Hiya,
Am going to soon be a first time Audi owner. My Dad recently passed away so I'm using some of my inheritance to by myself a nice car. Well, it'll be nice by my standards! So, out goes the 1.8 Vectra and in comes an A6 2.0 TDI Ultra Black edition with SLine trim. 2016 model with 37k on the clock.
Can't wait! Although my main concern will be ride comfort as it sits on 20" alloys with 255/35 boots. I have 7 days though to decide if I like it. Well, more like if the wife and kids like it!
Anything I should be looking out for? Dealer is doing the timing belt and water pump before they deliver the car.
Mechanically, A6's are really strong. Electrically they can be a NIGHTMARE. Do not buy one with a sunroof. Every car that I'm aware of with a sunroof, the sunroof started to leak. And that's not hyperbole, it's a fact. They just leak. And they're £400 for a lubrication service every 2 years.
If it's an s-tronic make sure that's had the oil changed when required. And a full service history obviously. The tyres are not cheap so make sure they all match and that they're in good condition.
Make sure the Sat Nav is up-to-date and that the radio traffic licence is activated for at least 12 months. If it's not then you'll need to pay Audi for the traffic updates on the Sat Nav.
Make sure the screen slides out of the dash smoothly. They can be horribly jerky.
Check every electric toy works. The buttons fail. And they're crazy expensive to repair with new parts although there are loads of used parts on eBay.
Check the MMI controller centre wheel. It should click when it rotates and it should click when it presses down. I had to have two replaced under warranty because the button went soft and non-clicky. And it's absolutely vital that that controller works properly.
100% get a good warranty. Ideally an Audi warranty that covers all the electronics because anything on the interior of these cars is £1000 to fix. And most modules are component protected so you need a dealer to unlock the module so you can recode it when you change it.
Count the keys. If you look on the MMI it shows how many keys are registered to the car. The keys are the physical key that slides out of the plastic button carrier. The little black circle is the immobiliser chip. The number of keys on the MMI should match the number of physical keys you receive. It's normally two. There can be a third key in a plastic card thing in the glovebox but I think that was mainly pre-facelift cars. I think all the Ultra's were facelifts - you can tell by the headlamps and DRLs. A facelift S-line will have LED headlamps (excellent). A pre-facelift will have Xenon headlamps (actually better headlamps but £400 to replace the bulb or ballast when they fail).
The only other thing that failed regularly on mine was the fuel flap release. Not the cable or the electronics but the actual little black bit that rotates into the cover to keep it in place. These fail A LOT. not crazy expensive to repair (about £180 incl. the labour) but REALLY irksome when you roll into the petrol station and you press the cover and it doesn't open. That's REALLY irksome, I promise you! I had four replaced under warranty across 4 cars and the last A6 allroad I had had one fail the second time in the fourth year of ownership so I had to pay for it. It just levers open with a plastic trim tool, but who has a trim tool in the car usually? So maybe buy a trim tool for the glovebox?