I am in the process of looking at getting a heavier caravan such that my DEPENDABLE Skoda Octavia will be insufficient to tow it, and am looking at (probably) s/h vehicles such as the Passat, Audi A4 & A6 Estates.

I would prefer an Auto box, (without a torque converter) but I'm completely bamboozled by the 3 or 4 different Auto boxes that have been fitted. I know the new DSG box, but not the various Tiptronic variants that have been used.

Can anyone advise on the most reliable/efficient AUTO box allied to a diesel engine, in either the Passat or Audi ranges?? Thanks.