-Yep, thats right, I'm a girl-
Its a wolfsburg thing, you wouldn't understand.
The 09a filler cap is located on the black metal solenoid cover on the front side of the transmission. Look near the mess of hoses and wires near the battery. It might have a red pastic band on it and is about the size of a soda bottle cap. Gently pry on the very outer edge of the cap to avoid bending the metal shoulder that it wraps around. My long neck funnel needed to be slightly modified by melting/bending the tip to get the fluid in.