Wahid

My audi a8 quatro the battery dead and the stuck I can't open the trunk to jump start as the battery located in trank please help me out to start my car

DubaiRich

Since the battery is in the trunk, under the hood should be a + positive battery terminal. Use that and used a metal place on the engine for the negative. If you have an owner's manual, it will show you the location. Look for a red plastic cover

Giovanni Giovino 6.0+6.0TT

There is no positive post under the hood of an A8.

Giovanni Giovino 6.0+6.0TT

Hello Wahid,
Did you try your key in the trunk key slot, you have to bend down and look up to see it, if your key did not work in the trunk and the vehicle is open you have some options, such as the cigarette to cigarette jumper plugs to only supply enough to pop the trunk, nothing else, do not turn the key on, or supplying power to a fuse on either side of the dash (see fuse layout pdf), again only to pop the trunk, or as IIRC Mister Bally showed us, if your vehicle is all locked down, then you go in through the belly pan on the passenger side to access the alternator, there you will attach the positive jumper cable to the positive lead that charges the battery, then hook the negative to the body for ground/negative, again this is only for popping the trunk to gain access to the battery, NOT for the starting of the engine.