I am changing the transmition fluid and wander where is the refill plug located?
Please help

 

Pull the Tiptronic Trans pan to drain oil and change the gasket & filter while in there. Follow factory torque spec when re-installing pan. What looks like the drain plug on the bottom is actually the fill plug, you'll need a fluid pump and a "hooked hose" to fill from underneath. You can use VAG-COM or equiv to set the fluid level when warm as you'd like to read the temp of the fluid. This process will replace about half the fluid in the Trans and TC system.