I have no idea how accurate this information is, but it’s somewhat consistent from what I’ve heard and read in other places.
Car buying and owning in Europe is totally different, and the taxes will kill you. On a (new) car, the tax is 100-180% in Denmark, and, according to the article above, it’s 19% in Germany (don’t know about used cars).
I took a quick look at used A5 prices, and one listing I saw for 2015 A5 said it was being listed for 33000 (!) euros.
The view times I’ve travelled in Europe (UK, Italy, Greece), you never see cars like an A5, and a 2.0 I4 is considered a large engine. Petrol [gas] is exceedingly uncommon.
Seriously, everyone is driving a 10+ yr old Golf (or similarly-sized hatchback). And even that seems kind of big in Europe. The one Arteon I saw seemed ENORMOUS. Cars like a Honda Fit seem perfectly sized for most of the European roads I’ve been on. I think most Europeans would be horrified by the idea of leasing b/c they hold their cars forever (b/c they’re expensive to buy, and many households have only one car).
When I was more active on the mbworld.org forum, Europeans would say that the price we pay for luxury cars are insanely low.
If German car-buying habits are like people in the UK, you will stick out for driving an A5, and not necessarily in a good way.
Also be aware that driving in Europe is considered a privilege, not a right, and my experience of Europeans is that they tend to be way more anal about driving well than are 99.9% of Americans (or maybe just 99.9% of the people in LA).
Regarding maintenance in Europe, that was never something that came up on the mbworld forum (obviously came up all the time for US owners). My vague impression is that Europe has heavily subsidized extended warranties, but don’t quote me on that.