On a Passat, the battery is located under the hood. It is under the cowl panel and requires the removal of the battery cover to see it.
No it will not restart
AAA
Here's what I used for my 2006 Passat: http://forums.vwvortex.com/zerothread?id=3334037
On the 2006 passat it is under the hood in the battery box. On some passats it is located in the trunk on the left side (US driver) behind a cosmetic panel.
By the firewall (far back, center), simply slide the battery cover to reveal the actual battery.
By the firewall (far back, center), simply slide the battery cover to reveal the actual battery.
Next to the firewall in the engine compartment.
Use your key to unlock the door.
under the hood, closer to the windshield, you have to slide over a black cover to the left to reveal the battery terminals
Anyplace that sells batteries can answer this question for you.
If that's dollars it is.
go to radio shack