i assume your cars an audi tt? lol
i dont actually own one but the ecu is under the bonnet at the back left of the bulk head just around where the windshield meets the bonnet under the plastic seal on that back ledge (just above the suspention turret). you have to remove the rubber seal running along the top of the bulk head. pull it back about a foot then lift the plastic cover. you will now see the ecu, pull it out!
pretty easy i think.
lift up the bonnet/hood.
there is a rubber seal running the length of the back of the engine bay. on the left hand side, peel this rubber seal backabout a foot. this enables a plastic seat to be made loose. this seat is between the bulk head and the windscreen (under the wiper blade. there is a box with a cable going ito it. I dont have a picture. if this still doesnt help look on google type in ecu location.
why do you want to know anyways? if your struggling to find it i wouldnt take it out without good reason or professional help.
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