I had a 2004 Touareg V8 before this one and it had a lot of electrical problems. Replaced it with the V10 and couldn't be happier, one of the best vehicles I have owned. It has amazing performance, gets very good fuel economy considering its weight and size and will tow over 7700 lbs. Haven't had any problems with it, just normal maintenance, which isn't cheap but I have a prepaid maint. plan. It does eat up tires but haven't had to replace the brakes (30k miles).
Performance. Towing capbility. Off road capability.
A lower setting for the air suspension to improve highway handling/economy.