> I think you can use the Mann/Mahle oil filter for 2.1 engine... yes?

Yes you can.  Both the Mann and the Mahle are OE filters that have the correct anti-drainback valve designed to prevent oil starvation during startup, as required by Volkswagen for use on the Wasserboxer engine. This is what differentiates them from the Golf/Jetta filter that will also physically fit.  We sell them for $4.29 each.

http://www.busdepot.com/070115561

Ron Salmon
The Bus Depot, Inc.
www.busdepot.com