I guess its the same with any prestige luxury car though... when they go wrong, they cost a fortune to fix. Even when they get old, the badge is still on the grille so to speak. It might be an old Audi or an old Mercedes, but its still a luxury car!
I watch a channel on YouTube, I can't recall the name at this moment. Basically, the chap buys old luxury cars that have seen better days and he brings them to a garage that specialises in that particular brand of car. The mechanic puts them up on the ramp and starts listing all the things that are wrong. Some of the repair bills just to get the car back to decent condition really are eye watering... sometimes £8,000-£10,000+
Usually, these cars are around 20 years old minimum!
Not that I'm implying the Audi shown above is anything like that. It looks like a beautiful car and has clearly been well looked after. Just if things did go wrong, it would be very pricey.