I had a Passat a few years back and it had a design flaw where the tray that holds the battery has drain holes that can get blocked and if they do it overflows into the interior of the car.

I used to park my car under trees that dropped leaves which blocked the battery compartment drainage holes and as I am in Scotland it can get quite wet. Ended up with car filled with 1" of water.... Interior of car had to be stripped, dried out and put back in by the dealer.

I'm always tempted to test drive stylish German cars but I swear 90% of the maintenance horror stories I've heard in the last 15 years have involved a German car.

VW in particular has a pretty poor reputation for long term reliability (also see Consumer Reports et al). The stories I hear about American cars, by contrast, tend to be poor reliability soon after purchase (followed by solid long term reliability)

Not sure I would describe a Passat as "stylish" :-)

It's when you realize your OEM sunroof leaks just like an '70s aftermarket sunroof but there is a drain that keeps you from noticing. Or there was a drain, now it's full of dirt and debris and doesn't drain very well.

Window and trunk leaks