Missing original ignition keys, of year released 8/97, 2.8L A6 QUATTRO Tiptronic auto trans Number W4255230425 and VIN.num.WAUBA34b6WN116458. I THINK EVERY REQUIREMENT TO BUY CAR, AND HOW MUCH?

have you cked the glove box for a sticker with a 4 digit #
if you have the owners manual ck under Radio or Safety
for the 4 digit code.
If not there you'll have to contact Audi

Google it - Check this LINK. If your horn or other steering wheel controls do not work, it's likely the clockspring - the device that transmits the inputs from the steering wheel into the wiring harness under the dash. Pray it's not, otherwise your Audi tech will be buying himself a new S4.

Td

ALL 1999 Audi A6:
A6 Quattro Sedan
A6 Quattro Wagon
A6 Sedan
have the 2.8L DOHC V6

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

Radio lock out codes are security related and where supplied with the original paper work when the car was delivered to the original owner to discourage theft, so they are not published on the web, if they were what would be the point? Any thief could get the code after stealing your radio.

Contact the dealer for instructions and what info u need to get your cars unique radio code. The dealer will require the serial number off the radio and proof of ownership of the car it came from.

Hope help with this.

This is a manual transmission? If so the clutch probably needs to be replaced. When you say "VIOLENTLY" what is going on, what is the road speed, what are the RPMs at? The more specific information the better. And this problem ONLY occurs between gear changes, right? The other times, everything is normal?

need to get trans checked by knowledgeable machanic,maybe its not engaging because the selector isnt working,big money if incorrect diagnosis,but does need to be looked at by expert

You have to bleed the system, most likely air, or you blew the fuel pump fuse !

Check your fluid level .

try autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you

The trans don't have a dipstick, they have to be checked at a dealership with a vag tool, they have to be checked at a certian temperature of operation, as far as fluid i would use the audi recommended G-052-162-A2 atf fluid required