Haha... weirdly, I've also done a ton of towing with MKIV ALH TDIs. They're absolutely excellent vehicles for towing, and hardly use any fuel while doing so. Sometimes it gets a lot of unwanted attention - especially at a boat ramp, because Americans don't expect cars to be able to tow like that.

When I was in Ireland for work, I saw that a huge fraction of the farmers use MKIV TDIs for their farm work vehicles- they're all over the place pulling huge trailers full of livestock and hay, and still using half the fuel of most cars that are unloaded.