Hi, i'm having a little problem with stereo on my 98 Audi A4

please test the fuse for open or dirty or corrosion or bad contact.
2) tight the wires connector very well.
3) see if the connection are propely connected and not missing
see the diagram attached.
God bless you

Walmart has inexpensive brand names (Pioneer,JVC) that have aux hookups.

You have to contact an Audi dealer and provide your VIN# to get security code for radio

The easiest way to wire it is to get a pre-fit harness that fits the vehicle and stereo. Search the stereo's web site to find one.

well i dont know how handy you are but check if the grounds are all good also check if you are getting power to the stereo sum have a fuse in the unit

hi, your best bet is to go to a stereo sales place like best buy and get an install kit specifically for your car, that way there is no cutting wires, everything will just plug right in and they sell kits that will allow you to install aftermarket units directly into the dash without cutting anything. Very professional.

Did you or someone put the stereo in?Or is it the original factory radio?If it is a new installation you missed a wire that is 12volts all the time weather the car is on or off that holds the memory.

look at crutchfield.com for free, they should be able to answer you're question...
Good Luck

No. I would go with the cheaper set.

That's weird that they won't help you out. Usually if the stereo is in the car and you show proof of ownership of the vehicle, they'll give you the code for a fee. I'd call another Audi dealer (or a VW dealer - same corporation so they should be able to help) and see if they'll do it for you. Typically they look up the code based on the VIN of the vehicle, but obviously since your stereo was replaced they can't do it that way. Hopefully another dealer will be more understanding of the situation and will help you out. That's the only way to get it though.