Not a thing after 2 years and 26,000km.
One factory recall to replace brake fluid reservoir cap.
Seats too hard.
Ventilation/Air Conditioning needs modifications for HOT climates.
I too have found the seats in the Opel/Holden Vectra rather hard. But most German cars have firm seats. I am a NZ'er and with the variety of cars in NZ I have to say that the softer-seated cars come from Japan, or if you like European cars, try French cars, they are rather soft seated.