yes its located on the front of the block next to the oil filter...
its held in place by i think is a small allen key headed bolt. possibley a 5mm. you need to check the size on etka..
my mate took his 8v the dealer.... only because he didnt know where or what it was.....
i've seen the crank sender on the vr6 its not hard to get at........ so i cant see the 16v having any problems basicly an 8v block......
you need to jack the car up and get at it from under the car.....
if you need any more help try vwvortex forums
www.vwvortex.com some people on their are engine dismantlers and rebuilders.....
in fact there is a diy guide on how to do anything on there.......