Volkswagen Jetta battery problem (dies regularly after 8 days parked) ... you've definitely got a parasitic draw somewhere. ... For what it's worth the 98 New Beetle I used to drive around would ...Jan 23, 2017 · Parasitic drain is a problem on most (all?) heavily computerized cars. It's well known that Corvettes for example (I have one) can flatten their batteries in a couple weeks if not on a "tender". The battery failures reported above sound like solid failures of the AGM battery, probably nothing to do with parasitic drain.