Where is negative terminal in trunk of Audi 1999 A8 Quattro

Thanks I ssume then that it is all right to hook negative cable to the negative battery pat as it looks like it has another lighter cable from the battery negative post going somewhere which would be metal ground

That is correct and will work if you are planning to jumpstart it, However it is recommended to place the negetive jumper cable to bare metal of the car being jumped thats safer because of the spark that may accure when attaching it, If the were a crack in the battery leaking gas (highly unlikely I know). The othe three cables are attached to the proper battery termimal post.

Steve you are top drawer it helped a lot I do not know if I can ask this question but what battery wold you suggest for the Audi 1999 A8. Quattro that us good as The OEM BUT SOLD IN UNITED STATES MY BATTERY NOW WHEN JUMP STARTS DOWS START ENGINE BUT TYRN OFF AND WILL NOT START BUT LOUS CLICKING SOUND AND POWER IN DAAH AND ACCESSORIES THE BATTERY WAS NOT USED FOR THREE WEEKS IN SUB ZERO COLD IT IS ABOUT THREE TO four years old I THINK I HAVE A BAD BATTERY Sorry fir so many questions

How long did you let it run before turning it off?

Sorry to say that is a very expensive battery $145.00 to $185.00. The battery may have gone dead from the 3 weeks in the cold, But once you jump start it the altenator should recharge the battery. It might take a long time of running to recharge it. Maybe 20 minutes or more.(Or you could use a trickel charger if you have one) Then you could see if the battery will hold the charge before buying a new one.

If you do need a new battery I would recommend the cheapest one you can find at a local auto parts store. Any battery that is that same size would be specifically made for your car and would work well. The Audi A8 Quatro has always been a very nice automobile, Good luck with her.

i need to get into my trunk with no battery and no power key wont work.

1998 audi a8 quattro