Dead Jetta, will not start even with jumpers

Start by checking battery terminals to make sure they are tight, clean, and not corroded. If they are good, have the battery load tested. Most parts stores will do it for free. At this point (not running) the alt isn't doing anything, so we need to get the battery working again. Before you take it to be checked, make sure it is fully charged; otherwise, it will fail the test.

Let me know what you find.