Audi has it's own ATF, and the year model will dictate which fluid you must purchase from the dealer (for around $20.00 per Qt)
You need to do an in-depth diagnosis of the problem to determine the cause, and repair it.
The right types of fluids have to be in the car to keep it running smoothly. A 2003 Audi A6 Quattro 3.0 uses 5W-40 engine oil.
my 02 A6 3.0 Quattro holds 6.5 quarts and I only run synthetic in it
About 5.25 with filter.
4.5 quarts
Were is the plug to put transmission oil for 1999 a6 audi?
5w30- check owner's manual. I run synthetic in my A4 2.8.
Underneath the engine, toward the right.
Use Exactly what Audi recommends as written in your owners manual. You listed no year so I would only be guessing.
For a 2005 Audi A6 3.2 Quattro, it is recommended to use synthetic oil with a viscosity of 5W-40 that meets the VW 502.00 or 503.00 specifications. High-quality synthetic oils provide better protection and performance, especially in varying temperatures. Always check the owner's manual for any specific recommendations or requirements.
19mm socket for the oil drain plug and a oil filter wrench if your not manly like me