I'm starting to think we should keep the Touareg for towing. It makes a damned nice tow vehicle for having a resale value of only $14k. It's rated towing cap is 8,700#, though it only has a 6k# hitch.
I got a response from Dean at Invisihitch. Their hitch for the GT is only 2500# cap. Even though we only tow the ski boat a few times a year, I think its 3500 lbs. would be too much strain on the GT when pulling the boat out of the water.
So, if I take towing out of the requirement list, maybe a loaded 2010 Touring would be the answer. CPO, of course. Owning an out-of-warranty car like this is not for the faint-of-heart.
FWIW, I've felt like our BMW dealer and BMWNA treated me much better than VW/Audi regarding warranty items. The BMW dealer would voluntarily repair or replace parts without me having to make a federal case out of it. Audi? At 48k the CPO Allroad had cracked CV joint boots. They called it normal wear & wanted $ 900. And don't get me started on VW. We had to replace the tranny in our daughter's '06 Jetta at 66k. Despite VW's announced warranty extension for the Jetta trannys, they refused to provide any assistance.
I've read about most of the E60 problems you mention. Without me restarting this thread on a new forum, do you thing buying a dealer buyback/lemon is safe. Did they actually fix the HPFP problem?
'05 VW Touareg V8, '01 Audi A6 Avant, '06 Jetta
'99 540iT'01 Audi allroad, '97 540i, '93 Lexus SC300 m, '89 535i, '83 635i, '85 Alfa GTV6, '79 320i, '71 & 69 2002, '69 Alfa Spider