i just bought this a4 a little over a week ago and it feels like i bought nothing but trouble its sounds like the fuel pump is humming randomly mainly when i turn key over also when i try to turn the car over it like stutters or trys a lot harder than it should to start and now my driver window is sounding like its struggling to go up within the first week i spent 1200 to get a coolant leak fixed the alternator wires were cut n twisted together with some tape on them from the previous owner n audi fixed it supposivly the dealership (not a audi dealership) is being pieces of **** on this whole deal they said all these problems im claiming are the nature of audi's i dont wanna get rid of this car at all i always wanted a audi but im starting to think i got screwed horribly has this happened to any body please help it personally sounds like a ground problem but ive never had to deal with a audi and i know low voltage can be a pain in the *** it sucks because the day i bought it everything was fine n then day after day it seems like its falling apart i could be over examing everything but the troubles turning over is not cool at all these arent half the problems but this is what i wanna fix first also on the list need timing belt done crank shaft seal leaking valve cover seal leaking thats 1900 to fix not including these electrical problems n one day i slammed on the brakes kinda hard and my stereo started bouncing speaker to speaker like the signal didnt know where to go PLEASE HELP!!!

 

Sorry to hear that man! It's kind of strange, but some Audi's are more reliable than others. Knowing what I know now, the next Audi I buy will be thoroughly checked out before being purchased. What year is your Audi? I would post this in one of the specific Audi A4 forums, ie B5, B6, B7 etc. to get help. Not sure how many people on here frequent the Computer & Fuel systems section. I don't know anything about working on cars, but I've had my 2000 A4 1.8TQM for about 3 years and the work I've done has mainly been maintenance, ie brakes, timing belt/ water pump, vacuum tubes, O2 & MAF sensors. My advice to you would be to find a small shop in your area that REALLY knows Audis. When I first bought mine, I took it to the dealership and paid over $2000 to have some leaky tubes, the water pump, and a speaker replaced. Probably could have had it done for less than half that price if I had taken it to the shop I take it to now. Best of luck!

 

Fix the car and sell it..i know a audi mechanic who haaaates audi's and he says the only cars that are reliable are the 06 and newer cars get your self a b7 or b8 and be done with it..too many electrical problems...every car is different unfortunatly with german cars some last 40k some last 140k its a crap shoot sometimes

 

The fuel pump is humming because you need a new fuel filter. Relatively easy and cheap to fix. The cost of NOT fixing it will be a new fuel pump; then you will really hate your car.
The window issue is more labor intensive to fix, but the window guides are very inexpensive. Do you do your own work or do you get rape at the dealership with their $130/hour rate? Your answer to that will dictate if you keep your car or not.
The timing belt is a must-do maintenance, and usually the buying price of an Audi will depends on whether this has been done or not, but you did not specify the year and mileage of your 1.8T.