I need a diagram for serpentine belt, there are 2

SOURCE: serpentine belt diagram

http://www.mvreader.com/multiview/dayco/catalogSearch.php?autoCatalogSearch=1&make=VOLKSWAGEN&model=PASSAT&year=2005&year_from=&year_to=&engine=All&l=n

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SOURCE: I need a diagram for the serpentine belt routing

go here and wander a bit
rights to them who put it there
http://forums.vwvortex.com/zerothread?id=4172138

SOURCE: Replacing serpentine belt

try these websites to see if they have your car listed it www.autozone.com and www.alldatadiy.com also try these website to see if you can get a diagram its www.webcrawler.com and for the most part they should be a diagram under you hood showing you how to install your new belt.

SOURCE: 99 Beetle Serpentine belt diagram

The serpentine belt on my 2001 Beetle loops around the outside of the large pulley closest to the firewall, at the bottom, then goes around the outside of the forward lower pulley, then crosses to the inside of the one right above the forward lower pulley, then loops over the outside of the alternator pulley at the top front side, then goes inside under the tensioner pulley, and back down to the outside of the big rear pulley.

I hope that description makes sense. A picture would work a lot better, but I don't have an easy way to post it. Also, I know you asked about the '99 Beetle, but I assume its routing is the same as the 2001 (which is the one I have).