Engine Control Unit (ECU) location? on 1999 Audi A6 Quattro

Where is the Engine Control Unit (ECU) located in a 1999 Audi A6 Quattro?

Asked by for the 1999 Audi A6 Quattro
Engine ECU is just under windscreen in the engine compartment on the passenger side.
1 more answer
I believe it is still under the carpet and cover under the passenger side front seat.