Better late than never to this thread.
I love my '04 Passat wagon ($14,995 used w/37k miles via eBay in August 2010) and '03 Jetta ($19,100 new via eBay) Diesels, both automatics. I'm 61 and these will probably be the last cars I ever buy. I drove the Jetta 110 miles round trip to work. Filled it up once a week. We are an all Diesel family except for our zero turn mower (Z425) and a Toro walk behind.
Here is a pic of my Passat pulling a trailer with my Deere 4100 CUT. Just a bit over what the Passat is rated to haul

but I very, very carefully pulled it some 400 miles from where I bought the Deere. I scaled it just to see what it all weighed (in pounds):
Steer 2160
Drive 2160
Trailer 3360
Gross 7680
The Passat curb weight is about 3500 pounds.
I got about 16 mpg pulling just the trailer into a 25 mph wind on the way out and 20 mpg pulling the loaded trailer back with the same wind - both ways in fourth gear (out of five.) And I bungied up the safety chains at this stop. The tractor was well chained to the trailer.
The Passat gets around 35 mpg mixed and the Jetta 44 mpg mixed.