is fine... or so I thought!
When I use the left turn signal, all is fine.
When I try to use the right turn signal I get the first flashing on the right alright, but then it switches to the left and keep flashing on the left by itself. Yes, using the right turn signal will make the left flashers go! WTH???
I was wondering if there is a pending technical bulletin for this.
The car just turned 27k miles and is otherwise in perfect condition.
I am narrowing the issue down to 2 potential suspects: the flasher relay, and the turn signal control switch (Combo headlight and turn signal).
Anyone ever experienced this?
The car sat for 5 months in Newport Beach and there was a lot of moisture accumulated in the headlights. I am wondering if the excess moisture could also have had an effect on the aforementioned components (switch and/or relay)