Hyundai Santa Fe 2017 Problems

The diesel is rated to tow up to 2.5-tonne so it should handle your camper with ease. There are a few reports of transmission/transfer case failures, as your mechanic has told you, but it’s not widespread, and with a warranty that lasts for five years with unlimited kilometres you should be well covered if something does go wrong.

It's hard to give you a definite recommendation, as most cargo measurements are in litres rather than floor length, but I reckon most mid-size wagons and large SUVs would do the job for you. 

Most of these have a flat boot floor with the seats folded, and likely have ample body length for sleeping. 

So Mazda6, Skoda Superb or Ford Mondeo wagons are worth a look, plus large SUVs like the Mazda CX-9, Kia Sorento and Hyundai Santa Fe. 

Don't be afraid to try them out for size at the dealers either. You'd certainly test out a mattress before buying right?!

Seems it will be possible. We put your question to Hyundai and were told "a hardware upgrade is in the works and should be available in the next month or so".

All of the vehicles are worthy choices, but you need to be careful about the towing ratings of them. The Kia Sorento, which would be my choice, is rated at 2000kg, which is right on your towing requirement. Others, such as the 2WD Everest, are rated to tow much more. Others, like the Mitsubishi Pajero and Toyota Prado, are full-on 4WDs, and would seem beyond your needs.

All of the models you list would do the job you want well, so it comes down to personal choice. Add in the Kia Sorento and you have the field pretty much covered. The Sorento generally gets the most ticks from CarsGuide reviewers.

You've singled out two of the best in the class. Others to consider are the Mazda CX-9 and the Toyota Kluger, but it's hard to go past the Sorento and Santa Fe. Comparison information is available if you click on car reviews and go to the models you are interested in.