I don't think the Euros are born equal... I haven't had a single problem with my BMW and have had it for a while. It's heading onto 5 years old now. But it's not a diesel.
Mates with VWs and Audis (and my Uncle that runs a fleet) had problems not with the fact they are diesel but just general maintenance (electrics, gearboxes, fit and finish, turbo guzzling oil, another - just one though - blew its turbo!).