1998 Audi A6 6 cyl Front Wheel Drive Automatic 91500 miles
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I can not find the dipstick to check the tranmission fluid. where is it located and how could i measure the fluid

Hello,
There are several Audi, A6 to choose from so I am not sure which one is your. I gave you info for the Quattro Sedan. It may apply to your car. The other choices are, A6 Quattro Sedan, A6 Quattro Wagon, A6 Sedan, A6 Wagon.
On this model it appears to be on the driver’s side toward the back near the fire wall. Hope this help.