Audi Suspension Rear Axle Spindle

i have a 2002 audi a4 quattro 1.8t i bought the car 4 months ago and out of 25 years of my driving cars,trucks,vans i have never experienced such a sad waste of time in engineering this car is worse than the mercedes e500 wich was another garbage

audi year2000,2600cc gasoline leak from ventilation under front wheel.after engine running and stop engine

a blown bulp...it is a 1.5w bulp

Audi Q7- Driving on highway at 70mph, going down hill and not using the gas pedal, as I was going up the hill, I put my foot on the gas and the car stalled. This happened twice on an 10 hour road trip. Can you explain the problem please.