Help! Help! Help!

Hello your many V8 ler!!!
Woman driving, it's gonna be expensive!!
I'm starting to believe it. No one can help me with the problem with my V8.
So, therefore my cry to help you all!!!!!
I have a 3.6 he, BJ 11.89, version D11 and the spins!!!!
Every time I drive a couple of kilometers and turn off the car, he has a
Temperature of 70-90 degrees, come back and want to continue driving again, he spins
No more. They told me it had something to do with the warmth sensor (or so)
to do? He did it only in the summer at higher outside temperatures. But
now he does it in autumn (soon winter). Because it's not so great always just
parking with open bonnet so that it gets cold faster.
In an Audi workshop, they wanted him with this computer and a fault search system
But it doesn't work because this cable supposedly has a cable break to the computer.
All these people help me with your highly esteemed advice!
If you live in the district of Würzburg, maybe someone's willing to fix my V8,
of course against payment!!!
Best regards Petra